Thirty-six retarded and 36 nonretarded children and adolescents, individually matched for mental age, were given discrimination problems at two levels of stimulus complexity to test the hypothesis that retarded persons require more trials to reach criterion on the more complex problems. (Author)

Minutiae, ends and junctions of finger tip or palm lines, were analyzed in a sample of 115 normal adult individuals, 40 cases of Down's syndrome, and 130 normal children (aged 6 to 14 years). (DB)

The relationship between training history and the distinctiveness of stimulus cues in original learning and in transfer on the learning of intradimensional and extradimensional shifts by 96 adult institutionalized, retarded Ss was investigated. (Author)

The heart rate component of the orienting reflex to novel and signal stimuli was compared in 32 nonretarded and 32 retarded subjects matched on chronological age (mean age 10 years). (Author)

Reviewed were clinical and genetic features of 27 cases of the Noonan Syndrome, a condition with characteristics such as webbing of the neck, short stature, frequent congential heart lesions, and chromosomal irregularities. (DB)

Analyzed were the performance and personality of 20 interpreters for the deaf who completed a battery of psychological tests and interpreted two tape recorded selections (one judged easy and the other judged difficult). (DB)

It was the major intent of the present study to investigate personality trait differences among adolescents judged to be differentially gifted. (Author)