Research methods independent vs dependent variables exam review
This exam review covers the distinctions between independent and dependent variables in research methods, providing clear definitions, examples, and implications for psychology studies.
Quiz(40 questions)
1. What is the main purpose of an independent variable in an experiment?
Terms in this Study Set(40)
Flashcards 1(20)
What is an independent variable?
The variable that is manipulated or changed. Example: Amount of study time.
What is a dependent variable?
The variable that is measured or observed. Example: Test scores.
True or False: The independent variable affects the dependent variable.
True - The independent variable's manipulation is expected to influence the dependent variable.
How to identify an independent variable?
Ask: What am I changing? Example: Different amounts of sleep.
Fill in the blank: The ______ variable is tested and measured in an experiment.
dependent
Cause → Effect: Studying longer hours → ?
Higher test scores
Comparison: Independent variable vs. Dependent variable.
- Independent: Controlled by researcher - Dependent: Responds to changes
What is a control variable?
A variable kept constant to prevent influence. Example: Same testing environment.
What does a hypothesis state?
A predicted relationship between independent and dependent variables. Example: More sleep improves test scores.
True or False: All variables in an experiment should be independent.
False - Only one independent variable is tested to measure its effect on the dependent variable.
Define operational definition.
A clear, precise definition of how variables are measured. Example: Sleep measured in hours.
How can you test your hypothesis?
Conduct an experiment with controlled independent and dependent variables.
What is a confounding variable?
An outside influence that affects the dependent variable. Example: Test anxiety.
Fill in the blank: If the independent variable increases, the dependent variable may __________.
increase or decrease
Short example: Define independent variable in a diet study.
Type of diet (low-carb vs. low-fat) is the independent variable.
What role do control groups play?
Control groups provide a baseline to compare results against the experimental group.
True or False: A dependent variable can be manipulated.
False - Dependent variables are observed, not manipulated.
What is a theory?
A well-substantiated explanation of an aspect of the natural world, based on a body of evidence.
Comparison: Quantitative vs. Qualitative research.
- Quantitative: Numerical data - Qualitative: Descriptive data
What is a random assignment?
Randomly placing participants into groups to reduce bias.
Flashcards 2(20)
Define independent variable.
The independent variable is manipulated by the researcher to observe its effect on the dependent variable.
Define dependent variable.
The dependent variable is measured in the experiment; its changes depend on the independent variable.
True or False: The independent variable affects the dependent variable.
True. The independent variable is the cause that influences the outcome measured as the dependent variable.
Give an example of an independent variable.
Amount of study time (hours) in a test score study.
Give an example of a dependent variable.
Test scores (percentage) influenced by study time.
Fill in the blank: The __________ variable is manipulated in an experiment.
independent
Comparison: Independent vs. Dependent Variables.
Independent: manipulated; Dependent: measured outcome.
Cause → Effect: Increasing study time affects...
...the test scores of students positively.
What happens to the dependent variable when the independent variable increases?
It typically changes; often increases or decreases based on the relationship.
True or False: All variables in an experiment are independent.
False. There are independent and dependent variables which have different roles.
How to identify the independent variable in a study?
Look for what is being changed or controlled by researchers.
How to identify the dependent variable in a study?
Look for what is being measured or observed.
What is the relationship between independent and dependent variables?
The independent variable is the cause, and the dependent variable is the effect.
Example of a research hypothesis involving variables.
Increasing sleep (independent) will improve memory recall (dependent).
What does a controlled variable mean?
A variable that is kept constant to prevent it from influencing the outcome.
List an example of a controlled variable.
Room temperature, type of test, time of day.
True or False: The dependent variable can be manipulated directly.
False. The dependent variable is measured, not manipulated.
What does operationalization mean in research?
Defining variables in measurable terms so they can be tested.
Fill in the blank: In experiments, researchers often include __________ variables to ensure accuracy.
controlled
What is the significance of random assignment in experiments?
It helps eliminate bias and ensures that groups are comparable.
Questions in this Study Set(40)
1. What is the main purpose of an independent variable in an experiment?
2. What is an independent variable?
3. In a study measuring the effect of different study techniques on test scores, what is the dependent variable?
4. Which of the following represents a dependent variable?
5. True or False: The dependent variable is what the researcher manipulates in an experiment.
6. True or False: The dependent variable is always the first variable listed in a research hypothesis.
7. Which variable is commonly kept constant to ensure an experiment is fair?
8. What happens to test scores (dependent variable) if study time (independent variable) increases?
9. Fill in the blank: The __________ variable is what the researcher measures in response to changes.
10. Which of the following is NOT an example of a controlled variable?
11. If a student studies for more hours, what might happen to their test scores?
12. What does operationalization refer to in research?
13. What is the role of a hypothesis in an experiment?
14. Which statement best describes the relationship between independent and dependent variables?
15. Which of the following is NOT a characteristic of a dependent variable?
16. What is the role of random assignment in an experiment?
17. What is a confounding variable?
18. Fill in the blank: The __________ variable depends on the changes made to the independent variable.
19. In an experiment, what does random assignment help achieve?
20. Which of the following is an example of an independent variable in a study about exercise and weight loss?
21. Which of the following best defines an operational definition?
22. What does it mean if a variable is controlled?
23. True or False: A control group is essential for comparing results against an experimental group.
24. True or False: A research hypothesis must include both independent and dependent variables.
25. In a research study, what is the independent variable if participants are testing different diets?
26. Which of the following does NOT illustrate a cause and effect relationship?
27. How does qualitative research differ from quantitative research?
28. In a study examining the effects of a new teaching method, what would be the independent variable?
29. What can be said about the relationship between independent and dependent variables?
30. Choose the correct term: The variable that is affected by the changes in the independent variable is called the __________.
31. Which of the following accurately describes a theory in research?
32. Which of the following is an example of a controlled variable in a study on sleep and academic performance?
33. If the independent variable is increased, what can happen to the dependent variable?
34. What defines a dependent variable in a psychological study?
35. Which of the following is an example of a control variable?
36. Which of the following statements about independent variables is correct?
37. In a study examining the impact of sleep on test performance, which of the following represents the independent variable?
38. In a study where researchers investigate the impact of different diets on weight loss, which of the following is the dependent variable?
39. Which of the following statements is TRUE regarding dependent variables?
40. True or False: An independent variable can be both manipulated and measured in an experiment.
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