To Determine Whether a New Anti-Drug Campaign Has Had an Impact

Multiple Choice

To determine whether a new anti-drug campaign has had an impact on students' usage of drugs, an educator compares students' drug usage during the five weeks before and the five weeks after the anti-drug campaign. Which quasi-experimental design characterizes the educator's investigation?

A) single-case experimental design
B) cross-lagged panel design
C) time-series design
D) nonequivalent-groups design