Which of the following threats to external validity happens when the subjects learn information based on the pretest?
A) reactive arrangements
B) multiple treatment interference
C) experimenter effects
D) pretest sensitization

Question

Quizplus · Accepted Answer

Pretest sensitization occurs when subjects are influenced by having taken a pretest, which may increase their awareness of the study and affect their behavior during subsequent tests or treatments. This can threaten the external validity of the study because it may not accurately reflect how people would behave in the real world.

Which of the Following Threats to External Validity Happens When