An experimenter studies the relationship between caffeine and reaction time.She designs her experiment with four groups.Group 1 receives 100 mg of caffeine each in their cups of coffee,group 2 receives 200 mg of caffeine each in their cups of coffee,group 3 receives 300 mg of caffeine each in their cups of coffee,and group 4 receives no coffee.Twenty minutes later,participants from all the groups are given a reaction-time test. In this experiment,which group is the control group?

Question

Quizplus · Accepted Answer

The control group is the group that does not receive the treatment being tested. In this experiment, the treatment being tested is the varying doses of caffeine. Therefore, the group that receives no coffee (group 4) is the control group.

An Experimenter Studies the Relationship Between Caffeine and Reaction Time