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Tillmann, J.; Ashwood, K.; Absoud, M.; Bölte, S.; Bonnet-Brilhault, F.; Buitelaar, J. K.; Calderoni, S.; Calvo, R.; Canal-Bedia, R.; Canitano, R.; De Bildt, A.; Gomot, M.; Hoekstra, P. J.; Kaale, A.; McConachie, H.; Murphy, D. G.; Narzisi, A.; Oosterling, I.; Pejovic-Milovancevic, M.; Persico, A. M.; Puig, O.; Roeyers, H.; Rommelse, N.; Sacco, R.; Scandurra, V.; Stanfield, A. C.; Zander, E.; Charman, T. – Journal of Autism and Developmental Disorders, 2018
Research on sex-related differences in Autism Spectrum Disorder (ASD) has been impeded by small samples. We pooled 28 datasets from 18 sites across nine European countries to examine sex differences in the ASD phenotype on the ADI-R (376 females, 1763 males) and ADOS (233 females, 1187 males). On the ADI-R, early childhood restricted and…
Descriptors: Gender Differences, Age Differences, Diagnostic Tests, Observation
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Kuschner, Emily S.; Bennetto, Loisa; Yost, Kelley – Journal of Autism and Developmental Disorders, 2007
Previous research demonstrates an uneven pattern of cognitive abilities in children with autism spectrum disorders (ASDs). This study examined whether this uneven pattern exists within the nonverbal domain in young children. We hypothesized relative strengths in perceptual abilities and weaknesses in nonverbal conceptual abilities in preschoolers…
Descriptors: Concept Formation, Cognitive Ability, Young Children, Developmental Delays
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Tsatsanis, Katherine D.; Dartnall, Nancy; Cicchetti, Domenic; Sparrow, Sara S.; Klin, Ami; Volkmar, Fred R. – Journal of Autism and Developmental Disorders, 2003
The concurrent validity of the original and revised versions of the Leiter International Performance Scale was examined with 26 children (ages 4-16) with autism. Although the correlation between the two tests was high (.87), there were significant intra-individual discrepancies present in 10 cases, two of which were both large and clinically…
Descriptors: Adolescents, Autism, Children, Clinical Diagnosis
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Shah, Amitta; Holmes, Nan – Journal of Autism and Developmental Disorders, 1985
Paper discusses advantages and disadvantages of using the Leiter International Performance Scale with autistic children and presents the results of a study comparing the performance of 18 autistic children on the Wechsler Intelligence Scale for Children-Revised and the Leiter. Results showed a high positive correlation between the WISC-R…
Descriptors: Autism, Intelligence Quotient, Intelligence Tests, Test Use
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Maltz, Andrew – Journal of Autism and Developmental Disorders, 1981
The results showed that the performance of the autistic children was better than the other two groups on concrete discrimination tasks, was poorer than the other two groups on formal discrimination tasks, and the quality of the autistic children's performance decreased as task requirements for formal discrimination increased. (Author/SB)
Descriptors: Adolescents, Autism, Cognitive Development, Discrimination Learning