A Researcher Interested in the Effects of Strenuous Exercises on Reaction

question 153

Multiple Choice

A researcher interested in the effects of strenuous exercises on reaction time gives his experimental group the following instructions: "For the next half hour,you will be guided through a series of strenuous aerobic exercises.At the end of the exercise session,you'll complete a reaction-time test.If you're older,the reaction-time test may be a bit more challenging." He gives the control group the following instructions: "For the next half hour,you will be guided through a series of non-strenuous stretching exercises.At the end of the exercise session,you'll complete a reaction-time test." What's wrong with this study?

• A) There is no control group.
• B) Experimenter bias may have influenced the results.
• C) The study lacks a dependent variable.
• D) The placebo effect way have come into play.

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