PJ conducts an experimental study on the effects of soft music during high stakes science testing. He randomly assigns students at the school. In one condition he does not provide music for testing while in the other group he does provide the music. He administers a pretest at the beginning of the year and a posttest at the end of the year. PJ's design is best represented by which of the following?
A) Static-group comparison
B) Pretest-posttest control group design
C) One-shot case study
D) One-group pretest-posttest design

Question

Quizplus · Accepted Answer

This study is best represented by the pretest-posttest control group design because the students are randomly assigned to either the group that receives music or the group that does not receive music. The pretest is administered before the intervention (providing music) and the posttest is administered after. The control group does not receive the intervention, and the design allows for comparison of the two groups to see if music has an effect on test scores.

PJ Conducts an Experimental Study on the Effects of Soft