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Peer reviewedOlson, Richard; And Others – Journal of Learning Disabilities, 1989
Word recognition data from identical and fraternal twins and siblings (N=172) indicated that the phonological coding deficit of children with reading disabilities was highly heritable. Orthographic coding was not significantly heritable. Poor readers with low IQs were superior to similar reading but average IQ readers in phonological coding.…
Descriptors: Elementary Secondary Education, Genetics, Heredity, Intelligence Differences
Johnson, Kathryn Mary; And Others – 1984
Several common assumptions about human intelligence are challenged in this paper. The "bucket" theory of intelligence describes intelligence as a stable psychological characteristic which affects learning, and which, when accurately measured, predicts an individual's learning capacity. The authors reject the idea that people who have…
Descriptors: Academic Ability, Academic Achievement, Cognitive Ability, Educational History
Download full textWalthall, Joe; Smith, Terry – 1990
This study investigated the relationship between measured intelligence and discrepancies existing between actual achievement levels and projected achievement levels in mildly handicapped resource room students in Arkansas. Twenty-seven students had been identified as learning disabled and 19 as mildly mentally retarded. Subjects each received…
Descriptors: Academic Achievement, Achievement Tests, Elementary Secondary Education, Handicap Identification
Peer reviewedVogel, Susan A.; Walsh, Patricia C. – Annals of Dyslexia, 1987
Gender differences in level and pattern of cognitive abilities were examined in 49 learning-disabled college students. Females were stronger in visual-motor abilities and verbal conceptualization, whereas the males' highest abilities were nonverbal visual-spatial. Both groups showed weaknesses in memory for digits and factual knowledge and in…
Descriptors: Arithmetic, Cognitive Ability, Cognitive Measurement, Cognitive Tests
