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Research Methods in Psychology: Key Takeaways and Exercises

Research Methods in Psychology
Key Takeaways and Exercises

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Notes

table of contents
  1. Acknowledgements
  2. About this Book
  3. About the Authors of the Current Edition
  4. Preface
  5. The Science of Psychology
    1. Methods of Knowing
    2. Understanding Science
    3. Goals of Science
    4. Science and Common Sense
    5. Experimental and Clinical Psychologists
    6. Key Takeaways and Exercises
  6. Overview of the Scientific Method
    1. A Model of Scientific Research in Psychology
    2. Finding a Research Topic
    3. Generating Good Research Questions
    4. Developing a Hypothesis
    5. Designing a Research Study
    6. Analyzing the Data
    7. Drawing Conclusions and Reporting the Results
    8. Key Takeaways and Exercise
  7. Research Ethics
    1. Moral Foundations of Ethical Research
    2. From Moral Principles to Ethics Codes
    3. Putting Ethics Into Practice
    4. Key Takeaways and Exercises
  8. Psychological Measurement
    1. Understanding Psychological Measurement
    2. Reliability and Validity of Measurement
    3. Practical Strategies for Psychological Measurement
    4. Key Takeaways and Exercises
  9. Experimental Research
    1. Experiment Basics
    2. Experimental Design
    3. Experimentation and Validity
    4. Practical Considerations
    5. Key Takeaways and Exercises
  10. Non-Experimental Research
    1. Overview of Non-Experimental Research
    2. Correlational Research
    3. Complex Correlation
    4. Qualitative Research
    5. Observational Research
    6. Key Takeaways and Exercises
  11. Survey Research
    1. Overview of Survey Research
    2. Constructing Surveys
    3. Conducting Surveys
    4. Key Takeaways and Exercises
  12. Quasi-Experimental Research
    1. One-Group Designs
    2. Non-Equivalent Groups Designs
    3. Key Takeaways and Exercises
  13. Factorial Designs
    1. Setting Up a Factorial Experiment
    2. Interpreting the Results of a Factorial Experiment
    3. Key Takeaways and Exercises
  14. Single-Subject Research
    1. Overview of Single-Subject Research
    2. Single-Subject Research Designs
    3. The Single-Subject Versus Group “Debate”
    4. Key Takeaways and Exercises
  15. Presenting Your Research
    1. American Psychological Association (APA) Style
    2. Writing a Research Report in American Psychological Association (APA) Style
    3. Other Presentation Formats
    4. Key Takeaways and Exercises
  16. Descriptive Statistics
    1. Describing Single Variables
    2. Describing Statistical Relationships
    3. Expressing Your Results
    4. Conducting Your Analyses
    5. Key Takeaways and Exercises
  17. Inferential Statistics
    1. Understanding Null Hypothesis Testing
    2. Some Basic Null Hypothesis Tests
    3. Additional Considerations
    4. From the “Replicability Crisis” to Open Science Practices
    5. Key Takeaways and Exercises
  18. Glossary
  19. References

40

Key Takeaways and Exercises

Key Takeaways

  • Quasi-experimental research involves the manipulation of an independent variable without the random assignment of participants to conditions or counterbalancing of orders of conditions.
  • There are three types of quasi-experimental designs that are within-subjects in nature. These are the one-group posttest only design, the one-group pretest-posttest design, and the interrupted time-series design.
  • There are five types of quasi-experimental designs that are between-subjects in nature. These are the posttest only design with nonequivalent groups, the pretest-posttest design with nonequivalent groups, the interrupted time-series design with nonequivalent groups, the pretest-posttest design with switching replication, and the switching replication with treatment removal design.
  • Quasi-experimental research eliminates the directionality problem because it involves the manipulation of the independent variable. However, it does not eliminate the problem of confounding variables, because it does not involve random assignment to conditions or counterbalancing. For these reasons, quasi-experimental research is generally higher in internal validity than non-experimental studies but lower than true experiments.
  • Of all of the quasi-experimental designs, those that include a switching replication are highest in internal validity.

Exercises

  • Practice: Imagine that two professors decide to test the effect of giving daily quizzes on student performance in a statistics course. They decide that Professor A will give quizzes but Professor B will not. They will then compare the performance of students in their two sections on a common final exam. List five other variables that might differ between the two sections that could affect the results.
  • Discussion: Imagine that a group of obese children is recruited for a study in which their weight is measured, then they participate for 3 months in a program that encourages them to be more active, and finally their weight is measured again. Explain how each of the following might affect the results:
    • regression to the mean
    • spontaneous remission
    • history
    • maturation

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Copyright © 2019

                                by Rajiv S. Jhangiani, I-Chant A. Chiang, Carrie Cuttler, & Dana C. Leighton

            Research Methods in Psychology by Rajiv S. Jhangiani, I-Chant A. Chiang, Carrie Cuttler, & Dana C. Leighton is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.
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