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Cohort Study is an observational study in which a group of individuals â a cohort â are followed over a period of time in order to determine either the incidence rate of certain diseases or the risk factors that lead to those diseases. These studies can be either prospective or retrospective.
SUMMARY OF CHAPTER 4. Correlational research represents a general approach to research that focuses on assessing the covariation among naturally occurring variables. The goal of correlational research is to identify predictive relationships by using correlations or more sophisticated statistical techniques. The results of correlational research also have implications for decision making, as reflected in the appropriate use of actuarial prediction.