Experimenter expectancies can be reduced by using
A) trained experimenters instead of machines
B) a placebo control group
C) a double-blind procedure
D) a between-subjects rather than a within-subjects design

Question

Quizplus · Accepted Answer

A double-blind procedure involves neither the participant nor the experimenter knowing the treatment condition of the participant. This helps to reduce experimenter expectancies as the experimenter does not know which participants are receiving the actual treatment and which ones are receiving a placebo or a different treatment. Trained experimenters instead of machines (A) and between-subjects rather than within-subjects design (D) are not related to reducing experimenter expectancies. Placebo control groups (B) can help control for placebo effects in participants, but they do not necessarily reduce experimenter expectancies.

Experimenter Expectancies Can Be Reduced by Using