The purpose of all research is to describe and explain in the world. Variance is simply the difference; that is, variation that occurs naturally in the world or change that we create as a result of a manipulation. Variables are names that are given to the variance we wish to explain. A variable is either a result of some force or is itself the force that causes a change in another variable. In experiments, these are called and variables respectively. When a researcher gives an active drug to one group of people and a placebo , or inactive drug, to another group of people, the independent variable is the drug treatment. Each person's response to the active drug or is called the dependent variable. This could be many things depending upon what the drug is for, such as high blood pressure or muscle pain. Therefore in experiments, a researcher manipulates an independent variable to determine if it causes a change in the dependent variable. As we learned earlier in a descriptive study, variables are not manipulated. They are observed as they naturally occur and then associations between variables are studied. In a way, all the variables in descriptive studies are dependent variables because they are studied in relation to all the other variables that exist in the setting where the research is taking place. However, in descriptive studies, variables are not discussed using the terms "independent" or "dependent." Instead, the names of the variables are used when discussing the study. For example, there is more diabetes in people of Native American heritage than people who come from Eastern Europe. In a descriptive study, the researcher would examine how diabetes (a variable) is related to a person's genetic heritage (another variable). Variables are important to understand because they are the basic units of the information studied and interpreted in research studies. Researchers carefully analyze and interpret the value(s) of each variable to make sense of how things relate to each other in a descriptive study or what has happened in an experiment. | Explore Jobs - Jobs Near Me
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The Different Types Of Variables Used In Research And Statistics- APR Formula
- Total Variable Cost Formula
- How to Calculate Probability
- How To Find A Percentile
- How To Calculate Weighted Average
- What Is The Sample Mean?
- Hot To Calculate Growth Rate
- Hot To Calculate Inflation Rate
- How To Calculate Marginal Utility
- How To Average Percentages
- Calculate Debt To Asset Ratio
- How To Calculate Percent Yield
- Fixed Cost Formula
- How To Calculate Interest
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- How To Calculate Adjusted Gross Income
- How To Calculate Consumer Price Index
- How To Calculate Cost Of Goods Sold
- How To Calculate Correlation
- How To Calculate Confidence Interval
- How To Calculate Consumer Surplus
- How To Calculate Debt To Income Ratio
- How To Calculate Depreciation
- How To Calculate Elasticity Of Demand
- How To Calculate Equity
- How To Calculate Full Time Equivalent
- How To Calculate Gross Profit Percentage
- How To Calculate Margin Of Error
- How To Calculate Opportunity Cost
- How To Calculate Operating Cash Flow
- How To Calculate Operating Income
- How To Calculate Odds
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- How To Calculate Z Score
- Cost Of Capital Formula
- How To Calculate Time And A Half
- Types Of Variables
Find a Job You Really Want In Scientists and statisticians conduct experiments on a regular basis. Scientists use these experiments to identify cause and effect, while Statisticians use variables to represent the unknown or varied data in their experiments. Determining which variables to use is vital to the experiment. Also, choosing the right variables will lead to clearer analyses and more accurate results. What Is a Variable?A variable is something you can control, manipulate, or measure when conducting research or experiments. They are characteristics, numbers, or quantities and can represent specific items, people, places, or an idea. The variables may be referred to as data items. The variables in an experiment will vary depending on the desired outcome. All scientific experiments and statistical studies will analyze a variable. They are referred to as variables because the values can vary. A variable’s value can change within a single experiment. Whether there is a change between the groups being studied or the value changes over time, it may not necessarily be a constant. Designing ExperimentsAs noted, all scientific experiments and statistical studies will control, manipulate, or measure a variable. In fact, the experiments are usually designed to determine the effect one variable has on another variable, cause, and effect. When designing experiments, it is extremely important to choose the right variables. Choosing incorrectly can skew the results and derail the experiment or study completely. Choosing right can help an experiment or study run much more smoothly and produce more accurate results. It is not just the specific variable within the experiment that needs to be determined, but the variable type as well. Knowing the variable type will allow you to interpret the results of the experiment or study. It should be noted, though, that categorizing variables is a little subjective. Scientists and statisticians have some wiggle room when they categorize their experiment variables. Generally, you will need to know what data the variable represents and what part of the experiment the variable represents in order to determine the variable type. Independent, Dependent, and Control VariablesTypically, there will be an independent variable, dependent variable, and control variable in every experiment or study conducted. Independent variables. Independent variables are the variables in your experiment that are being manipulated. They are referred to as independent variables due to the fact that their value is independent of other variables, which means that the other variables cannot change the independent variable. Dependent variables. Dependent variables are the variables in your experiment that rely on other variables and can be changed or manipulated by the other variables being measured. Control variables. Control variables are the variables in your experiment that are constant. They do not change over the course of the experiment or study and will have no direct effect on the other variables being measured. Qualitative Versus Quantitative VariablesEvery single variable you include in your experiment will need to be categorized as either a qualitative variable or a quantitative variable. Qualitative variables. Also referred to as categorical variables, qualitative variables are any variables that hold no numerical value. They are nominal labels. For example, eye color would be a qualitative variable. The data being recorded is not a number but a color. These variables don’t necessarily measure, but they describe a characteristic of the data set. They can be broken down further as either ordinal variables or nominal variables (see below for definitions). Quantitative variables. Quantitative variables, or numeric variables, are the variables in your experiment that hold a numerical value. Unsurprisingly, they will represent a measurable quantity and will be recorded as a number. These variables will measure “how many” or “how much” of the data being collected. These can be broken down further as either continuous variables or discrete variables (see below for definitions). 30 Other Variable Types Used in ExperimentsThis is by no means a comprehensive list, as the list of all variable types would be difficult to document in one place. Below are many of the common and some less common variable types used in scientific experiments and statistical studies. Included is a brief overview of what that variable type measures. Active variable. An active variable is a variable that can be manipulated by those running the experiment. Antecedent variable. Antecedent variables come before the independent and dependent variables. With “antecedent” meaning “preceding in time or order,” this is not surprising. Attribute variable. An attribute variable also called a passive variable, is not manipulated during the experiment. It may be a fixed variable or simply a variable that is not manipulated for one experiment but could be for another. Binary variable. Binary variables only have two values. Typically, this will be represented as a zero or one but can be yes/no or another two-value combination. Categorical variable. Categorical variables are variables that can be divided into larger buckets or categories. Shoe brands, for instance, could include Nike, Reebok, or Adidas. Composite variable. This variable type is a bit different from others. A composite variable is made up of two or more other variables. The individual variables that make up the composite variable will be closely related either conceptually or statistically. Confounding variable. Confounding variables are not good. They can affect both independent and dependent variables and invalidate results. Sometimes referred to as a lurking variable, these variables are considered “extra” and were not accounted for during the designing phase. Continuous variable. Continuous variables have an infinite number of values between the highest point and lowest point. Distance is a continuous variable. Covariate variable. A covariate variable can affect the dependent variable in addition to the independent variable. It will not be of interest in the results of the experiment, though. Criterion variable. This is a statistical variable only. It is another name for the dependent variable. Dichotomous variable. This is another name for a binary variable. Dichotomous variables will have two values only. Discrete variable. Discrete variables are the opposite of continuous variables. Where continuous variables have an infinite number of possible values, discrete variables have a finite number. Endogenous variable. Endogenous variables are dependent on other variables and are used only in statistical studies, in econometrics specifically. The value of these variables is determined by the model. Exogenous variable. An exogenous variable is the opposite of an endogenous variable. The value of this type of variable is determined outside of the model and will have an impact on other variables within the model. Explanatory variable. This is a commonly used name for the independent variable or the variable that is being manipulated by those running the experiment. Grouping variable. A grouping variable is used to sort, or split up, the data set into groups or categories. Interval variable. Interval variables show the meaningful difference between the two values. Intervening variable. Intervening variables, or mediator variables, explains the cause, connection, or relationship between two other variables being measured. Manifest variable. A manifest variable is a variable that can be directly observed or measured within the experiment. Moderating variable. A moderating variable can affect the relationship between the independent variable and dependent variable. It can either strengthen, diminish, or negate the relationship. Nominal variable. This is another way of saying categorical value. Nominal values will have two or more categories. Observed variable. Observed variables are variables that are being measured during the experiment. Ordinal variable. Ordinal variables are similar to categorical or nominal variables but have a clear ordering of categories. Examples such as High to low and like to dislike would both be ordinal variables. Polychotomous variable. Polychotomous variables have more than two possible categories or values. These can be either nominal or ordinal. Ranked variable. Ranked variables are ordinal variables. The researcher may not know the exact value, but they will know the order in which the data points should fall. Ratio variable. Ratio variables are similar to interval variables but have a clear definition of zero. Responding variable. Responding variables are the effect or outcome of the experiment. Similar to dependent variables, responding variables will “respond” to changes being made in the experiment. Scale variable. A scale variable is a variable that has a numeric value that can be ordered with a meaningful metric. It will be the amount or number of something. Study variable. Often referred to as a research variable, a study variable is any variable used that has some kind of cause and effect relationship. Test variable. A test variable also referred to as the dependent variable, is a variable that represents the outcome of the experiment. How useful was this post? Click on a star to rate it! Average rating / 5. Vote count: No votes so far! Be the first to rate this post. Chris Kolmar is a co-founder of Zippia and the editor-in-chief of the Zippia career advice blog. He has hired over 50 people in his career, been hired five times, and wants to help you land your next job. His research has been featured on the New York Times, Thrillist, VOX, The Atlantic, and a host of local news. More recently, he's been quoted on USA Today, BusinessInsider, and CNBC. Recent Job Searches- Registered Nurse Jobs Resume Location
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Related posts What Does White-Collar Mean? (With Examples) How To Calculate The Inflation Rate (With Examples) What Is Competitive Strategy? Emotion Wheel: What It Is And How To Use It Have a language expert improve your writingRun a free plagiarism check in 10 minutes, generate accurate citations for free. Methodology - Types of Research Designs Compared | Guide & Examples
Types of Research Designs Compared | Guide & ExamplesPublished on June 20, 2019 by Shona McCombes . Revised on June 22, 2023. When you start planning a research project, developing research questions and creating a research design , you will have to make various decisions about the type of research you want to do. There are many ways to categorize different types of research. The words you use to describe your research depend on your discipline and field. In general, though, the form your research design takes will be shaped by: - The type of knowledge you aim to produce
- The type of data you will collect and analyze
- The sampling methods , timescale and location of the research
This article takes a look at some common distinctions made between different types of research and outlines the key differences between them. Table of contentsTypes of research aims, types of research data, types of sampling, timescale, and location, other interesting articles. The first thing to consider is what kind of knowledge your research aims to contribute. Type of research | What’s the difference? | What to consider | Basic vs. applied | Basic research aims to , while applied research aims to . | Do you want to expand scientific understanding or solve a practical problem? | vs. | Exploratory research aims to , while explanatory research aims to . | How much is already known about your research problem? Are you conducting initial research on a newly-identified issue, or seeking precise conclusions about an established issue? | | aims to , while aims to . | Is there already some theory on your research problem that you can use to develop , or do you want to propose new theories based on your findings? | Receive feedback on language, structure, and formattingProfessional editors proofread and edit your paper by focusing on: - Academic style
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See an example The next thing to consider is what type of data you will collect. Each kind of data is associated with a range of specific research methods and procedures. Type of research | What’s the difference? | What to consider | Primary research vs secondary research | Primary data is (e.g., through or ), while secondary data (e.g., in government or scientific publications). | How much data is already available on your topic? Do you want to collect original data or analyze existing data (e.g., through a )? | | , while . | Is your research more concerned with measuring something or interpreting something? You can also create a research design that has elements of both. | vs | Descriptive research gathers data , while experimental research . | Do you want to identify characteristics, patterns and or test causal relationships between ? | Finally, you have to consider three closely related questions: how will you select the subjects or participants of the research? When and how often will you collect data from your subjects? And where will the research take place? Keep in mind that the methods that you choose bring with them different risk factors and types of research bias . Biases aren’t completely avoidable, but can heavily impact the validity and reliability of your findings if left unchecked. Type of research | What’s the difference? | What to consider | | allows you to , while allows you to draw conclusions . | Do you want to produce knowledge that applies to many contexts or detailed knowledge about a specific context (e.g. in a )? | vs | Cross-sectional studies , while longitudinal studies . | Is your research question focused on understanding the current situation or tracking changes over time? | Field research vs laboratory research | Field research takes place in , while laboratory research takes place in . | Do you want to find out how something occurs in the real world or draw firm conclusions about cause and effect? Laboratory experiments have higher but lower . | Fixed design vs flexible design | In a fixed research design the subjects, timescale and location are begins, while in a flexible design these aspects may . | Do you want to test hypotheses and establish generalizable facts, or explore concepts and develop understanding? For measuring, testing and making generalizations, a fixed research design has higher . | Choosing between all these different research types is part of the process of creating your research design , which determines exactly how your research will be conducted. But the type of research is only the first step: next, you have to make more concrete decisions about your research methods and the details of the study. Read more about creating a research design If you want to know more about statistics , methodology , or research bias , make sure to check out some of our other articles with explanations and examples. - Normal distribution
- Degrees of freedom
- Null hypothesis
- Discourse analysis
- Control groups
- Mixed methods research
- Non-probability sampling
- Quantitative research
- Ecological validity
Research bias - Rosenthal effect
- Implicit bias
- Cognitive bias
- Selection bias
- Negativity bias
- Status quo bias
Cite this Scribbr articleIf you want to cite this source, you can copy and paste the citation or click the “Cite this Scribbr article” button to automatically add the citation to our free Citation Generator. McCombes, S. (2023, June 22). Types of Research Designs Compared | Guide & Examples. Scribbr. Retrieved June 24, 2024, from https://www.scribbr.com/methodology/types-of-research/ Is this article helpful?Shona McCombesOther students also liked, what is a research design | types, guide & examples, qualitative vs. quantitative research | differences, examples & methods, what is a research methodology | steps & tips, get unlimited documents corrected. ✔ Free APA citation check included ✔ Unlimited document corrections ✔ Specialized in correcting academic texts What is a Zestimate?The Zestimate® home valuation model is Zillow’s estimate of a home’s market value. A Zestimate incorporates public, MLS and user-submitted data into Zillow’s proprietary formula, also taking into account home facts, location and market trends. It is not an appraisal and can’t be used in place of an appraisal. How accurate is the Zestimate?The nationwide median error rate for the Zestimate for on-market homes is 2.4%, while the Zestimate for off-market homes has a median error rate of 7.49%. The Zestimate’s accuracy depends on the availability of data in a home’s area. Some areas have more detailed home information available — such as square footage and number of bedrooms or bathrooms — and others do not. The more data available, the more accurate the Zestimate value will be. These tables break down the accuracy of Zestimates for both active listings and off-market listings. Active listings accuracyLast updated: April 27, 2023 Note: The Zestimate’s accuracy is computed by comparing the final sale price to the Zestimate that was published on or just prior to the sale date. Download an Excel spreadsheet of this data . How is the Zestimate calculated?Zillow publishes Zestimate home valuations for 104 million homes across the country, and uses state of the art statistical and machine learning models that can examine hundreds of data points for each individual home. To calculate a Zestimate, Zillow uses a sophisticated neural network-based model that incorporates data from county and tax assessor records and direct feeds from hundreds of multiple listing services and brokerages. The Zestimate also incorporates: - Home characteristics including square footage, location or the number of bathrooms.
- On-market data such as listing price, description, comparable homes in the area and days on the market
- Off-market data — tax assessments, prior sales and other publicly available records
- Market trends, including seasonal changes in demand
Currently, we have data for over 110 million U.S. homes and we publish Zestimates for 104 million of them. What changes are in the latest Zestimate? The latest Zestimate model is our most accurate Zestimate yet. It’s based on a neural network model and uses even more historical data to produce off-market home valuations. This means the Zestimate is more responsive to market trends & seasonality that may affect a home’s market value. We also reduced overall errors and processing time in the Zestimate. My Zestimate seems too low or too high. What gives? The amount of data we have for your home and homes in your area directly affects the Zestimate’s accuracy, including the amount of demand in your area for homes. If the data is incorrect or incomplete, update your home facts — this may affect your Zestimate. To ensure the most accurate Zestimate, consider reporting any home updates to your local tax assessor. Unreported additions, updates and remodels aren’t reflected in the Zestimate. Check that your tax history and price history (the sale price and date you bought your home) are accurate on Zillow. If data is missing or incorrect, let us know . Be aware that the model that creates the Zestimate factors in changing market trends, including seasonal fluctuations in demand. So in some cases that may be the reason for a change in your Zestimate. I just listed my home for sale. Why did my Zestimate change? When a home goes on the market, new data can be incorporated into the Zestimate algorithm. In the simplest terms, the Zestimate for on-market homes includes listing data that provides valuable signals about the home’s eventual sale price. This data isn’t available for off-market homes. My home is on the market. Why is the Zestimate so far off? Properties that have been listed for a full year transition to off-market valuations because they have been listed longer than normal for that local market. This can result in a large difference between the list price and the Zestimate. I just changed my home facts. When will my Zestimate update? Updates to your home facts are factored into the Zestimate. However, if the updates are not significant enough to affect the home’s value (eg: paint colors), your Zestimate may not change. Zestimates for all homes update multiple times per week, but on rare occasions this schedule is interrupted by algorithmic changes or new analytical features. How are changes to my home facts (like an additional bedroom or bathroom) valued? The Zestimate is based on complex and proprietary algorithms that can incorporate millions of data points. The algorithms determine the approximate added value that an additional bedroom or bathroom contributes, though the amount of the change depends on many factors, including local market trends, location and other home facts. Is the Zestimate an appraisal? No. The Zestimate is not an appraisal and can’t be used in place of an appraisal. It is a computer-generated estimate of the value of a home today, given the available data. We encourage buyers, sellers and homeowners to supplement the Zestimate with other research, such as visiting the home, getting a professional appraisal of the home, or requesting a comparative market analysis (CMA) from a real estate agent. Why do I see home values for the past? We generate historical Zestimates for most homes if we have sufficient data to do so. Do you ever change historical Zestimates? We occasionally recalculate historical Zestimate values along with major data upgrades or improvements to the algorithm. These recalculations are based on a variety of considerations and, therefore, not every new algorithm release will get a corresponding update of historical values. However, we never allow future information to influence a historical Zestimate (for example, a sale in 2019 could not influence a 2018 Zestimate). Historical Zestimates only use information known prior to the date of that Zestimate. Does the Zestimate algorithm ever change? Yes — Zillow’s team of researchers and engineers work every day to make the Zestimate more accurate. Since Zillow’s founding in 2006, we have deployed multiple major Zestimate algorithm updates and other incremental improvements are consistently released between major upgrades. How often are Zestimates for homes updated? We refresh Zestimates for all homes multiple times per week, but on rare occasions this schedule is interrupted by algorithmic changes or new analytical features. Are foreclosure sales included in the Zestimate algorithm? No. The Zestimate is intended to provide an estimate of the price that a home would fetch if sold for its full value, where the sale isn’t for partial ownership of the property or between family members. Our extensive analysis of foreclosure resale transactions supports the conclusion that these sales are generally made at substantial discounts compared to non-foreclosure sales. For this reason, the Zestimate does not incorporate data about these sales. Who calculates the Zestimate? Can someone tamper with my home’s Zestimate? The Zestimate is an automated valuation model calculated by a software process. It’s not possible to manually alter the Zestimate for a specific property. Can the Zestimate be updated? Yes. The Zestimate’s accuracy depends on the amount of data we have for the home. Public records can be outdated or lag behind what homeowners and real estate agents know about a property, so it’s best to update your home facts and fix any incorrect or incomplete information — this will help make your Zestimate as accurate as possible. You can also add info about the architectural style, roof type, heat source, building amenities and more. Remember: updating home information doesn’t guarantee an increase in the value of Zestimate, but will increase the Zestimate’s accuracy. Does Zillow delete Zestimates? Can I have my Zestimate reviewed if I believe there are errors? We do not delete Zestimates. However, for some homes we may not have enough data to provide a home valuation that meets our standards for accuracy. In these instances, we do not publish the Zestimate until more data can be obtained. The Zestimate is designed to be a neutral estimate of the fair market value of a home, based on publicly available and user-submitted data. For this purpose, it is important that the Zestimate is based on information about all homes (e.g., beds, baths, square footage, lot size, tax assessment, prior sale price) and that the algorithm itself is consistently applied to all homes in a similar manner. I don’t know of any homes that have sold recently in my area. How are you calculating my Zestimate? Zestimates rely on much more than comparable sales in a given area. The home’s physical attributes, historical information and on-market data all factor into the final calculation. The more we know about homes in an area (including your home), the better the Zestimate. Our models can find neighborhoods similar to yours and use sales in those areas to extrapolate trends in your housing market. Our estimating method differs from that of a comparative market analysis completed by a real estate agent. We use data from a geographical area that is much larger than your neighborhood — up to the size of a county — to help calculate the Zestimate. Though there may not be any recent sales in your neighborhood, even a few sales in the area allow us to extrapolate trends in the local housing market. I’m trying to sell my home and I think my Zestimate should be higher. The Zestimate was created to give customers more information about homes and the housing market. It is intended to provide user-friendly data to promote transparent real estate markets and allow people to make more informed decisions — it should not be used to drive up the price of a home. Zestimates are designed to track the market, not drive it. Can I use the Zestimate to get a loan? No. The Zestimate is an automated value model and not an appraisal. Most lending professionals and institutions will only use professional appraisals when making loan-related decisions. I have two Zestimates for my home. How do I fix this? If you see two Zestimates for the same property, please let us know by visiting the Zillow Help Center and s e lecting Submit a request. You may see more than one Zestimate for your address if you are a homeowner with multiple parcels of land. Zillow matches the parcels on record with the county. If you officially combine parcels, the county will send us updated information. What’s the Estimated Sale Range? While the Zestimate is the estimated market value for an individual home, the Estimated Sale Range describes the range in which a sale price is predicted to fall, including low and high estimated values. For example, a Zestimate may be $260,503, while the Estimated Sale Range is $226,638 to $307,394. This range can vary for different homes and regions. A wider range generally indicates a more uncertain Zestimate, which might be the result of unique home factors or less data available for the region or that particular home. It’s important to consider the size of the Estimated Sale Range because it offers important context about the Zestimate’s anticipated accuracy. How can real estate professionals work with the Zestimate? Millions of consumers visit Zillow every month. When combined with the guidance of real estate professionals, the Zestimate can help consumers make more informed financial decisions about their homes. Real estate professionals can also help their clients claim their home on Zillow, update the home facts and account for any work they have done on the property. A home’s Zillow listing is often the first impression for prospective buyers, and accurate information helps attract interest. - Real Estate
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On Commercial Construction Activity's Long and Variable Lags- David Glancy
- Robert Kurtzman
- Lara Loewenstein
We use microdata on the phases of commercial construction projects to document three facts regarding time-to-plan lags: (1) plan times are long—about 1.5 years—and highly variable, (2) roughly 40 percent of projects are abandoned in planning, and (3) property price appreciation reduces the likelihood of abandonment. We construct a model with endogenous planning starts and abandonment that matches these facts. The model has the testable implication that supply is more elastic when there are more "shovel ready" projects available to advance to construction. We use local projections to validate that this prediction holds in the cross-section for US cities. Working Papers of the Federal Reserve Bank of Cleveland are preliminary materials circulated to stimulate discussion and critical comment on research in progress. They may not have been subject to the formal editorial review accorded official Federal Reserve Bank of Cleveland publications. The views expressed in this paper are those of the authors and do not represent the views of the Federal Reserve Bank of Cleveland or the Federal Reserve System. Suggested CitationGlancy, David, Robert Kurtzman, and Lara Loewenstein. 2024. “On Commercial Construction Activity's Long and Variable Lags.” Federal Reserve Bank of Cleveland, Working Paper No. 24-14. https://doi.org/10.26509/frbc-wp-202414 Disclaimer: Early release articles are not considered as final versions. Any changes will be reflected in the online version in the month the article is officially released. Volume 30, Number 8—August 2024 Research LetterPersistence of influenza h5n1 and h1n1 viruses in unpasteurized milk on milking unit surfaces. Suggested citation for this article Examining the persistence of highly pathogenic avian influenza A(H5N1) from cattle and human influenza A(H1N1)pdm09 pandemic viruses in unpasteurized milk revealed that both remain infectious on milking equipment materials for several hours. Those findings highlight the risk for H5N1 virus transmission to humans from contaminated surfaces during the milking process. Highly pathogenic avian influenza A(H5N1) virus was detected in US domestic dairy cattle in late March 2024, after which it spread to herds across multiple states and resulted in at least 3 confirmed human infections ( 1 ). Assessment of milk from infected dairy cows indicated that unpasteurized milk contained high levels of infectious influenza virus ( 2 ; L.C. Caserta et al., unpub. data, https://doi.org/10.1101/2024.05.22.595317 ). Exposure of dairy farm workers to contaminated unpasteurized milk during the milking process could lead to increased human H5 virus infections. Such infections could enable H5 viruses to adapt through viral evolution within humans and gain the capability for human-to-human transmission. Figure 1 . Illustration of milking unit surfaces tested in a study of persistence of influenza H5N1 and H1N1 viruses in unpasteurized milk. Before attaching the milking unit (claw), a dairy worker disinfects... The milking process is primarily automated and uses vacuum units, commonly referred to as clusters or claws, which are attached to the dairy cow teats to collect milk ( Figure 1 ) ( 3 ). However, several steps in the milking process require human input, including forestripping, whereby workers manually express the first 3–5 streams of milk from each teat by hand. Forestripping stimulates the teats for optimal milk letdown, improves milk quality by removing bacteria, and provides an opportunity to check for abnormal milk. The forestripping process can result in milk splatter on the floor of the milking parlor and surrounding equipment and production of milk aerosols. After forestripping, each teat is cleaned and dried by hand before the claw is installed. During milking, a flexible rubber inflation liner housed within the stainless-steel shell of the claw opens to enable the flow of milk and closes to exert pressure on the teat to stop the flow of milk ( Figure 1 ). When the flow of milk decreases to a specific level, the claw automatically releases ( 3 ), at which point residual milk in the inflation liner could spray onto dairy workers, equipment, or the surrounding area. Of note, milking often takes place at human eye level; the human workspace is physically lower than the cows, which increases the potential for infectious milk to contact human workers’ mucus membranes. No eye or respiratory protection is currently required for dairy farm workers, but recommendations have been released ( 4 ). Influenza virus persistence in unpasteurized milk on surfaces is unclear, but information on virus persistence is critical to understanding viral exposure risk to dairy workers during the milking process. Therefore, we analyzed the persistence of infectious influenza viruses in unpasteurized milk on surfaces commonly found in milking units, such as rubber inflation liners and stainless steel ( Figure 1 ). For infectious strains, we used influenza A(H5N1) strain A/dairy cattle/TX/8749001/2024 or a surrogate influenza A(H1N1)pdm09 pandemic influenza virus strain, A/California/07/2009. We diluted virus 1:10 in raw unpasteurized milk and in phosphate-buffered saline (PBS) as a control. As described in prior studies ( 5 – 7 ), we pipetted small droplets of diluted virus in milk or PBS onto either stainless steel or rubber inflation liner coupons inside an environmental chamber. We then collected virus samples immediately (time 0) or after 1, 3, or 5 hours to detect infectious virus by endpoint titration using a 50% tissue culture infectious dose assay ( 7 ). To mimic environmental conditions within open-air milking parlors in the Texas panhandle during March–April 2024, when the virus was detected in dairy herds, we conducted persistence studies using 70% relative humidity. Figure 2 . Viral titers in a study of persistence of influenza H5N1 and H1N1 viruses in unpasteurized milk on milking unit surfaces. A) Viral titers of bovine A(H5N1) virus diluted 1:10 in... We observed that the H5N1 cattle virus remained infectious in unpasteurized milk on stainless steel and rubber inflation lining after 1 hour, whereas infectious virus in PBS fell to below the limit of detection after 1 hour ( Figure 2 , panel A). That finding indicates that unpasteurized milk containing H5N1 virus remains infectious on materials within the milking unit. To assess whether a less pathogenic influenza virus could be used as a surrogate to study viral persistence on milking unit materials, we compared viral decay between H5N1 and H1N1 in raw milk over 1 hour on rubber inflation liner and stainless-steel surfaces ( Figure 2 , panel B). The 2 viruses had similar decay rates on both surfaces, suggesting that H1N1 can be used as a surrogate for H5N1 cattle virus in studies of viral persistence in raw milk. Further experiments examining H1N1 infectiousness over longer periods revealed viral persistence in unpasteurized milk on rubber inflation liner for at least 3 hours and on stainless steel for at least 1 hour ( Figure 2 , panel C). Those results indicate that influenza virus is stable in unpasteurized milk and that influenza A virus deposited on milking equipment could remain infectious for >3 hours. Taken together, our data provide compelling evidence that dairy farm workers are at risk for infection with H5N1 virus from surfaces contaminated during the milking process. To reduce H5N1 virus spillover from dairy cows to humans, farms should implement use of personal protective equipment, such as face shields, masks, and eye protection, for workers during milking. In addition, contaminated rubber inflation liners could be responsible for the cattle-to-cattle spread observed on dairy farms. Sanitizing the liners after milking each cow could reduce influenza virus spread between animals on farms and help curb the current outbreak. Dr. Le Sage is a research assistant professor at the University of Pittsburgh Center for Vaccine Research, Pittsburgh, Pennsylvania, USA. Her research interests include elucidating the requirements for influenza virus transmission and assessing the pandemic potential of emerging influenza viruses. AcknowledgmentsWe thank the Lakdawala lab members, Centers of Excellence for Influenza Research and Response (CEIRR) risk assessment pipeline meeting attendees, Rachel Duron, and Linsey Marr for useful feedback. This project was funded in part with federal funds from the National Institute of Allergy and Infectious Diseases, National Institutes of Health, Department of Health and Human Services, under contract no. 75N93021C00015 and a National Institutes of Health award (no. UC7AI180311) from the National Institute of Allergy and Infectious Diseases supporting the operations of the University of Pittsburgh Regional Biocontainment Laboratory in the Center for Vaccine Research. H5N1 studies were performed in accordance with select agent permit no. 20230320-074008 at the University of Pittsburgh. This article was preprinted at https://www.medrxiv.org/content/10.1101/2024.05.22.24307745v1 . - Centers for Disease Control and Prevention . H5N1 bird flu: current situation summary [ cited 2024 Jun 13 ]. https://www.cdc.gov/flu/avianflu/avian-flu-summary.htm
- Burrough ER , Magstadt DR , Petersen B , Timmermans SJ , Gauger PC , Zhang J , et al. Highly pathogenic avian influenza A(H5N1) clade 2.3.4.4b virus infection in domestic dairy cattle and cats, United States, 2024. Emerg Infect Dis . 2024 ; 30 : 1335 – 43 . DOI PubMed Google Scholar
- Odorčić M , Rasmussen MD , Paulrud CO , Bruckmaier RM . Review: Milking machine settings, teat condition and milking efficiency in dairy cows. Animal . 2019 ; 13 ( S1 ): s94 – 9 . DOI PubMed Google Scholar
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- Qian Z , Morris DH , Avery A , Kormuth KA , Le Sage V , Myerburg MM , et al. Variability in donor lung culture and relative humidity impact the stability of 2009 pandemic H1N1 influenza virus on nonporous surfaces. Appl Environ Microbiol . 2023 ; 89 : e0063323 . DOI PubMed Google Scholar
- Kormuth KA , Lin K , Qian Z , Myerburg MM , Marr LC , Lakdawala SS . Environmental persistence of influenza viruses is dependent upon virus type and host origin. MSphere . 2019 ; 4 : e00552 – 19 . DOI PubMed Google Scholar
- Kormuth KA , Lin K , Prussin AJ II , Vejerano EP , Tiwari AJ , Cox SS , et al. Influenza virus infectivity is retained in aerosols and droplets independent of relative humidity. J Infect Dis . 2018 ; 218 : 739 – 47 . DOI PubMed Google Scholar
- Figure 1 . Illustration of milking unit surfaces tested in a study of persistence of influenza H5N1 and H1N1 viruses in unpasteurized milk. Before attaching the milking unit (claw), a dairy worker...
- Figure 2 . Viral titers in a study of persistence of influenza H5N1 and H1N1 viruses in unpasteurized milk on milking unit surfaces. A) Viral titers of bovine A(H5N1) virus diluted 1:10...
Suggested citation for this article : Le Sage V, Campbell AJ, Reed DS, Duprex WP, Lakdawala SS. Persistence of influenza H5N1 and H1N1 viruses in unpasteurized milk on milking unit surfaces. Emerg Infect Dis. 2024 Aug [ date cited ]. https://doi.org/10.3201/eid3008.240775 DOI: 10.3201/eid3008.240775 Original Publication Date: June 24, 2024 1 These first authors contributed equally to this article. Table of Contents – Volume 30, Number 8—August 2024 EID Search Options | – Search articles by author and/or keyword. | – Search articles by the topic country. | – Search articles by article type and issue. | Please use the form below to submit correspondence to the authors or contact them at the following address: Seema Lakdawala, Emory University School of Medicine, 1510 Clifton Rd, Rm 3121 Rollins Research Center, Atlanta, GA 30322, USA Comment submitted successfully, thank you for your feedback. There was an unexpected error. Message not sent. Exit Notification / Disclaimer Policy- The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
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Metric DetailsArticle views: 1945. Data is collected weekly and does not include downloads and attachments. View data is from . What is the Altmetric Attention Score?The Altmetric Attention Score for a research output provides an indicator of the amount of attention that it has received. The score is derived from an automated algorithm, and represents a weighted count of the amount of attention Altmetric picked up for a research output. This device is too smallIf you're on a Galaxy Fold, consider unfolding your phone or viewing it in full screen to best optimize your experience. These 5 Business Types Have the Highest Odds of Success in 2024Updated June 24, 2024 - First published on June 23, 2024 By: Dana George - No business is guaranteed success, but some are in a better position than others to survive.
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- Published: 25 June 2024
Rejection in romantic relationships: Does rejection sensitivity modulate emotional responses to perceptions of negative interactions?- Marianne Richter 1 ,
- Georgia Kouri 2 ,
- Nathalie Meuwly 1 &
- Dominik Schoebi 1
BMC Psychology volume 12 , Article number: 365 ( 2024 ) Cite this article 117 Accesses Metrics details Rejection is a highly stressful experience and individuals tend to avoid it whenever possible. In intimate relationships, experiences of rejection can shape the interaction dynamics between partners. Highly rejection sensitive people fear that their romantic partner will reject them and they overreact to any ambiguous cues that might indicate rejection. Furthermore, because they focus on the threat of rejection, they may have difficulty disengaging from rejection-related emotions, persevere in a rejection-focused state and have a reduced capacity to regulate their emotions. The prolonged experience of strong negative emotions, together with maladaptive attempts to respond to rejection, may undermine key relationship maintenance processes that contribute to relationship functioning and lead to negative reciprocity in interactions. The goal of the present study was to shed light on how individuals experience rejection-related emotions and determine whether, following perceptions of negative interactions, rejection sensitivity was associated with stronger negative responses and less efficient downregulation of negative emotions. In addition, we examined whether dyadic patterns of rejection sensitivity were associated with negative emotion dynamics following perceptions of negative interactions. The participants ( N = 298) were couples experiencing the transition to parenthood. A multilevel modelling approach was used to assess the associations between rejection sensitivity, perceptions of negative interactions and emotional states. The analyses included repeated daily reports for both rejection and emotions. The results suggest that rejection sensitive individuals do not report higher negative emotions when they perceive negative interactions. Moreover, rejection sensitive men and women did not remain longer in a negative emotional state after they perceived negative interactions with their partner. Finally, when both men and women partners reported higher levels of rejection sensitivity, neither reported having higher negative emotions after experiencing negative interaction perceptions. ConclusionsOur findings provide further insights into emotional dynamics and rejection sensitivity in romantic relationships. Our results do not provide evidence for a link between rejection sensitivity and higher negative emotions or slower recovery after reports of negative interactions. If individuals suppress their emotions, they may not benefit from regulation with their partner and instead may protect themselves over their relationships. However, in this context, rejection sensitivity might also not constitute a strong predictor of daily emotion fluctuations, but other variables– such as relationship satisfaction – might. Future research may investigate emotional responses in a sample with higher levels of rejection sensitivity and use more diverse measures of perceptions of negative interactions. Peer Review reports For better or for worse, intimate relationships affect us emotionally [ 1 ]. Social rejection is also a painful interpersonal experience [ 2 , 3 ] and feeling rejected by an intimate partner may be particularly hurtful because people reveal their most vulnerable side in their intimate relationships [ 4 ]. It may not be surprising, therefore, that critical interpersonal situations with a perceived risk of rejection trigger anxiety and negative emotions. However, people likely differ in the extent to which they suffer emotionally and recover from the pain of rejection [ 2 , 5 ]. Rejection sensitive individuals are thought to be more sensitive and vigilant to rejection than other individuals [ 6 ]. On the one hand, this may contribute to their anxiety in interpersonal situations with their partner, they may perceive rejection more readily [ 6 ] and show stronger and more lasting emotional responses to negative or ambiguous interactions. On the other hand, as a self-protective strategy, these individuals may become less emotionally involved with their partners, which limits the risk of acute rejection experiences [ 7 ]. Identification of such tendencies is important, as they may undermine lasting closeness and intimacy [ 8 , 9 ]. The current research examined the associations between rejection sensitivity and emotional responses after potentially hurtful interpersonal situations. Perceptions of rejection in romantic relationshipsRejection experiences can be highly subjective and involve the interpretation of social cues. They may therefore arise in diverse interpersonal situations, such as perceiving a lack of support when support is expected, or experiencing unresponsive behaviours or disinterest from the partner [ 10 ]. For instance, self-report perceptions that the partner acted in a hurtful way, was critical or unpleasant, have been used as proxies for rejection-related events [ 10 , 11 ]. Therefore, conflicts and tense interpersonal situations, as well as other situations where loyalty, support, approval, or validation are expected from a partner, bear the potential to make an individual feel threatened and rejected [ 2 , 11 ]. Because experiencing unconditional acceptance from a close partner is a basis for feeling validated, supported and understood [ 12 ], rejection cues are hurtful and undermine intimacy [ 4 ]. People are therefore motivated to try and avoid or prevent such experiences [ 13 , 14 ] and are likely to show strong affective reactions if they occur [ 15 , 16 ]. Rejection sensitivity and emotional responses to perceived rejectionBecause perceived rejection jeopardises an individual’s sense of acceptance, it triggers negative emotions and motivates regulatory behaviours to help them cope with the threat and restore acceptance [ 15 , 17 , 18 ]. Indeed, experimental manipulations of rejection cause individuals to experience more intense sadness and hurt feelings [ 18 ]. These emotional responses accompany negative behavioural responses, which may prolong negative interactions and interfere with the downregulation of negativity. For example, situations that elicit jealousy are perceived as rejecting and not only foster anger and fear but can also prompt aggressive behaviours [ 19 , 20 , 21 ]. In intimate relationships, rejection sensitive individuals tend to anxiously expect rejection from their partner and therefore readily perceive ambiguous cues as rejection [ 6 ]. High levels of rejection sensitivity have been linked to higher levels of emotional or behavioural dysregulation, and insecure attachment [ 6 , 22 , 23 ]. Rejection sensitive individuals often react strongly to ambiguous situations by providing diminished emotional support or they respond with maladaptive behaviours, such as controlling and self-silencing behaviours [ 6 , 24 , 25 ]. They may have learnt that seeking support or acceptance from a significant other may lead to rejection [ 6 ]; hence, anxious expectations of rejection foster hypervigilance to rejection-related cues. As a result, rather than being responsive and supportive, rejection sensitive individuals are prone to show defensive and self-protective behaviours in critical relational situations [ 6 ]. In turn, their partners may reciprocate their negative behaviours, which ultimately results in prolonged interpersonal distress [ 7 ]. The disposition to be sensitive to negative cues and respond to them with negative emotions and/or defensive or hostile behaviour is likely to increase difficulties with emotion regulation and adjustment in intimate relationships [ 1 , 26 ]. Consequently, negative emotional states may persist over time. For example, rejection sensitive students in committed relationships show more emotional distance from their partner, and in turn, are more dissatisfied in their close relationships [ 6 , 27 ]. Rejection sensitivity is also associated with increased reciprocation of the partner’s behaviours and attitudes. While rejection sensitive individuals are warm in response to their partner’s positive affect, they are distant and cold toward a partner’s negative affect. Importantly, when a significant other is distressed, rejection sensitive individuals fail to respond with warmth [ 28 ]. In a similar vein, anxious and avoidant attachment orientations are associated with reactions to rejection, although in different ways; whereas anxious individuals show more personal distress and guilt in response to rejection, avoidant individuals tend to respond with greater hostility or emotional suppression [ 11 , 29 ]. It is important to consider these contrasting differences when individuals are faced with rejection or are more sensitive to threatening interactions with their partners. It is also possible that rejection sensitive individuals try to prevent negative emotional states that result from expected rejection. For example, they may avoid intimacy and closeness situations because they involve the risk of feeling rejected [ 7 ] and the negative affective experiences associated with rejection. Hence, keeping emotional distance from the partner and disconnecting from rejection-related emotions may appear as a viable strategy to reduce the experience of rejection [ 25 , 27 ]. Rejection sensitive individuals, like those with an avoidant attachment style or individuals with low self-esteem, may prefer to maintain a sense of safety by reducing their closeness to significant others [ 4 , 7 , 20 ]. The risk regulation model [ 4 , 30 , 31 ] offers an interesting framework to better understand partner interactions. The model explains how in interdependent relationships, individuals must take risks and show themselves as vulnerable to fulfil their need for connectedness and closeness to their partners. Accordingly, if an individual evaluates a situation as safe and their partner as accepting and responsive to their needs, they tend to choose self-disclosure over distancing. However, if they doubt that their partner will be responsive, they prefer self-protective behaviours over self-disclosure and connection [ 32 ] If individuals are prone to perceive rejection, they are likely to behave in self-protecting ways even in situations that harbour no objective threat [ 25 ]. As a result, they are likely to miss opportunities for building and maintaining intimate bonds with their partner and instead worry about rejection. This may further contribute to their emotional instability and impaired interpersonal adjustment [ 1 , 33 ], potentially prolonging their negative emotional response to rejection. Taken together, negative emotional and behavioural responses to perceived rejection are likely to trigger further cues of rejection from the partner [ 28 , 34 ]. These responses may interfere with the downregulation of negative emotions and interpersonal adjustment [ 5 , 6 ]. Therefore, rejection sensitive individuals may focus more persistently on and perceive threat cues from their partner, thus remaining in a negative emotional state for longer. Dyadic patterns of rejection sensitivity and negative emotions in interpersonal interactionsRejection sensitive people may find it difficult to disengage from rejection-related emotions and thoughts in the face of tense or ambiguous interactions with their partner. They may respond in maladaptive ways to the rejection cues they perceive from their partner, which fosters continued distressing interactions [ 5 ]. Arguably, if we assume that rejection sensitive individuals show stronger emotional reactivity to negative or ambiguous cues from their partner, then having a partner who tends to show accommodating behaviour will dampen further negative responses. However, having a rejection sensitive partner who is susceptible to showing negative reactions to negative or ambiguous cues will amplify the negativity. Thus, if both partners are prone to perceiving rejection and reacting negatively to such perceptions [ 5 , 34 ], a negative feedback loop may occur, with both partners reciprocating each other’s negative affective responses. Similar effects of dyadic patterns between partners have been examined regarding the associations between attachment orientation and communication [ 35 ] and between attachment and coregulation of affect [ 36 ]. Specifically, a study of avoidance-oriented individuals showed that they were more likely to communicate in a negative way if their partner also displayed negative communication behaviours [ 37 ]. To our knowledge, no studies have investigated the effects of dyadic patterns of rejection sensitivity, even though it seems plausible that a partner’s response tendencies are relevant to the outcomes of interactions. Investigating dyadic effects may therefore contribute to our understanding of the role of rejection sensitivity in intimate interaction dynamics. Therefore, along with a reduced capacity to regulate emotions [ 13 ], we would expect that elevated rejection sensitivity in both partners would give rise to increased negative reciprocal dynamics in distressing interactions and contribute to more prolonged negativity. In contrast, in couples where only one partner shows elevated rejection sensitivity, these dynamics and emotional responses might be still present but less pronounced, because the other partner may buffer the negativity during dyadic interactions. The current studyIn the current study, we examined emotional responses to perceptions of negative interactions, including rejection or disregard from a romantic partner. We tested the individual and dyadic effects of rejection sensitivity on emotional change associated with or subsequent to negative interactions. Specifically, we expected that, when perceiving negative interactions, rejection sensitive individuals would report stronger increases in negative emotions than individuals low in rejection sensitivity (Hypothesis 1; H1). Furthermore, we expected that rejection sensitive individuals would show a less rapid downregulation of negative emotions (Hypothesis 2; H2). Footnote 1 Finally, we expected that dyadic patterns (combinations) of rejection sensitivity would predict increased negative emotions following perceptions of negative interactions, above and beyond the rejection sensitivity of the two partners (Hypothesis 3; H3). We expected that mutually high levels of rejection sensitivity in both partners would be associated with stronger negative emotions (Hypothesis 3a; H3a), and a reduced downregulation of negative emotions over time (Hypothesis 3b; H3b), than in dyadic patterns of one partner or none of the partners being high in rejection sensitivity. Footnote 2 Because rejection sensitivity has been associated with marital dissatisfaction in both rejection sensitive individuals and their partners [ 6 ] we included relationship satisfaction as a control variable. To test our hypotheses, we used data from the first measurement in a project on couples’ transition to parenthood, collected before the birth of their child. The present study was preregistered (during data collection) on the open science platform osf.io ( https://osf.io/wyz4r ). To assess emotion dynamics and rejection, we used an ecological momentary assessment approach in that the participants reported their daily experiences and emotional states four times per day over seven consecutive days. These data allowed us to model within-person variability of emotional states and trends of within-person emotional change over time, as associated with negative interpersonal interactions and rejection sensitivity, using a multilevel modelling approach. Materials and methodsParticipants. Participating couples were recruited during the second or third trimester of their first pregnancy, and data collection took place in the second or third trimester of pregnancy (further measurements, which were not included in this current study, were taken at six, 12 and 18 months after birth). Recruitment began in March 2019 and ended in February 2022. The inclusion criteria included being in a mixed-gender relationship, being fluent in one of the study languages (German or French), being over 18 years old, living in a shared household with their partner, and expecting their first child. Each couple was compensated with the equivalent of approximately 900 USD for participation in all parts of the study. The participants were recruited via flyers through midwives, gynaecologists, birth centres and prenatal courses, as well as via social media and word-of-mouth. Additionally, posters were distributed in universities, pharmacies, supermarkets, and hospitals. Potential participants could contact the study team via email or phone to obtain more information about the study. They were provided with a detailed information sheet and had the opportunity to ask questions and further discuss their potential participation in the study with a researcher on the phone. Both partners were required to provide consent to participate in the study. By December 2021, 149 couples ( N = 298 participants) had completed the first part of the couples’ transition to parenthood study, and their data were used for the current study. The average age was 31.55 years ( SD = 3.67) for women and 33.20 years ( SD = 4.06) for men. At the time of recruitment, couples had been in a relationship for an average of 6.73 years ( SD = 3.01). The participants reported a relatively high level of education, with 65.6% of the sample holding a university degree, 11.9% had another type of advanced education/training, 10.3% had completed an apprenticeship, 5.6% were undergraduate students, 5% had completed high school, and 1.7% had a secondary school degree. At the time of data collection, 70.9% of the sample were employed, 9.6% were executive employees or in a managerial position, 10.9% were self-employed, and 8.6% were not working. The median individual net income was the equivalent of approximately 5600 USD. All the couples completed the first set of assessments in the second or third trimester of pregnancy. All the participants were informed about the nature of the procedure and both partners provided informed consent before data collection began. The data used in the present study were collected as part of an online questionnaire completed after enrolment in the study, and a seven-day smartphone-based momentary assessment that began after the participants completed the online questionnaire. The online questionnaire included questions about the participants’ relationship and their mental health and well-being. Ecological momentary assessments were prompted four times per day (8:00 a.m., 12:00 p.m., 6:00 p.m. and 9:30 p.m.) over seven consecutive days. Both partners were prompted to complete the assessment at the same time. Adherence was good ( M = 26.7 reports per week out of a maximum of 28 reports; 4.52% missing data). The momentary assessment included questions about the participant’s daily interactions with their partner, their own and their partner’s affect, interpersonal behaviours, stress, perceptions of negative interactions, intimacy, and relationship satisfaction. Other assessments in the main study included a mental health diagnostic interview, home visits with interaction tasks, and physiological measures during the home visits and on three consecutive days of their daily lives (cortisol and heart rate frequency); these data were not part of the current study. The project obtained approval from the ethics review board of the regional government. Adult rejection sensitivityRejection sensitivity was measured using the Adult Rejection Sensitivity Questionnaire (A-RSQ; [ 25 , 38 , 39 ], a revised version of the Rejection Sensitivity Questionnaire [ 6 ]. Participants were presented with vignettes of nine different situations in which rejection might be possible (e.g. “After a bitter argument, you call or approach your significant other because you want to make up.”). Two items with a 6-point response scale were used to assess participants’ perceptions of each situation: (1) the likelihood of rejection (1 = very unlikely ; 6 = very likely ); (2) the degree of concern regarding the possible outcome of each situation (1 = unconcerned ; 6 = very concerned ). Following the recommendations of the original measure, we multiplied the concern ratings by the expectancy ratings for each situation and averaged the scores. The internal consistency was high (α = 0.81) for the concern scale and moderate for the expectancy scale (α = 0.71). Affect. At each of the 28 reports, participants were asked how they felt “in the moment” and had to answer the question by reporting on four different descriptors of negative affective states: “irritated”, “lonely”, “depressed”, and “worried”. For each descriptor, participants reported how they felt on a 10-point scale (1 = not at all ; 10 = very ). The four negative item reports were averaged to obtain a negative affect score. Using McDonald’s omega, the internal consistency for negative affect was satisfactory for both the women (within: ω = 0.67; between: ω = 0.86) and the men (within: ω = 0.68; between: ω = 0.89). Perceptions of negative interactionsTo build a variable that reflected perceptions of negative interpersonal interactions and disregard from the partner, we used momentary reports on a variety of interpersonal experiences. Specifically, we chose assessments of situations that have been used in previous literature as indicators of potential rejection from a significant other [ 6 , 31 , 40 ]. Two questions directly assessed whether participants felt [ 1 ] rejected and [ 2 ] mistreated by their partner in the last hour, using a 10-point scale (1 = not at all ; 10 = very ). We also included another variable that reflected the perception of the partner as being distant in the relationship (“During our last contact, my partner was aloof.”). We then computed a mean of the three items; this represented perceptions of negative interactions with the partner. Higher scores indicated more negative perceptions of negative interactions. Internal consistency was satisfactory for women (within: ω = 0.68; between: ω = 0.89) and men (within: ω = 0.73; between: ω = 0.96). Overall, out of all the participant’s daily reports, 23.6% were reports of perceptions of negative interpersonal interactions; this represented 1892 reports out of a potential total of 6128 reports. We centred this variable at the person mean to reflect within-person variability in perceptions of negative interactions. Relationship satisfactionParticipants rated their satisfaction with their relationship each day with a single item (“At the moment, I feel satisfied in my relationship.”) on a 10-point scale (1 = not at all ; 10 = extremely ). Higher scores indicated higher satisfaction with the relationship. We computed a single score per person, averaged across all ratings, and centred this variable at the grand mean. We tested this variable as a control variable alongside rejection sensitivity. The current study included dyadic data that featured repeated measures. We used a multilevel modelling approach to model the non-independence of emotional states at the within- and between-person levels [ 41 ], testing equations that included separate coefficients for the two partners in the couple. Because our sample included mixed-gender couples, dyad members were distinguishable by their reported gender [ 42 ]. Daily reports of both partners (Level 1) were modelled as nested within couples (Level 2), while the women and men partners were represented by separate coefficients in the equation. The effects of perceptions of negative interactions (Level 1 predictor) were estimated at the within-couple level. At this level, we only examined actor effects (H1 and H2), with participants’ own reported perceptions of negative interactions predicting their ratings of negative emotions at the same time points (for H1) and at two subsequent time points (for H2). The effects of rejection sensitivity (Level 2 predictor) were modelled at the between-person level, along with the control variables (i.e. average negative emotions and relationship satisfaction). For H3a and H3b, we also examined partner effects, testing whether the participants’ rejection sensitivity predicted their partners’ ratings of negative emotions. All the variables entered at Level 2 were centred at the grand mean. H1 was tested based on Eq. 1 (for clarity, Eq. 1 does not display the parameters for relationship satisfaction, which we incorporated alongside rejection sensitivity): Negative emotions tj represent the current report of negative emotions from one participant i (man or woman) at time t . The estimate b 0j reflects the mean level of a participant’s report of negative emotions when all other predictors are held constant. The estimate for b 1j reflects the within-subject actor effect of perceptions of a participant i at time t ; that is, the association between the perceived negative interactions of a person with their own negative emotions. The estimate b 2j reflects the between-subject actor effect of rejection sensitivity of participant i. The estimate for b 3j reflects the interaction effect of a participant’s rejection sensitivity and their own perception of negative interactions at time t . This estimate represents a cross-level interaction and can be interpreted as the moderator effect of rejection sensitivity on the effect of participant’s perceived rejection on their negative emotions. The estimate b 4j captures the extent to which the current emotion report is predicted by the prior emotion report (the autocorrelation). Controlling for the prior emotion report renders the outcome interpretable as a change score. The error term r tj reflects the residual variance. For the H1, H3a and H3b models, we estimated random intercepts and random slopes. For H2, because there was no convergence, we did not estimate random slopes. To test whether negative emotional states decreased more slowly in rejection sensitive individuals than in their less rejection sensitive counterparts (H2), we examined whether rejection sensitivity was associated with negative emotion trends in the hours after the perception of a negative interaction. To this end, we analysed data from the time points where negative interactions were reported as well as the two subsequent reports. This allowed us to estimate a linear slope that reflected a linear negative emotion trend over three time points at Level 1, starting at the time of perceived negative interaction. These trends were estimated using a trend variable that was coded to indicate the temporal sequence of reports after the negative interaction perception (0 = negative interaction; 1 and 2 for the two subsequent reports, respectively). In this model, the intercept captured the negative affect at the report of a perception of a negative interaction, and the estimate for the trend variable captured the linear trend of negative emotional states after the perception of a negative interaction. Finally, we added the interaction term between the participant’s rejection sensitivity score and the trend variable. The estimate for the interaction term reflected the degree to which participants’ degree of linear change in negative emotional states after perceiving rejection differed as a function of their level of rejection sensitivity. Finally, to test whether dyadic patterns of rejection sensitivity might be predictive of stronger negative emotional states following rejection-related perceptions (H3a, H3b), we extended the models at Level 2 by including the partner’s rejection sensitivity and the interaction term between both partners’ rejection sensitivity scores as well as the participant’s own rejection sensitivity variable. To examine the effect of individual and dyadic rejection sensitivity on emotional responses to and emotional dynamics after perceived rejection, we estimated the effects of the cross-level interaction terms between rejection sensitivity predictors and the perceived rejection parameter (H3a), or the linear time trends (H3b). For all the hypothesis tests, we also controlled for relationship satisfaction. However, the H3b model did not include the interaction terms due to lack of convergence. To ensure that our results could be discussed in the light of possible gender differences, we tested and compared a model that distinguished between partners against a model that did not distinguish between partners [ 43 ]. Because a significantly better fit resulted for the models that distinguished the partners by gender, these are the results we present in this paper (model for H1: X 2 (25) = 595.89, p < .001; model for H2: X 2 (8) = 215.23, p < .001; model for H3a: X 2 (16) = 649.51, p < .001; model for H3b: X 2 (15) = 255.10, p < .001). The models were run in R using the nlme [ 44 , 45 ]. The datasets generated and analysed in the current study are available in the Open Science Framework (OSF) repository, https://osf.io/az9vg/ Footnote 3 . Descriptive statisticsThe correlation matrix for the within and between subjects is presented in Table 1 . The average rejection sensitivity scores were comparable for men ( M = 5.80; SD = 2.78) and women ( M = 5.77; SD = 3.23) and the difference was not significant (paired-samples t (141) = 0.07, p = .942). The mean level of perceptions of negative interactions was M = 0.67 ( SD = 0.92) for men and M = 0.41 ( SD = 0.86) for women, and the gender difference was significant (paired-samples t (143) = 2.86, p = .005). Men and women reported slightly different levels of negative affect (men: M = 1.03; SD = 0.92; women: M = 0.85; SD = 0.90; paired-samples t (143) = 1.89, p = .061). On average, both men and women reported high levels of satisfaction with their relationship (men: M = 9.07; SD = 1.08; women: M = 9.15; SD = 0.96) and there were no significant differences between the two partners (paired-samples t (143) = –0.95; p = .345). Association of higher rejection sensitivity with stronger negative affectFor H1, we examined whether individuals higher in rejection sensitivity experienced higher negative emotions when perceiving negative interactions, compared to less rejection sensitive individuals. As shown in Table 2 , when perceiving negative interactions, we found a significant increase in both men’s and women’s negative affect (men: b = 0.193, p < .001; women: b = 0.358, p < .001). However, when reporting perceptions of negative interactions, rejection sensitivity in both men and women was not associated with changes in negative emotional states since the prior report of affect (men: b = –0.001, p = .984; women: b = –0.026, p = .125). Controlling for relationship satisfaction, higher relationship satisfaction predicted lower negative emotions for both women ( b = –0.213; p < .001) and men ( b = –0.451; p < .001). Moreover, when reporting perceptions of negative interactions, men with higher levels of relationship satisfaction reported lower levels of negative emotions ( b = –0.062; p = .010), but this was not the case for women ( b = –0.061; p = .195). In H2, we expected that following perceptions of negative interactions from the partner, high rejection sensitive individuals would show a slower decrease in negative emotions than their less rejection sensitive counterparts. The results are presented in Table 3 . Rejection sensitivity was not associated with the degree to which individuals recovered from their negative emotions after perceiving negative interactions (men: b = –0.026, p = .159; women: b = 0.006, p = .685). Moreover, for men, the recovery of negative emotion after perceiving negative interactions was dependent on relationship satisfaction ( b = –0.112, p = .009). Dyadic patterns of rejection sensitivity and modulation of negative affectTo examine H3a, we tested whether dyadic patterns of rejection sensitivity were associated with stronger negative emotions after perceptions of negative interactions (see Table 4 ). Specifically, we expected that mutually high rejection sensitivity would be associated with more negative affect in partners compared to when only one or none of the partners scored relatively high in rejection sensitivity. We propose that the three-way interaction between both partners’ rejection sensitivity and perceptions of negative interactions captures the extent to which the dyadic rejection sensitivity scores explain the additional variance in perceptions of negative interactions that predict negative emotions, over and above the partners’ own rejection sensitivity scores. Testing this interaction indicated that the combination of partners’ rejection sensitivity did not explain the between-person differences in negative emotional states when reporting perceptions of negative interactions (men: b = –0.001, p = .965; women: b = 0.001, p = .947). Next, we examined whether negative emotion trends after perceptions of negative interactions were associated with dyadic rejection sensitivity patterns (H3b). The results are presented in Table 5 . We propose that the interaction between both partners’ rejection sensitivity scores and recovery captures the effects of the dyadic combination of rejection sensitivity scores and emotional recovery after reports of negative interactions, beyond individual rejection sensitivity scores. Testing this did not confirm our expectations; dyadic patterns of rejection sensitivity did not explain the variance in trends of negative emotional states after perceptions of negative interactions for women ( b = –0.006, p = .327) or men ( b = –0.003, p = .622). That is, both rejection sensitive individuals and their rejection sensitive partners did not show a slower recovery of negative emotions after perceiving rejection. The current study aimed to investigate whether individuals’ rejection sensitivity and dyadic patterns of rejection sensitivity were associated with higher and persistent emotional responses in the context of daily perceptions of negative interactions. H1 predicted that when perceiving negative interactions, individuals with higher levels of rejection sensitivity would report more negative affect than their less rejection sensitive counterparts. The results did not support this hypothesis for either men or women. First, the data showed a strong positive association between perceptions of negative interactions and elevated negative emotional states, suggesting that individuals reported stronger negative emotional states when they reported perceptions of negative interactions compared to when they reported no perceptions of negative interactions, which is in line with the results of previous studies [ 18 , 21 ]. However, the results suggest that individual differences in the strength of this effect were not attributable to differential levels of rejection sensitivity. In other words, individuals with higher levels of rejection sensitivity did not report stronger negative emotions when they perceived rejection from their partner. Moreover, H2 predicted that following perceptions of negative interactions, rejection sensitive individuals would recover less rapidly from these perceptions, as reflected in a slower decrease in negative emotions. The data did not support this prediction; rejection sensitive individuals did not differ significantly in their emotional recovery compared to less rejection sensitive individuals. There are several possible reasons for the absence of rejection sensitivity effects on emotional responses and recovery. First, the items used to reflect perceptions of negative interactions might not point to situations that are challenging enough to reveal rejection sensitivity effects. The literature suggests that individuals may be sensitive to rejection in specific situations. For instance, men tend to perceive rejection in conflictual situations or in situations that threaten their status [ 3 ] whereas for women, perceptions of negative interactions occur when they perceive their partner to be inattentive [ 46 ]. Moreover, rejection sensitivity in men has been associated with heightened jealousy and controlling behaviours after rejection [ 6 ] and aggression [ 46 , 47 ]. Rejection sensitive women are less supportive, distance themselves and tend to conform to maintain their relationship [ 6 , 27 , 40 ]. These contrasting differences in men’s and women’s perceptions of rejection and their responses to them may be reflected in our results. Indeed, the questionnaire items we used reflected subjective perceptions of negative interactions and were quite broad to specifically capture an interaction where rejection might have occurred. In our sample, the emotions of both high rejection sensitive men and women were not affected by their perceptions of negative interactions. It may be that the questionnaire items did not represent threatening interactions that were sufficient to trigger stronger negative emotions. Alternatively, the participants might not have felt prompted to respond in self-protective ways or to seek closeness with their partner [ 4 ], and this may have been reflected in the absence of stronger emotional responses and slower downregulation. It is also possible that rejection sensitive individuals respond to perceptions of threatening interactions by attempting to reduce emotional arousal, thus suppressing their emotions to avoid being hurt and to protect themselves and their relationship [ 25 , 40 ]. However, by engaging in such behaviours and choosing distance over closeness [ 4 ], such individuals may not benefit from their partner’s help in regulating their negative emotions [ 1 ]. In particular, if individuals feel chronically undervalued [ 7 ], these patterns may regularly repeat and accumulate. In addition, similarly to individuals with avoidance attachment orientation [ 20 , 48 ], through interactions with their partner, a rejection sensitive person may have learned to divert their attention away from such threats. As a result, they may not show or report distress when faced with potential rejection [ 25 ]. H3a and H3b predicted dyadic effects of rejection sensitivity, expecting that when both partners are highly rejection sensitive, they experience stronger negative emotions compared to when only one or none of the partners have higher levels of rejection sensitivity. We also expected that when both partners were rejection sensitive, they would remain longer in a negative emotional state related to rejection. This assumption was based on the reasoning that mutual sensitivity to rejection enhances negative reciprocal dynamics between partners, and thus increases response intensity and prolongs negative emotional states. However, our results showed that neither women nor men with higher levels of rejection sensitivity reported stronger negative emotional responses to perceived negative interactions when their partner was also rejection sensitive. Furthermore, neither men nor women experienced prolonged emotional states compared to when one or none of the partners were highly rejection sensitive. Our data did not show negative patterns of reciprocity between rejection sensitive partners. Research on insecure attachment, a correlate of rejection sensitivity [ 6 ], offers a possible explanation for this finding [ 29 ], suggesting that anxious-avoidant and anxious-ambivalent individuals are more likely to be rejection sensitive [ 49 ]. When faced with rejection from a significant other, individuals with an avoidant attachment style inhibit strong emotions to avoid threatening thoughts that might activate their attachment needs. Such individuals are also less likely to react with anger when they are confronted with their partner’s negative behaviour and are less distressed after a hurtful event [ 20 ]. Instead, they typically distance themselves from their partner and show more hostility [ 29 ]. Furthermore, evidence suggests that when both partners are insecure, they engage in mutual avoidance and withdraw from communication [ 35 ]. To the extent that these findings can be applied to rejection sensitivity, mutual use of avoidance strategies in couples with higher levels of rejection sensitivity in both partners could feed avoidance cycles. However, these negative dyadic dynamics are more likely to manifest in heightened avoidance [ 25 ] than in intense mutual expressions of negative emotions. If this effect was active in our study, high rejection sensitive individuals may not have reported stronger negative emotions when they perceived negative interactions. Nonetheless, they may have felt more distant, and these dynamics will still contribute to dysfunctional interactions in the long run [ 50 ]. Another possibility is that these individuals may have attempted to de-escalate negative interactions, rather than engage in emotional avoidance or disengagement. It is important to stress that these possibilities are all very speculative and that further research is needed to confirm whether they are viable explanations. Finally, when controlling for relationship satisfaction, our results showed that higher levels of relationship satisfaction in men predicted lower negative emotions, and a slower recovery from the perceived negative interactions. We did not expect these results and offer some possible explanations for them. Interestingly, while high levels of satisfaction in men predicted lower negative emotions, men recovered less quickly from these negative emotional states. A reason for these results may be that individuals highly satisfied in their relationship hold high expectations of their romantic relationship and their partner [ 51 ]. As a result, these individuals may still report negative emotion, though significantly less, but it may take them longer to recover from this emotional state. They may react with a heightened sensitivity to such interactions because they consider and care for their romantic relationship more [ 51 ]. Besides, the context may also contribute to such responses. The transition to parenthood is often depicted as a joyful period, where future parents rejoice in this common challenge [ 52 ]. Thus, partners may report higher levels of satisfaction, which would render them more sensitive to threatening interactions. In addition, disclosing emotions contribute to relationship maintenance [ 53 ], which suggest that reporting negative emotions does not point to negative relational processes. Instead, partners may need such moments to increase intimacy and to foster their relationship [ 51 ]. Additional research specifically focusing on these aspects is needed to understand the mechanisms that underlie them. How individuals respond to their partner, and their ability to regulate and recover from their emotions, plays a crucial role in relationship satisfaction and how couples deal with conflict, for example [ 54 ]. The current study has several limitations. First, high levels of rejection sensitivity were relatively rare in our sample. Therefore, most participants may be unlikely to display the strong emotional responses to negative interactions needed to reveal higher levels of rejection sensitivity. Second, the measure of rejection sensitivity was based on self-reported experiences in response to general interpersonal situations with different people. Such reports do not necessarily reflect rejection responses to everyday interactions, or in this context, to a romantic partner. Self-reports on specific daily rejection-relevant interactions with the partner may capture different types of responses that represent more immediate reactions to rejection. Moreover, the questions included in the momentary assessment did not all refer to the same time points and this may have been a source of systematic error variance. Importantly, when measuring emotions after a certain event, a three- to six-hour difference between each report might have been too wide to capture relevant emotions. Hence, further studies including a smaller time difference between each self-report questionnaire are needed to fully grasp the potential effects of rejection on emotional reactions; this would allow a more fine-grained measurement (e.g. in minutes rather than hours). Similarly, although we were primarily interested in emotion dynamics as an outcome, the distinction between soft affect (e.g. hurt, sadness) and hard affect (e.g. anger) in relation to rejection may be of interest for future research, as these affective responses may serve different social functions relevant to interpersonal interactions [ 55 ]. Whereas soft affects may reflect vulnerability and promote or facilitate affiliation, hard affects are associated with assertiveness and threat and tend to promote interpersonal distance [ 56 , 57 ]. Part of the present study examined reports of emotions and perceptions of negative interactions at the same point in time. While some useful data was obtained, this design precluded obtaining causal effects. Therefore, future studies may aim at establishing predictions of prospective change or use experimental approaches to allow for stronger causal interpretations. Finally, the couples in our sample were all expecting their first child. This situation is unique and the relationship experience of expectant couples may differ from that of other types of couples. Hence, the generalizability of our results is limited. It is unclear how this unique relationship situation may have affected our results. On the one hand, emotional responses may be different at this time. Partners may be more focused on their future child, and be more willing to override negative relational sentiments through experiences of togetherness and cooperation [ 58 , 59 , 60 ]. On the other hand, although expectant couples continue to experience common difficulties in their daily interactions [ 61 , 62 , 63 , 64 ], the period of expecting a first child is associated with adjustment difficulties and increased stress [ 65 , 66 ]. This may exacerbate relationship insecurities [ 67 ] and thus, negatively affect perceptions of the relationship [ 68 ]. Moreover, rejection sensitive individuals in committed long-term relationships may show different emotional patterns as a response to rejection compared to individuals in the early stages of a relationship, as they may have developed regulation strategies to manage their relational experiences [ 69 ]. While our results did not show an effect of rejection sensitivity on the emotion regulation capacities of individuals, therapists may nonetheless benefit from these findings. Rejection sensitive individuals are concerned about possible rejection; therefore, it might be of interest to specifically target relationship-based anxiety. For instance, a brief psychoeducational intervention has shown how behaviours such as self-silencing or partner accommodation can change significantly following intervention [ 70 ]. Moreover, emotionally focused couple therapy is associated with decreased anxious and avoidance attachment [ 71 ]. In both options, partners learn how to communicate with each other [ 70 ] and de-escalate negative interactions [ 71 ]. Such interventions might prevent the perpetuation of negative feedback cycles through both partners’ dyadic communication and understanding of each other’s experiences, especially when they are both highly sensitive to rejection. In conclusion, the current study did not fully support the notion that rejection sensitivity plays a role in modulating emotional responses and regulation following perceptions of negative interactions in intimate relationships, or that dyadic patterns of rejection modify emotional responses on a daily basis. Rejection sensitive individuals may suppress their emotions and protect themselves over their relationship, which in the long run, may be detrimental to the relationship. Additionally, the absence of emotional responses underscores the need to identify what kind of interactions may prompt negative emotions in rejection sensitive individuals. Finally, the identified association between relationship satisfaction and negative emotional responses is a new finding and a possible avenue for future research on emotion regulation and relationship outcomes. Our findings are important because they contribute to the gap in the research on daily emotional dynamics and rejection sensitivity. Rejection sensitivity emotional responses may not necessarily become more apparent in the specific rejection interactions perceptions we used. Future studies should shed more light on the relevance of rejection sensitivity for negative emotion dynamics in such relationships by focusing on samples with higher levels of rejection sensitivity and adapting diary studies to more accurately capture the possible aftermath of perceptions of negative interactions. Data availabilityThe datasets analyzed in this study are available on the OSF repository, https://osf.io/az9vg/ . Contrary to the preregistration protocol, because of a lack of coherence, we did not include Hypothesis 2b, which predicted a slower recovery of positive emotions in rejection sensitive individuals, in the current paper. The results can be found online: https://osf.io/gtj5u/ . 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Burgess Moser M, Johnson SM, Dalgleish TL, Lafontaine MF, Wiebe SA, Tasca GA. Changes in relationship-specific attachment in emotionally focused couple therapy. J Marital Fam Ther. 2016;42(2):231–45. Download references AcknowledgementsNot Applicable. The research has been supported by the grant 100014_175620 from the Swiss National Science Foundation, awarded to the last author. Author informationAuthors and affiliations. Department of Psychology, University of Fribourg, Rue de Faucigny 2, Fribourg, 1700, Switzerland Marianne Richter, Nathalie Meuwly & Dominik Schoebi Institute of Psychology, University of Lausanne, Lausanne, 1015, Switzerland Georgia Kouri You can also search for this author in PubMed Google Scholar ContributionsMR contributed to the data preparation and analysis, drafted and revised the manuscript. DS contributed to data analysis and to the drafting and revision of the manuscript. GK and NM contributed to the revision of the manuscript and made suggestions for statistical analyses and theoretical background. All authors read and approved the final manuscript. Corresponding authorCorrespondence to Marianne Richter . Ethics declarationsEthics approval and consent to participate. The data used in this study have been submitted and approved by the cantonal ethics committee in Vaud, Switzerland, the Swiss Ethics Committees on research involving humans. Informed consent was obtained from all participants of the study. This study followed the Declaration of Helsinki. Consent for publicationNot applicable as no identifying information are present in the study. Competing interestsThe authors declare no competing interests. Additional informationPublisher’s note. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. 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The Creative Commons Public Domain Dedication waiver ( http://creativecommons.org/publicdomain/zero/1.0/ ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. Reprints and permissions About this articleCite this article. Richter, M., Kouri, G., Meuwly, N. et al. Rejection in romantic relationships: Does rejection sensitivity modulate emotional responses to perceptions of negative interactions?. BMC Psychol 12 , 365 (2024). https://doi.org/10.1186/s40359-024-01864-w Download citation Received : 20 August 2023 Accepted : 19 June 2024 Published : 25 June 2024 DOI : https://doi.org/10.1186/s40359-024-01864-w Share this articleAnyone you share the following link with will be able to read this content: Sorry, a shareable link is not currently available for this article. Provided by the Springer Nature SharedIt content-sharing initiative - Rejection sensitivity
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Categorical Variable. This is a variable that can take on a limited number of values or categories. Categorical variables can be nominal or ordinal. Nominal variables have no inherent order, while ordinal variables have a natural order. Examples of categorical variables include gender, race, and educational level.
Parts of the experiment: Independent vs dependent variables. Experiments are usually designed to find out what effect one variable has on another - in our example, the effect of salt addition on plant growth.. You manipulate the independent variable (the one you think might be the cause) and then measure the dependent variable (the one you think might be the effect) to find out what this ...
Examples. Discrete variables (aka integer variables) Counts of individual items or values. Number of students in a class. Number of different tree species in a forest. Continuous variables (aka ratio variables) Measurements of continuous or non-finite values. Distance.
The Role of Variables in Research. In scientific research, variables serve several key functions: Define Relationships: Variables allow researchers to investigate the relationships between different factors and characteristics, providing insights into the underlying mechanisms that drive phenomena and outcomes. Establish Comparisons: By manipulating and comparing variables, scientists can ...
The independent variable is the cause. Its value is independent of other variables in your study. The dependent variable is the effect. Its value depends on changes in the independent variable. Example: Independent and dependent variables. You design a study to test whether changes in room temperature have an effect on math test scores.
In research, the independent variable is manipulated to observe its effect, while the dependent variable is the measured outcome. Essentially, the independent variable is the presumed cause, and the dependent variable is the observed effect. Variables provide the foundation for examining relationships, drawing conclusions, and making ...
While the independent variable is the " cause ", the dependent variable is the " effect " - or rather, the affected variable. In other words, the dependent variable is the variable that is assumed to change as a result of a change in the independent variable. Keeping with the previous example, let's look at some dependent variables ...
Examples of categorical variables include gender (male, female, other), type of vehicle (car, truck, motorcycle), or marital status (single, married, divorced). These categories help researchers organize data into groups for comparison and analysis. Categorical variables can be further classified into two subtypes: nominal and ordinal.
A variable in research simply refers to a person, place, thing, or phenomenon that you are trying to measure in some way. The best way to understand the difference between a dependent and independent variable is that the meaning of each is implied by what the words tell us about the variable you are using. You can do this with a simple exercise ...
Variables in Research. The definition of a variable in the context of a research study is some feature with the potential to change, typically one that may influence or reflect a relationship or ...
It means one level of a categorical variable cannot be considered better or greater than another level. Example: Gender, brands, colors, zip codes. The categorical variable is further categorised into three types: Type of variable. Definition. Example. Dichotomous (Binary) Variable.
The definition of a variable changes depending on the context. Typically, a letter represents them, and it stands in for a numerical value. In algebra, a variable represents an unknown value that you need to find. For mathematical functions and equations, you input their values to calculate the output. In an equation, a coefficient is a fixed ...
A variable is an attribute of an item of analysis in research. The types of variables in research can be categorized into: independent vs. dependent, or categorical vs. quantitative. The types of variables in research (correlational) can be classified into predictor or outcome variables. Other types of variables in research are confounding ...
Variables. What is a variable?[1,2] To put it in very simple terms, a variable is an entity whose value varies.A variable is an essential component of any statistical data. It is a feature of a member of a given sample or population, which is unique, and can differ in quantity or quantity from another member of the same sample or population.
Research Variables. The research variables, of any scientific experiment or research process, are factors that can be manipulated and measured. Any factor that can take on different values is a scientific variable and influences the outcome of experimental research. Gender, color and country are all perfectly acceptable variables, because they ...
Suitable statistical design represents a critical factor in permitting inferences from any research or scientific study.[1] Numerous statistical designs are implementable due to the advancement of software available for extensive data analysis.[1] Healthcare providers must possess some statistical knowledge to interpret new studies and provide up-to-date patient care. We present an overview of ...
Quantitative Variables. Quantitative variables, also called numeric variables, are those variables that are measured in terms of numbers. A simple example of a quantitative variable is a person's age. Age can take on different values because a person can be 20 years old, 35 years old, and so on.
The purpose of research is to describe and explain variance in the world, that is, variance that. occurs naturally in the world or chang e that we create due to manipulation. Variables are ...
Types. Discrete and continuous. Binary, nominal and ordinal. Researchers can further categorize quantitative variables into discrete or continuous types of variables: Discrete: Any numerical variables you can realistically count, such as the coins in your wallet or the money in your savings account.
Variables are names that are given to the variance we wish to explain. A variable is either a result of some force or is itself the force that causes a change in another variable. In experiments, these are called dependent and independent variables respectively. When a researcher gives an active drug to one group of people and a placebo , or ...
Scale variable. A scale variable is a variable that has a numeric value that can be ordered with a meaningful metric. It will be the amount or number of something. Study variable. Often referred to as a research variable, a study variable is any variable used that has some kind of cause and effect relationship. Test variable.
You can also create a mixed methods research design that has elements of both. Descriptive research vs experimental research. Descriptive research gathers data without controlling any variables, while experimental research manipulates and controls variables to determine cause and effect.
Full transcript on this video lecture is available at: https://philonotes.com/2023/03/types-of-variables-in-research-and-their-uses-2*****See also:How to For...
1. Online courses. The broad e-learning market is expected to grow from $197 billion in 2020 to $840 billion by 2030. There are some great platforms to add courses to, including Coursera and ...
We occasionally recalculate historical Zestimate values along with major data upgrades or improvements to the algorithm. These recalculations are based on a variety of considerations and, therefore, not every new algorithm release will get a corresponding update of historical values.
We use microdata on the phases of commercial construction projects to document three facts regarding time-to-plan lags: (1) plan times are long—about 1.5 years—and highly variable, (2) roughly 40 percent of projects are abandoned in planning, and (3) property price appreciation reduces the likelihood of abandonment. We construct a model with endogenous planning starts and abandonment that ...
We observed that the H5N1 cattle virus remained infectious in unpasteurized milk on stainless steel and rubber inflation lining after 1 hour, whereas infectious virus in PBS fell to below the limit of detection after 1 hour (Figure 2, panel A).That finding indicates that unpasteurized milk containing H5N1 virus remains infectious on materials within the milking unit.
Third, the explanatory variable (exogenous): (1) age is a continuous variable, unit: years. (2) Educational background is a categorical variable, 1 = primary school or below; 2 = middle school; University degree or above. (3) Marriage is a categorical variable, 0 = no partner; 1. (4) Household is a classification variable, 0 = agricultural ...
Small businesses account for 99.9% of U.S. firms. There may be no guarantees, but here are five with a better-than-average chance of success.
Future research may investigate emotional responses in a sample with higher levels of rejection sensitivity and use more diverse measures of perceptions of negative interactions. ... All the variables entered at Level 2 were centred at the grand mean. H1 was tested based on Eq. 1 (for clarity, Eq. 1 does not display the parameters for ...