For a district-wide evaluation of bullying prevention programs at multiple levels, which analysis is most appropriate?

For a district-wide evaluation of bullying prevention programs at multiple levels, which analysis is most appropriate?

• A. Cross-sectional survey at a single time point
• B. Pretest-posttest analysis
• C. Repeated cross-sectional design each year
• D. Qualitative interviews with a sample of students

Answer: (B)

Measuring change over time to assess program impact. A pretest-posttest design lets you collect data before the bullying prevention program is implemented and again after it has been in place, across multiple levels (students, teachers, school climate). This setup shows whether the district-wide initiative is associated with changes in bullying incidents, bystander behavior, norms, or perceptions, providing a clear estimate of the program's effect. In contrast, a cross-sectional survey at a single time point can't show change or attribute it to the program. A repeated cross-sectional design tracks different samples each year and can reveal trends but doesn't tie those changes to a specific intervention in the same cohort. Qualitative interviews yield rich, contextual information but typically don't provide the broad, quantitative evidence needed to judge district-wide impact across multiple groups. The pretest-posttest approach offers the most direct assessment of change attributable to the program across levels.

Measuring change over time to assess program impact. A pretest-posttest design lets you collect data before the bullying prevention program is implemented and again after it has been in place, across multiple levels (students, teachers, school climate). This setup shows whether the district-wide initiative is associated with changes in bullying incidents, bystander behavior, norms, or perceptions, providing a clear estimate of the program's effect. In contrast, a cross-sectional survey at a single time point can't show change or attribute it to the program. A repeated cross-sectional design tracks different samples each year and can reveal trends but doesn't tie those changes to a specific intervention in the same cohort. Qualitative interviews yield rich, contextual information but typically don't provide the broad, quantitative evidence needed to judge district-wide impact across multiple groups. The pretest-posttest approach offers the most direct assessment of change attributable to the program across levels.