Longitudinal study?

A longitudinal study is a type of research design that involves collecting data from the same group of participants over an extended period of time. This allows researchers to track changes and developments in the participants' behavior, attitudes, or other variables of interest over time. Longitudinal studies are often used to examine the effects of certain interventions or treatments, to study the development of individuals over time, or to investigate the long-term effects of certain factors on health or well-being.