A researcher conducts a study on the effectiveness of a new prisoner rehabilitation program. All of the elements of an experiment are present except that the groups were not randomly assigned. This study is an example of a(n) ______.
A) nonequivalent control group design
B) before-and-after design
C) ex post facto control group design
D) regression-discontinuity design

Question

Quizplus · Accepted Answer

The absence of random assignment in a study that otherwise has all the elements of an experiment, including a control group, makes it a nonequivalent control group design. This design involves comparing groups that are not created through random assignment, which can introduce selection bias but is often used in situations where random assignment is not feasible.

A Researcher Conducts a Study on the Effectiveness of a New