Answer I believe is cognitive
Correlational research is most useful for
purposes of PREDICTION.
Correlational research is a type of research wherein the researcher uses two
factors or variables and checks the relationship of the two variables. In this
type of research in order to get good results, the researcher should set at
least 30 participants in order to increase the validity of result of the
research.
Answer: The impact of the Great Depression on the rich and poor
Explanation: A cohort is a group of individuals who experienced or share a common event in a specific time period. The cohort effect is used to describe various characteristics of an area of study such as the incidence of a characteristic over time among subjects who are defined by some shared life experience such as the Great Depression.
The Great Depression may have affected the poor and the rich differently but the events leading up to, during and the aftermath is an experience that was shared by both the rich and poor and this shared experience may influence the entire group's opinions and decisions for several years.