Example of Distinguishing Correlational and Experimental Research
What defines a study as experimental or correlational is strictly how it is conducted, not the variables studied or the graphs used. For instance, in a study on daily to-do lists and stress, the design is an experiment if the researcher randomly assigned participants to make lists (manipulation), allowing for the conclusion that making lists reduces stress. However, if the researcher merely asked pre-existing groups if they make to-do lists, it is a correlational study. In the correlational case, one can only conclude the variables are statistically related, as stress might prevent planning (directionality problem) or conscientiousness might affect both (third-variable problem).
0
1
Tags
KPU
Research Methods in Psychology - 4th American Edition @ KPU
Related
Example of Distinguishing Correlational and Experimental Research
A researcher finds that people who drink more herbal tea tend to have lower stress levels. Which of the following explains why an experimental design is better suited than a correlational design for determining if the tea specifically causes the stress reduction?
A researcher finds a significant positive correlation () between the amount of time people spend on social media and their self-reported levels of loneliness. True or False: This finding alone is sufficient to conclude that social media use causes an increase in loneliness because the relationship is statistically significant.
A researcher wants to evaluate the claim that 'regular physical exercise causes an improvement in cognitive function.' Rank the following research findings based on the strength of the evidence they provide for this causal claim, ordering them from the lowest degree of causal evidence (1) to the highest degree of causal evidence (3).
In psychology research, why is experimental research uniquely able to establish cause-and-effect claims while correlational research is not?
Match each research concept with the specific role it plays in the comparison between correlational and experimental methods in psychology.
Match each term to the description that best captures its role in whether a research design can establish causation.
While correlational research can identify relationships between variables, the only type of research that can establish cause-and-effect claims is _____ research.
A developmental psychologist observes that children who own more books at home earn higher scores on standardized reading assessments. Based solely on this finding, she concludes that book ownership causes improved reading ability. True or False: This causal conclusion is justified by the data.
A researcher randomly assigns half of a sample to a daily journaling condition and the other half to a no-journaling control condition, then measures stress levels after four weeks. The key feature that allows this study to make a causal claim—unlike a correlational study that simply observes an association between journaling and stress—is that the experimental design controls for _____, thereby isolating journaling as the direct cause of any observed change in stress.
A student reads a news headline: 'Study proves that listening to classical music causes better exam performance.' Order the following evaluation steps from first (1) to last (5) to properly judge whether this causal claim is justified.
Explain the fundamental difference between correlational and experimental research in their ability to establish causation. In your answer, recall the specific design feature that enables experimental research to support cause-and-effect claims.
Based on this scenario, diagnose why the psychologist cannot conclude that making daily to-do lists causes a reduction in stress. Then, explain what changes when transitioning to an experimental design, justifying how it would allow the researcher to support a cause-and-effect claim.
A researcher discovers a statistical correlation between students' regular physical exercise and their test scores. Apply your understanding of research methods to describe what design change the researcher must implement to establish that exercise causes better test scores, and state how this design change addresses alternative explanations.
Correlational Research Techniques
Comparison of Correlational and Experimental Research in Establishing Causation
Correlation Coefficient
The Fundamental Limitation of Correlational Research: Inability to Establish Causation
Illusory Correlation: Perceiving Nonexistent Relationships
A researcher conducts a study and finds that cities with a higher number of parks per capita also have a lower rate of reported respiratory illnesses. The researcher concludes that the presence of parks causes a decrease in respiratory illness. What is the primary flaw in this conclusion based on the research method described?
A researcher conducts a large-scale survey and finds a strong positive relationship between the amount of time people spend watching news coverage of disasters and their reported levels of anxiety. Based only on this finding, which of the following is the most valid conclusion?
Example of Correlational Research: Self-Esteem and School Achievement
Using Correlation to Establish Measurement Reliability and Validity
Example of Correlational Research: Cannabis Use and Memory
Misconception About Variables in Correlational Research
Predictive Value of Correlation
Data Collection in Correlational Research
Complex Correlational Research
Dichotomizing Skewed Variables
Factor Analysis
Line Graphs in Correlational Research
Scatterplots
Usefulness of Correlational Research
Establishing Causality via Experiments
Confounding Variable
External Validity of Correlational Research
Correlational Research as Converging Evidence
Example of Correlational Research: Need for Cognition and Occupation
Example of Distinguishing Correlational and Experimental Research
Directionality Problem
Third-Variable Problem
Which of the following best describes the primary approach of correlational research?
Match each core component of correlational research with the scenario that best illustrates its role or function in a psychological study.
A researcher is investigating the relationship between 'exposure to parental conflict' and 'childhood emotional regulation.' Because it is unethical to intentionally increase conflict in a family to observe its effects on children, the researcher should apply a correlational research design to measure these variables as they naturally occur.
A researcher discovers a strong correlation between 'daily exercise' and 'mental wellbeing.' Arrange the following steps in the logical sequence of a correlational analysis, moving from the initial description of the relationship to a critical evaluation of its limits and its final application for prediction.
In correlational research, researchers can utilize a statistical technique called regression to predict scores on one variable based on the scores of another variable.
Which of the following statements best explains why a researcher would choose a correlational research design instead of an experimental design?
A researcher wants to study the potential relationship between prenatal alcohol exposure and cognitive development in children. Because it would be unethical to intentionally require pregnant participants to consume alcohol, the researcher cannot manipulate an independent variable. Given this ethical constraint, the most appropriate design is a/an _____ research design, which allows measurement of both variables and prediction of outcomes without experimental manipulation.
A researcher is designing studies on human behavior. Match each study description to the correlational research principle it best illustrates.
A student reads a published study that measured participants' daily screen time and their self-reported life satisfaction scores in a naturalistic setting. The researchers computed a correlation coefficient but never assigned participants to any screen-time condition, nor did they hold constant any outside factors. Analyzing these features, the student correctly classifies the study as non-experimental because the researchers made little to no effort to control _____ variables—the same characteristic that prevents the authors from concluding that screen time causes changes in life satisfaction.
A research team is deciding whether to use a correlational design to study the relationship between childhood poverty and adult educational attainment. Order the following evaluative criteria from the first consideration the team should address to the final justified conclusion about design choice.
Define correlational research and identify its key characteristics regarding variable manipulation and the control of extraneous variables. In addition, state the two primary scientific goals that this research strategy allows investigators to achieve, and name the specific statistical technique used to make predictions from one variable to another.
Explain why the psychologist chose a correlational research design instead of an experimental design for this study. In your explanation, identify the nature of the variables in this scenario and explain how this design helps achieve the goals of description and prediction.
A researcher wants to study the relationship between the number of hours college students work at part-time jobs and their overall GPA. Apply the principles of correlational research to explain how the researcher should collect data on these variables, and specify the statistical technique they should use to predict a student's GPA from their work hours.
Learn After
In a study examining the relationship between daily to-do lists and stress, what specific researcher action defines the design as an experiment rather than a correlational study?
A researcher is investigating the relationship between daily to-do lists and stress levels. Match each study description or challenge to the correct research design concept based on how the study is conducted.
If a researcher produces the bar graph shown in the image by asking a group of participants whether they already keep a to-do list and then measuring their stress levels, they have conducted an experimental study.
The provided bar graph shows that people who keep to-do lists have lower mean stress scores. Arrange the following steps in the correct logical order to demonstrate how a researcher would transition from this correlational observation to an experimental design that establishes a causal link by eliminating alternative explanations.
In the correlational study example involving to-do lists and stress, which term describes the possibility that a separate factor, such as conscientiousness, is the actual cause of both observed variables?
A study on the relationship between to-do lists and stress is inherently correlational because 'to-do list usage' is a pre-existing lifestyle behavior that cannot be investigated using an experimental design.
A researcher finds that participants who keep daily to-do lists have lower mean stress scores than those who do not. To evaluate whether the conclusion 'to-do lists reduce stress' is valid, one must recognize that without _____, the researcher cannot rule out pre-existing personality traits (such as conscientiousness) as the true cause of the observed difference in stress.
Apply your understanding of experimental and correlational research design by matching each scenario or interpretive challenge to the correct methodological concept.
In a study investigating daily to-do lists and stress, a researcher realizes that rather than list-making reducing stress, having high stress levels might actually prevent someone from planning and making lists. This interpretive issue is known as the _____.