A researcher compares preexisting groups of individuals in which type of study?
A)between-subjects experiment
B)within-subjects experiment
C)nonequivalent group design
D)pre-post design

Question

A researcher compares preexisting groups of individuals in which type of study?
A)​between-subjects experiment
B)​within-subjects experiment
C)nonequivalent group design
D)​pre-post design

Quizplus · Accepted Answer

The nonequivalent group design compares preexisting groups of individuals; however, it cannot establish causality. The between-subjects experiment randomly assigns participants to groups, which allows for causal inferences to be made, but preexisting groups are not compared. The within-subjects experiment compares the same participants in different conditions, but does not involve preexisting groups. The pre-post design measures the same group of individuals before and after an intervention, but does not involve comparing preexisting groups.

A Researcher Compares Preexisting Groups of Individuals in Which Type