Harley Was Participating in an Experiment in Which She Was

Multiple Choice

Harley was participating in an experiment in which she was given a pill that was supposed to cause her to get drowsy. Five minutes after taking the pill, Harley reported that she felt drowsy and wanted to lie down. The pill was actually made of sugar and had no ingredients to cause drowsiness. How do you explain Harley's drowsy feeling?

A) experimenter effect
B) placebo effect
C) subject bias
D) treatment effect