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Case Study

Based on your understanding of participant variables, what is the fundamental methodological flaw in Dr. Ramirez's research design regarding her treatment of private body consciousness, and how should she adjust her methodology to study this variable correctly?

Case context: Dr. Ramirez is designing a factorial experiment to test how private body consciousness interacts with a new relaxation training program to reduce anxiety. In her research proposal, she states that she will randomly assign half of her participants to the 'high private body consciousness' condition and the other half to the 'low private body consciousness' condition before administering the relaxation training.

Question: Based on your understanding of participant variables, what is the fundamental methodological flaw in Dr. Ramirez's research design regarding her treatment of private body consciousness, and how should she adjust her methodology to study this variable correctly?

Sample answer: The fundamental flaw in the design is that Dr. Ramirez is attempting to randomly assign participants to different levels of private body consciousness. Because private body consciousness is a pre-existing participant variable (a natural characteristic of the individual), it cannot be actively manipulated or assigned. To fix her methodology, she should use a measurement tool, such as a self-report questionnaire, to assess the participants' naturally occurring levels of private body consciousness, treating it as a non-manipulated independent variable alongside the relaxation training.

Key points:

  • Private body consciousness is a pre-existing participant variable.
  • Participant variables cannot be randomly assigned or actively manipulated.
  • The researcher must measure the variable using a tool like a self-report questionnaire.
  • It should be treated as a non-manipulated independent variable in the design.

Rubric: Full credit is given if the student identifies that private body consciousness cannot be randomly assigned and explains that it must be measured as a pre-existing characteristic.

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Updated 2026-05-27

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Research Methods in Psychology - 4th American Edition @ KPU

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