Among a group of men who were tracked for ten years,those who had scored over 130 on intelligence tests were more likely to suffer severe depression than those who had scored below 130 on intelligence tests.
A)Prospective observational study
B)Retrospective observational study
C)Experiment

Question

Quizplus · Accepted Answer

This is a prospective observational study as the group of men were tracked for ten years to observe the relationship between high intelligence scores and severe depression.

Among a Group of Men Who Were Tracked for Ten