Genetically informed, multilevel analysis of the Flynn Effect across four decades and three WISC versions

• Published in: Child development Vol. 93; no. 1; pp. e47 - e58
• Main Authors: Giangrande, Evan J., Beam, Christopher R., Finkel, Deborah, Davis, Deborah W., Turkheimer, Eric
• Format: Journal Article
• Language: English
• Published: United States Wiley 01.01.2022; Blackwell Publishing Ltd
• Subjects: Adolescent; Age Differences; Between-subjects design; Child; Childhood; Children; Cognitive Ability; Early Adolescents; Environmental aspects; Environmental factors; Environmental Influences; Genetics; Humans; Intelligence; Intelligence - genetics; Intelligence Quotient; Intelligence Tests; Monozygotic; Multilevel Analysis; Scores; Standardization; Twin studies; Twin Studies as Topic; Wechsler Scales

This study investigated the systematic rise in cognitive ability scores over generations, known as the Flynn Effect, across middle childhood and early adolescence (7–15 years; 291 monozygotic pairs, 298 dizygotic pairs; 89% White). Leveraging the unique structure of the Louisville Twin Study (longit...