A researcher measures the dependent variable in an interventional group of subjects both before and after an intervention. The researcher also measures the same dependent variable in a non-interventional group, at the same two points in time. The groups are not randomly assigned. What kind of design is this?

Question

Quizplus · Accepted Answer

This is a pretest-posttest design with a comparison group because it involves measuring the dependent variable in both the interventional and non-interventional groups before and after the intervention, but without random assignment of participants to groups.

A Researcher Measures the Dependent Variable in an Interventional Group