Respuesta :
The appropriate response is the longitudinal approach. A longitudinal report is an observational research technique in which information is accumulated for similar subjects more than once over some stretch of time. Longitudinal research tasks can stretch out finished years or even decades. In a longitudinal partner think about, similar people are seen over the investigation time frame.
The research study that Dr. Martin used is the longitudinal approach, it is a form of research method where the study that is being conducted uses the same subjects over the period of time in which Dr. Martin used to his research.