A longitudinal study is research that
A) tests different age groups at the same point in time.
B) assesses different characteristics of a specific individual on a single test.
C) assesses different characteristics of a specific individual on multiple tests.
D) follows and retests the same group of people over time.

Question

Quizplus · Accepted Answer

A longitudinal study follows and retests the same group of people over time. Choices A and B refer to cross-sectional studies, which do not involve following the same individuals over time. Choice C may involve multiple tests, but it does not necessarily involve following the same individuals over time.

A Longitudinal Study Is Research That