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The Flynn Effect in Sibships: Investigating the Role of Age Differences between Siblings
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Sundet, Jon Martin; Eriksen, Willy; Borren, Ingrid; Tambs, Kristian – Intelligence, 2010
The aim of the study was to investigate the relationship between the Flynn effect and the effects of age differences between siblings on the intelligence difference between them. In Norway, the secular trends in intelligence-test score means vary both in magnitude and direction. We identified three periods: one period where the mean intelligence…
Descriptors: Intelligence, Siblings, Intelligence Quotient, Birth Order
Structure of Intelligence in Intellectually Precocious Children and in Their Parents.
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Benbow, Camilla Persson; And Others – Intelligence, 1983
Students of high intellectual ability and their parents were tested on a battery of cognitive tests. Vernon's model of intelligence best fit results. A verbal-educational and a practical-spatial-mechanical factor explained most performance variance. Among children, age related to verbal but not spatial or mechanical abilities. (Author/RD)
Descriptors: Age Differences, Cognitive Ability, Cognitive Processes, Cognitive Tests
An Analysis of Short-Term Memory Differences between Retardates and Nonretardates.
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Cohen, Ronald L.; Nealson, Judi – Intelligence, 1979
Retarded subjects were compared with mental- and chronological-age matched controls on serial short-term memory (STM) tasks. Retarded subjects were inferior to the control groups on both primacy and recency items, under two recall conditions. These data are discussed in relation to possible mechanisms underlying IQ-related individual differences…
Descriptors: Age Differences, Cognitive Processes, Elementary Secondary Education, Individual Differences