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Childhood changes in speed of information processing and mental age: A brief report
Author(s) -
Nettelbeck T.,
Wilson C.
Publication year - 1994
Publication title -
british journal of developmental psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.062
H-Index - 75
eISSN - 2044-835X
pISSN - 0261-510X
DOI - 10.1111/j.2044-835x.1994.tb00634.x
Subject(s) - psychology , peabody picture vocabulary test , correlation , developmental psychology , information processing , mental age , test (biology) , intelligence quotient , cognition , cognitive psychology , neuroscience , mathematics , paleontology , geometry , biology
Measures of inspection time (IT) and raw Peabody (PPVT) scores obtained by Nettelbeck & Wilson (1985) from 70 children aged from 6 to 13 years were used to test predictions that, if mental age (MA) growth is mediated by speed of information processing, then controlling for IT (speed index) would reduce correlation between chronological age (CA) and PPVT (MA index) to zero; but the correlation between IT and PPVT would be unaffected by controlling for CA effects. The opposite outcome was found, suggesting that increasing CA mediates both MA growth and improvement in processing speed. Implications for theories about the nature of intelligence are discussed.