A researcher is interested in the effectiveness of an alcohol rehabilitation program on college students. The researcher could measure the attitudes of students at a particular college during one week, implement the alcohol rehabilitation program during the next week, and finally measure their attitudes again the following week. This is an example of _____. Select the best answer.

Block randomization design

No-treatment control condition design

Placebo control condition design

Pretest-posttest design

Nonequivalent groups design