Pretest-posttest designs are quasi-experiments when they do not contain a ______.
A) confounding variable
B) dependent variable
C) randomly assigned control group
D) independent variable

Question

Quizplus · Accepted Answer

Quasi-experiments lack control over the assignment of participants to groups, so the absence of a randomly assigned control group is a characteristic of this type of design. Pretest-posttest designs include measurements taken before and after a treatment or intervention, so they do contain dependent variables and independent variables. Confounding variables can also be present in quasi-experiments, but their absence is not a defining characteristic of pretest-posttest designs.

Pretest-Posttest Designs Are Quasi-Experiments When They Do Not Contain a ______