The results of a quasi experimental design involving non-equivalent control groups with pretests and posttests
A) Cannot be believed because of confounding
B) Cannot always be interpreted
C) Lack power
D) Lack external validity

Question

Quizplus · Accepted Answer

Quasi experimental designs involving non-equivalent control groups with pretests and posttests are susceptible to threats to internal validity such as history, maturation, and regression to the mean. Hence, the results cannot always be interpreted with confidence.

The Results of a Quasi Experimental Design Involving Non-Equivalent Control