In a study of the effects of a certain antipsychotic drug,the control group receives pill which does not actually contain the drug.This group has received a.

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The control group is receiving a pill which does not contain the actual drug, known as a placebo. A placebo is often used in studies to control for the placebo effect, which occurs when a patient's belief in a treatment's effectiveness causes them to experience an improvement in symptoms even if the treatment itself is not effective. The other options, such as dependent variable, double-blind, pretest, and pseudo-treatment, do not accurately describe the purpose or characteristics of the control group.

In a Study of the Effects of a Certain Antipsychotic