Preschool IQs after twenty-five years

"Of the 212 preschool children living in the San Francisco Bay Area who composed part of the standardization group of the 1937 Revision of the Stanford-Binet, 111 were retested as adults 25 years later. The sample was somewhat biased . . . . The Pearsonian r between adult and preschool Stanford...

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Bibliographic Details
Published in:Journal of educational psychology 1958-10, Vol.49 (5), p.278-281
Main Authors: Bradway, Katherine P, Thompson, Clare W, Cravens, Richard B
Format: Article
Language:English
Subjects:
Human
Intelligence Quotient
Preschool Students
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Summary:"Of the 212 preschool children living in the San Francisco Bay Area who composed part of the standardization group of the 1937 Revision of the Stanford-Binet, 111 were retested as adults 25 years later. The sample was somewhat biased . . . . The Pearsonian r between adult and preschool Stanford-Binet IQs over the 25-year period is .59. The mean IQ showed a rise of 10.8 points in 25 years. This rise occurred in the years after early adolescence, there being no increase in mean IQ between preschool and adolescent testings. This is interpreted as invalidating the assumption that intelligence stops increasing at 16 years." From Psyc Abstracts 36:02:2HD78B.
ISSN:0022-0663
1939-2176
DOI:10.1037/h0044412