Question

You are interested in determining whether allowing prison inmates to have televisions in their cells will reduce violent behavior. you measure the rate of violence in the prison, install televisions in all cells, and then measure the rate of violence again one month later to see if there has been any change. what research design have you used?

Answer 1

I believe the answer is: A one-group pretest-posttest design
In A one-group pretest-posttest design, the measurements would be taken before and after the researches and the participants in the researches are not assigned randomly in order to see whether the treatment could affect the subjects.