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Peer reviewedBoles, David B. – Child Development, 1980
Critically reviews literature relevant to the hypothesis that a major X-linked gene determines spatial ability in man. It is concluded that belief in the validity of the hypothesis is unfounded. (Author/SS)
Descriptors: Cognitive Ability, Genetics, Heredity, Nature Nurture Controversy
Peer reviewedSmalley, Susan L.; Asarnow, Robert F. – Journal of Autism and Developmental Disorders, 1990
The study compared 9 nonretarded autistic males and 25 of their first-degree relatives with 22 control relatives, to identify potential cognitive subclinical markers in autism and differences in emotion recognition and labeling. Subjects showed an atypical cognitive profile with above average visuospatial ability and difficulty in recognizing…
Descriptors: Adults, Autism, Cognitive Ability, Emotional Development
Peer reviewedCardon, Lon R.; And Others – Intelligence, 1992
A multivariate hierarchical model of specific cognitive abilities was fitted to data from 196 adopted and 213 nonadopted children from the Colorado Adoption Project and 120 of their siblings to assess genetic influence on specific mental abilities. Genetic effects occur in middle childhood that differentially influence mental ability scores.…
Descriptors: Adopted Children, Cognitive Ability, Elementary Education, Elementary School Students
