A researcher would like to compare the effectiveness of two drugs to treat anxiety. He gives Drug A to a participant and then gives Drug B to that same participant 12 hours later. Unfortunately, Drug A is not fully out of the participant's system yet, so the study is contaminated by
A) response bias.
B) a carryover effect.
C) demand characteristics.
D) experimenter bias.

Question

Quizplus · Accepted Answer

The carryover effect occurs when the effects of a previous treatment (Drug A) are still present and influence the response to a subsequent treatment (Drug B).

A Researcher Would Like to Compare the Effectiveness of Two