A distinguishing characteristic of the nonequivalent control-group design is that the
A) control group does not receive a pretest
B) researcher has control over confounding variables
C) experimental and control treatments are randomly assigned to the groups
D) subjects are not randomly assigned to the experimental and control groups

Question

Quizplus · Accepted Answer

The nonequivalent control-group design does not randomly assign subjects to the experimental and control groups, which may lead to selection bias and confounding variables. Therefore, it is important to carefully match the groups based on relevant characteristics before the study begins to minimize the effect of extraneous variables.

A Distinguishing Characteristic of the Nonequivalent Control-Group Design Is That