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.

Question

Quizplus · Accepted Answer

The instructions given to the experimental group suggest that older participants may find the reaction-time test more challenging, which could introduce experimenter bias by influencing participants' expectations and performance.

A Researcher Interested in the Effects of Strenuous Exercises on Reaction