Brent studied a group of 100 athletes from fifth to twelfth grade, each year assessing the same features of physical and cognitive development. what type of study did brent conduct

Brent conducted a longitudinal study

A longitudinal study is a type of an observational research technique that involves repeated collection of data or observation of same variables for the same subjects or features over short or long periods of time. Longitudinal research projects can be conducted over years or even generations and it allow researchers to study and compare changes over time.