Researcher George Vaillant combined samples from three studies: male Harvard graduates,boys from low-income urban families,and women with high IQs.Each of the studies began in the early decades of the 20th century and followed their samples with assessments every year or two from childhood or emerging adulthood into late adulthood.Vaillant conducted which of the following research designs?

Question

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George Vaillant conducted a longitudinal study, which involves following a group of individuals over a period of time and assessing them at various points during that time. This is indicated by the fact that he followed the samples from childhood or emerging adulthood into late adulthood with regular assessments every year or two.

Researcher George Vaillant Combined Samples from Three Studies: Male Harvard