Phil Is a Participant in a Study Designed to Examine

question 56

Multiple Choice

Phil is a participant in a study designed to examine the effects of taking a dietary supplement on muscle tissue development.Phil suspects he is in the experimental group,because he is certain his muscles are bigger and stronger as a result of taking the product supplied by the researchers.When the study is completed,Phil learns that he did not receive the dietary supplement.Phil thinks the researchers made a mistake-he is certain his muscle mass increased while he took the supplement.According to this information,Phil's belief that his physical condition improved while he participated in the study is an example of ______.

• A)an anecdotal report
• B)human subject bias
• C)participant fatigue
• D)the placebo effect

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Definitions:

Simple Main Effect

In a factorial design, the effect of one independent variable at a particular level of another independent variable.

Factorial Design

A research design that involves investigating the effects of multiple variables at the same time to determine their individual and combined effects on the outcome.

Independent Groups Design

A study setup where separate groups are tested under each condition or treatment, ensuring no participant experiences more than one condition.

Participants

Individuals who take part in a research study or experiment.