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Zajonc, R. B.; And Others – American Sociological Review, 1991
Responds to "Birth Order and Intelligence: Further Tests of the Confluence Model" by Robert D. Retherford and William H. Sewell. Reviews their arguments and suggests that their analyses of the Wisconsin Longitudinal Study data support rather than contradict the model. (CJS)
Descriptors: Birth Order, Intelligence Differences, Longitudinal Studies, Mathematical Models
Peer reviewed Peer reviewed
Pfouts, Jane H. – Journal of Marriage and the Family, 1980
Very close age spacing was an obstacle to high academic performance for later borns. In family relations and self-esteem, first borns scored better and performed in school as well as their potentially much more able younger siblings, regardless of age spacing. (Author)
Descriptors: Academic Achievement, Age Differences, Birth Order, Family Influence
Peer reviewed Peer reviewed
Retherford, Robert D.; Sewell, William H. – American Sociological Review, 1991
Confluence theory was developed to explain the negative effects of birth order on intelligence. Using aggregate, between-family, within-family, and paired-sibling data from the Wisconsin Longitudinal Study, tests the mathematical form of confluence theory and finds no support for it. Suggests that statistical methods used to fit the model to the…
Descriptors: Birth Order, Goodness of Fit, Intelligence Differences, Intelligence Quotient