A researcher does a study where he examines the effects of a new reading program for teaching reading comprehension. He randomly assigns 30 students to an experimental group and 30 students to a control group. He then posttests the students after the program to see whether they are different in reading performance. The design used by the researcher is the:
A) Pretest-posttest control-group design
B) Posttest-only design with nonequivalent groups
C) One-group posttest-only design
D) Posttest-only control-group design

Question

Quizplus · Accepted Answer

The researcher uses a posttest-only control-group design because there is random assignment to experimental and control groups, and the measurement of reading performance occurs only after the intervention.

A Researcher Does a Study Where He Examines the Effects