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Peer reviewedSvanum, 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
Peer reviewedGuidubaldi, John; And Others – School Psychology Review, 1983
A wide array of data was gathered in a nationwide study, including parent and child interviews, intelligence test and achievement test scores, and teacher ratings of children's classroom performance. Results indicated extensive differences favoring intact family children, which persisted when IQ and socioeconomic status measures were controlled.…
Descriptors: Academic Achievement, Age Differences, Divorce, Elementary Education
