When using the nonequivalent comparison group design, you can increase internal validity by
A) allowing students to self select into groups
B) allowing parents to decide which group their children will be in
C) not allowing students to self select into groups
D) not pre-testing participants

Question

Quizplus · Accepted Answer

By not allowing students to self-select into groups, researchers can better control for selection biases, thereby increasing the internal validity of the study. Self-selection can introduce systematic differences between groups that are not due to the intervention being studied.

When Using the Nonequivalent Comparison Group Design, You Can Increase