In an experiment, the group of subjects to which the experimental group is compared is called the:

A) comparison group.
B) standard group.
C) confederate group.
D) control group.

Control Group

In experimental research, the group of participants that does not receive the experimental treatment or intervention, used as a baseline to compare the effects of the treatment.

Comparison Group

A group of subjects not exposed to the experimental treatment or intervention in a research study, used as a benchmark to assess the effect of such treatment.

Standard Group

A standard group, often comparable to a control group, refers to a group of subjects in an experimental setting who are exposed to the usual or benchmark conditions, enabling comparison to experimental outcomes.