Martinez is interested in how thinking changes in adolescence and early adulthood. She identifies two hundred 18-year-olds and has them respond to a written set of questions. She then waits four years, contacts them all again, and has them respond to a similar set of questions. Finally, she waits another four years, contacts the people again (who are now 26 years old), and asks them one last time to respond to her questions. The study Dr. Martinez has conducted is best considered an example of:
A) a longitudinal study
B) a cross-sectional study
C) a sequential-cohort study
D) an age-cohort experiment

Question

Quizplus · Accepted Answer

A longitudinal study identifies a cohort of participants and studies them at various points in time to see how they change as they age. That is what Dr. Martinez's study does.

Martinez Is Interested in How Thinking Changes in Adolescence and Early