A double-blind study:
A)necessarily has sufficient power to detect group differences.
B)usually lacks reliability.
C)minimizes expectancy effects.
D)cannot be used to determine cause and effect.

Question

Quizplus · Accepted Answer

A double-blind study minimizes expectancy effects by ensuring that neither the participant nor the researcher knows who is in the experimental or control group. It does not necessarily have sufficient power to detect group differences, lack reliability, or determine cause and effect.

A Double-Blind Study