A researcher introduces a new exercise program in the psychiatric ward of one hospital and uses the psychiatric ward at another hospital as a no-treatment control group. Before the program begins, the depressed patients in both hospitals are evaluated for their level of depression. After the program is in place for six months, the patients are evaluated again and the researcher compares the before and after scores for the two groups. This research study is classified as ____.
A) correlational
B) experimental
C) quasi-experimental
D) nonexperimental

Question

Quizplus · Accepted Answer

This study is classified as quasi-experimental because it involves an intervention (the new exercise program) but lacks random assignment of participants to the treatment and control groups, which is a key feature of true experimental designs.

A Researcher Introduces a New Exercise Program in the Psychiatric