To Control for the Placebo Effect, an Experimenter Uses _____

Multiple Choice

To control for the placebo effect, an experimenter uses _____ in which the participants do not know if they are receiving a real drug or a placebo, although the experimenter giving them the pill does know which group received the real drug or the placebo.

A) a single-blind experiment
B) a double-blind experiment
C) random selection
D) random assignment