In some studies, the experimenter does not know whether any particular participant is in the experimental or control condition. This procedure is used to reduce
A) selection bias.
B) the number of "good" participants.
C) experimenter expectancy effects.
D) demand characteristics.

Question

Quizplus · Accepted Answer

This procedure is known as a double-blind study and is used to reduce experimenter expectancy effects. By not knowing which participants are in the experimental or control condition, the experimenter's expectations or biases are less likely to influence the results.

In Some Studies, the Experimenter Does Not Know Whether Any