What differentiates quasi-experimental designs from true experimental designs?
A)smaller samples
B)lack of random assignment of subjects to an experimental and a control group
C)shorter time periods
D)more rigorous definitions of the intervention
E)having a control group

Question

Quizplus · Accepted Answer

The lack of random assignment of subjects to an experimental and a control group is the main difference between quasi-experimental designs and true experimental designs. Quasi-experimental designs often use pre-existing groups or assign participants based on other factors rather than randomly. Other factors such as smaller samples, shorter time periods, or more rigorous definitions of the intervention can also be present in both types of designs. However, having a control group is a common feature of both true and quasi-experimental designs.

What Differentiates Quasi-Experimental Designs from True Experimental Designs