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Direct linkHaworth, Claire M. A.; Kovas, Yulia; Dale, Philip S.; Plomin, Robert – Intelligence, 2008
Using a genetically sensitive design, we investigated the etiology of academic performance in Science in elementary school, and its etiological links with other academic abilities and general cognitive ability ("g"). The sample consisted of over 2000 pairs of twins at 10 years of age from the Twins Early Development Study. Science performance, as…
Descriptors: Twins, Genetics, Etiology, Environmental Influences
Peer reviewedSaudino, Kimberly J.; And Others – Intelligence, 1994
Etiology of high and low cognitive ability in adulthood was explored through multiple regression analysis of data from 302 pairs of Swedish twins (median age=65.6 years). Both high and low cognitive ability groups demonstrate significant group heritability, with shared rearing environment of relatively low importance. (SLD)
Descriptors: Adults, Age Differences, Aging (Individuals), Cognitive Ability
