Sonny examines the number of traumatic head injuries that occurred in California monthly for five years before and after the passage of a law requiring the wearing of a helmet.Sonny's design would be classified as a(n)
A) non-equivalent control group pretest-posttest design.
B) program evaluation.
C) control series design.
D) interrupted time series design.

Question

Quizplus · Accepted Answer

The design described is an interrupted time series design, as it includes data from before and after the implementation of an intervention (the law requiring helmet wearing) and tracks the outcome of interest (traumatic head injuries) over time. This design allows for the assessment of whether the intervention had an effect and can help rule out alternative explanations for changes in the outcome over time.

Sonny Examines the Number of Traumatic Head Injuries That Occurred