In the Philadelphia birth cohort study, the researchers studied a cohort of males born in 1945 in Philadelphia for approximately eight years (from age 10 to 18 years) to examine causes of delinquency. What is this study an example of?

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This study is an example of longitudinal research design because it followed a cohort of males over a period of approximately eight years to examine causes of delinquency.

In the Philadelphia Birth Cohort Study, the Researchers Studied a Cohort