PJ Conducts an Experimental Study on the Effects of Soft

Multiple Choice

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