UGC NET Questions (Paper – 1)

A control group provides a baseline against which the effects of the experimental treatment can be compared. By keeping conditions for this group similar to those of the experimental group except for the treatment, researchers can attribute observed differences in outcomes more confidently to the intervention itself. Control groups are central to establishing internal validity in experimental designs. Thus, the group described in the stem is correctly called a control group.

Option A:
Control groups may receive no treatment, standard treatment or a placebo, depending on the study, but their key role is to mirror the experimental conditions minus the active ingredient being tested. This comparative function aligns exactly with the stem, making this option correct.

Option B:
A placebo group receives an inert or sham treatment and is one specific type of control group, particularly in clinical trials, but the more general term used in basic experimental design is control.

Option C:
Random describes a procedure for assignment or selection, not a type of group, so it does not fit the blank, which asks about the role of a group.

Option D:
Matched groups are formed by pairing participants on key variables before assigning them to conditions, which is a method of forming comparable groups but not the standard name of the comparison group itself.