When participants' behavior is affected by their expectations, _________ occurs.
A)a carryover effect
B)differential attrition
C)pretest sensitization
D)a placebo effect

Question

Quizplus · Accepted Answer

A placebo effect occurs when participants' behavior is affected by their expectations, often due to believing they are receiving a treatment that in fact has no therapeutic effect.

When Participants' Behavior Is Affected by Their Expectations, _________ Occurs