True or False: A researcher designs an intervention that aims to reduce alcohol use among high school students. The researcher provides the intervention to students in one 12th-grade classroom and compares their alcohol use to that of students in another 12th-grade classroom who do not receive the intervention. Alcohol use is measured with a questionnaire completed by all participating students before and after the intervention. Random assignment to conditions was not possible because the researcher could not assign students to different classrooms. This is an example of an experimental pretest-posttest control group design.