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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?
Succession
The progressive, natural change in an ecosystem's species composition over time, leading to ecological stability.
Facilitation Model
A concept in ecology where some species make conditions more suitable for the establishment and growth of other species in a habitat.
Tolerance Model
is a theory in ecology that describes how the ability of a species to tolerate environmental stress affects its success and distribution.
Inhibition Model
A concept used in various scientific disciplines, often referring to a process where one factor or substance decreases the rate or extent of a particular reaction or activity.
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