Question

______ involves following a group of research participants for an extended period of time.

○ naturalistic observation

○ cross - sectional research

○ archival research

○ longitudinal research

Explanation:

Naturalistic observation involves observing subjects in their natural environment without intervention. Cross-sectional research collects data from a group at a single point in time. Archival research uses existing records or data. Longitudinal research is defined as studying the same group of participants over an extended period to track changes or trends.

Answer:

Longitudinal research