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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.
Sociologists may conduct crossâcultural research, or research designed to reveal variations across different groups of people. Most crossâcultural research involves survey, direct observation, and participant observation methods of research.