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

Quizplus · Accepted Answer

Vaillant conducted a longitudinal study, as he followed the same samples over time and assessed them at multiple points throughout their lives. The other choices are not applicable - a cross-sectional study would involve assessing different groups at the same point in time, a quasi-experiment involves manipulating a variable in some groups but not others, and a case study focuses on a single individual or small group.

Researcher George Vaillant Combined Samples from Three Studies: Male Harvard