Susan is a participant in a research study. She has never participated in a study before, and she is excited and a little nervous, so she unintentionally behaves differently than she normally would. Susan's situation is an example of which threat to external validity?
A) The novelty effect
B) Fatigue
C) Practice
D) Multiple treatment interference

Question

Quizplus · Accepted Answer

The novelty effect occurs when participants' behavior is influenced by the novelty of the situation, leading them to behave differently than they normally would. This threat to external validity can occur when participants are new to a research study or when they encounter a new experimental manipulation. Susan's behavior in this scenario is an example of the novelty effect.

Susan Is a Participant in a Research Study