In one study (Hedrick et al., 1993), researchers compared the number of motorcycle fatalities that occurred before helmets were mandatory, after helmets were mandatory, and after the helmet laws were repealed. This study used an ______ format with the interrupted time-series design.

Question

Quizplus · Accepted Answer

The study used an A-B-A design, where A represents the period before helmets were mandatory, B represents the period after helmets were mandatory, and A represents the period after the helmet laws were repealed.

In One Study (Hedrick Et Al