The problem of participant placebo effects and experimenter expectancy effects are both minimized by
A)operational definitions
B)random assignment
C)random sampling
D)the double-blind procedure

Question

Quizplus · Accepted Answer

The double-blind procedure minimizes both participant placebo effects and experimenter expectancy effects by ensuring that neither the participants nor the experimenters know who is receiving a particular treatment. This helps to prevent biases in the results.

The Problem of Participant Placebo Effects and Experimenter Expectancy Effects