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Peer reviewedMolfese, Victoria J.; And Others – Merrill-Palmer Quarterly, 1997
Examined 128 children for contributions of biomedical risk conditions, SES, and HOME scores to prediction of intelligence, and association of extreme scores on HOME and SES to intelligence-test performance. Found home environment was the most important predictor of intelligence at all ages, with SES showing a smaller effect beginning at age 5.…
Descriptors: At Risk Persons, Biomedicine, Children, Family Environment
Peer reviewedPiven, Joseph; And Others – Journal of Autism and Developmental Disorders, 1991
Platelet serotonin (5HT) levels of 5 autistic subjects (ages 16-37) who had siblings with either autism or pervasive developmental disorder were significantly higher than levels of 23 autistic subjects without affected siblings. Autistic subjects without affected siblings had 5HT levels significantly higher than 10 normal controls. Sex, age, and…
Descriptors: Adults, Age Differences, Autism, Biochemistry
Peer reviewedLiss, Miriam; Harel, Brian; Fein, Deborah; Allen, Doris; Dunn, Michelle; Feinstein, Carl; Morris, Robin; Waterhouse, Lynn; Rapin, Isabel – Journal of Autism and Developmental Disorders, 2001
A study involving 35 children (age 9) with high-functioning autism, 31 children with developmental language disorder, 40 children with low-functioning autism, and 17 children with low IQ, found IQ was predictive of adaptive behavior in both low-functioning groups, but language and verbal memory predicted adaptive behavior in higher functioning…
Descriptors: Adaptive Behavior (of Disabled), Autism, Children, Cognitive Ability
Peer reviewedRushton, J. Philippe – Intelligence, 1989
Genetic influence was estimated on Wechsler Intelligence Scale for Children subtests from inbreeding depression scores calculated on cousin marriages in Japan (n=1,854 children) and correlated with American Black-White racial differences. The genetic contribution of racial differences in cognitive performance may be more robust than was previously…
Descriptors: Black Students, Children, Cognitive Ability, Genetics
Direct linkDykens, Elisabeth M. – American Journal on Mental Retardation, 2004
Although maladaptive and compulsive behaviors are increasingly well-described in young persons with Prader-Willi syndrome, it is unclear how these problems manifest in older adults with this syndrome. In Part I, I compared maladaptive and compulsive behaviors in 45 older adults with Prader-Willi syndrome (ages 30 to 50 years) to 195 children,…
Descriptors: Age Differences, Symptoms (Individual Disorders), Predictor Variables, Comparative Analysis
Peer reviewedSternberg, Robert J.; Grigorenko, Elena L.; Bundy, Donald A. – Merrill-Palmer Quarterly, 2001
Reviews findings on the predictive validity of psychometric tests of intelligence. Concludes that conventional tests of intelligence can be useful but only if they are interpreted very carefully, taking into account the factors that can affect them, and in conjunction with other measures. (Author)
Descriptors: Aptitude Tests, Children, Cognitive Ability, Early Childhood Education
Peer reviewedWadsworth, Sally J.; Olson, Richard K.; Pennington, Bruce F.; DeFries, John C. – Journal of Learning Disabilities, 2000
Composite reading performance data from 223 pairs of identical twins and 169 same-gender fraternal twins in which at least one member was classified with reading disability were subjected to multiple regression analysis. Results indicated that the genetic etiology of reading disability differs as a linear function of IQ. (Contains extensive…
Descriptors: Biological Influences, Children, Disability Identification, Environmental Influences
