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Smith, J. David – American Journal of Mental Deficiency, 1977
Sensitivity to logical contradiction, as manifested by surprise reaction to the Jastrow illusion, was investigated in 30 nonretarded children, 30 educable mentally retarded (EMR) children equated for chronological age, and 30 EMR children equated for mental age. (Author)
Descriptors: Cognitive Development, Elementary Secondary Education, Exceptional Child Research, Logical Thinking
Smith, Douglas C. – Applied Research in Mental Retardation, 1986
Interpersonal problem-solving skills of 17 mildly retarded students and two groups of nonretarded subjects (Ns=30) matched on mental age (MA) and chronological age were assessed using hypothetical problem solving situations. Results indicated similarities between mentally retarded subjects and MA matched controls in types and number of strategies…
Descriptors: Age Differences, Cognitive Development, Cognitive Processes, Elementary Secondary Education
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Abbeduto, Leonard; And Others – American Journal of Mental Retardation, 1989
The study examined whether the development of receptive language lags behind nonverbal cognitive development in school age persons with mental retardation. Results indicated that the relationship between receptive language and mental age varied across mental age levels, linguistic forms, and individuals at the same mental age for listeners with…
Descriptors: Cognitive Development, Developmental Stages, Elementary Secondary Education, Individual Differences