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Longitudinal Study

Written by the Fiveable Content Team โ€ข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated September 2025

Definition

A longitudinal study is a research method in which data is collected from the same group of participants over an extended period of time to examine changes or developments that occur over time.

Longitudinal Study Definition - AP Psychology Key Term | Fiveable