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Elkind, David – Harvard Educ Rev, 1969
Descriptors: Child Development, Cognitive Development, Environmental Influences, Genetics

Svanum, Soren; Bringle, Robert G. – Journal of Educational Psychology, 1980
The confluence model of cognitive development was tested on 7,060 children. Family size, sibling order within family sizes, and hypothesized age-dependent effects were tested. Findings indicated an inverse relationship between family size and the cognitive measures; age-dependent effects and other confluence variables were found to be…
Descriptors: Academic Achievement, Age Differences, Birth Order, Cognitive Development