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Flynn, James R.; Rossi-Case, Lilia – Intelligence, 2012
The literature on IQ gains in Latin America is sparse. We estimate gains on Raven's Progressive Matrices in the city of La Plata (Argentina) between 1964 and 1998. The gains are robust at the top of the curve as well as at the bottom. Therefore, they are contrary to the hypothesis that nutrition played a major role in recent Argentine IQ gains.…
Descriptors: Intelligence Quotient, Nutrition, Change, Test Norms
Flynn, James R. – Journal of Psychoeducational Assessment, 2010
Despite Kaufman, Raven's Progressive Matrices and the Wechsler subtest Similarities are tests whose gains call for special explanation. The spread of "scientific spectacles" is the key, but its explanatory potential has been exhausted. Three trends force us to look elsewhere: (a) gains on Wechsler subtests such as Picture Arrangement,…
Descriptors: Intelligence Tests, Change, Test Norms, Measures (Individuals)
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Flynn, James R. – Intelligence, 1993
Data of Skodak and Skeels (1949) are reinterpreted to suggest that at least one-third of the reported advantage of adopted children's intelligence quotients (IQ) over adoptive mothers is an artifact of the IQ test norms. The children's mean IQ could easily be higher than the estimated figures usually quoted. (SLD)
Descriptors: Adopted Children, Adoptive Parents, Comparative Analysis, Estimation (Mathematics)