A researcher records the number of motorcycle fatalities before and after the implementation of a mandatory helmet law.During the same period,she compares this number to the number of motorcycle fatalities of three states that do not have a mandatory helmet law.This research design would be an example of a(n)_____ design.

Question

Quizplus · Accepted Answer

The research design is a control series because it involves comparing the effects of an intervention (mandatory helmet law) in one group (state with the law) to a control group (states without the law).

A Researcher Records the Number of Motorcycle Fatalities Before and After