A Researcher Collects Data on 50- and 60-Year-Olds and Follows

Multiple Choice

A researcher collects data on 50- and 60-year-olds and follows them for 10 years. This researcher then compares responses when the 50-year-olds were 50 years old, both groups when they were 60 years old, and the second set of participants when they were 70 years old. This researcher is employing a ________ experimental design.

A) cross-sectional
B) longitudinal
C) sequential
D) gradual