Abstract
Thirty-three children identified at birth as having aneuploidy of sex chromosomes were assessed with one to four annual examinations between four and eight years of age for general intelligence, verbal skills, perceptual functioning, motor ability, and educational attainment. Interviews, rating scales and symptomatic check lists provided information on temperamental characteristics of the children and also of parental attitudes. The psychological assessments were done “blind” and in the case of the rated variables, the use of two judges provided a basis for determining reliability of the raters. Findings follow in this table (all units are standard scores):
Inter-test variabilities are high implying that a single estimate of “general intelligence” is misloading. Perceptual skills generally fall within average limits while verbal ability is low. Deficits are most pronounced in 47 XXX children. Temperamental difficulties or overt behaviour problems have been encountered in all groups, The groups, thus far, do not differ in the incidence of behaviour problems nor do particular constellations of behavioural traits characterize any karyotype.
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Stewart, D., Bailey, J. & Hetlov, C. PSYCHOLOGICAI DEVELOPMENT OF CHILDREN WITH X AND Y CHROMOSOME ANEUFLOTDY. Pediatr Res 11, 412 (1977). https://doi.org/10.1203/00006450-197704000-00258
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DOI: https://doi.org/10.1203/00006450-197704000-00258