People are difficult to study because they often behave differently when they know that they are being observed,a phenomenon known as:
A)unpredictability.
B)variability.
C)complexity.
D)reactivity.

Question

Quizplus · Accepted Answer

Reactivity is the phenomenon where individuals modify their behavior in response to the fact that they are being observed or studied. This can make it difficult for researchers to accurately study and understand human behavior. Choices A, B, and C do not accurately describe this phenomenon.

People Are Difficult to Study Because They Often Behave Differently