Which of the following is an example of a longitudinal study of drug use?
A) Surveying high-school seniors every year.
B) Following each individual throughout the entire day.
C) Sampling drug use from different parts of the country.
D) Following the same group of people at intervals over several months or years.

Question

Quizplus · Accepted Answer

Longitudinal studies involve observing or studying the same subjects over a period of time, making choice D the correct answer as it describes following the same group of people at intervals over several months or years to observe changes or developments in their behavior or characteristics, such as drug use.

Which of the Following Is an Example of a Longitudinal