A researcher collects data on 50-year-olds and follows them for 20 years to see if they responded the same or differently when they were 50, 60, and 70 years old. This researcher is employing a ________ experimental design.
A) cross-sectional
B) longitudinal
C) sequential
D) gradual

Question

Quizplus · Accepted Answer

The researcher is using a longitudinal experimental design, which involves studying the same group of individuals over an extended period to observe changes or differences as they age.

A Researcher Collects Data on 50-Year-Olds and Follows Them for 20