An experiment includes a treatment condition,a no-treatment control,and a placebo control.Which two conditions should be compared to determine the size of the placebo effect?
A)placebo versus treatment
B)placebo versus no-treatment
C)treatment versus no-treatment
D)You only need to look at the scores in the placebo control condition.

Question

Quizplus · Accepted Answer

The size of the placebo effect can be determined by comparing the placebo control condition (where participants receive a placebo instead of the actual treatment) to either the treatment condition (where participants receive the actual treatment) or the no-treatment control condition (where participants receive no treatment or placebo). Therefore, the best choice is B (placebo versus no-treatment).

An Experiment Includes a Treatment Condition,a No-Treatment Control,and a Placebo