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Shared and Unique Genetic and Environmental Influences on Aging-Related Changes in Multiple Cognitive Abilities
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Tucker-Drob, Elliot M.; Reynolds, Chandra A.; Finkel, Deborah; Pedersen, Nancy L. – Developmental Psychology, 2014
Aging-related declines occur in many different domains of cognitive function during middle and late adulthood. However, whether a global dimension underlies individual differences in changes in different domains of cognition and whether global genetic influences on cognitive changes exist is less clear. We addressed these issues by applying…
Descriptors: Genetics, Environmental Influences, Aging (Individuals), Cognitive Ability
Changing Differences in Intelligence? Comparisons between Groups of 13-Year-Olds Tested from 1960-1990.
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Emanuelsson, Ingemar; And Others – Scandinavian Journal of Educational Research, 1993
Changes in verbal, spatial, and reasoning intelligence among Swedish 13-year olds were studied from 1960 to 1990. Rising verbal scores until 1980 have been followed by a decline to essentially the 1960 level. Spatial and reasoning results have risen continuously. Gender and social class differences are discussed. (SLD)
Descriptors: Adolescents, Change, Comparative Analysis, Educational Trends
Changes in Intelligence from 1960 to 1995 in Relation to Cohort, Gender, and Socioeconomic Background.
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Svensson, Allan; And Others – 1997
As part of a continuing evaluation of the Swedish school system, changes in intelligence test scores from 1960 to 1995 were studied in relation to cohort, gender, and socioeconomic background. Changes in verbal, spatial, and reasoning ability were studied by comparing results on identical tests given to representative samples of Swedish…
Descriptors: Change, Cohort Analysis, Educational History, Elementary Education