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Saulnier, Celine A.; Klin, Ami – Journal of Autism and Developmental Disorders, 2007
Individuals with higher functioning autism (HFA) fail to translate their cognitive potential into real-life adaptation, and the severity of their symptoms is considerable despite their intellectual ability. This paper reports on a subsample from a larger study (A. Klin et al., in press) analyzed here by autism spectrum subtypes. It focuses on the…
Descriptors: Autism, Asperger Syndrome, Intelligence Quotient, Age
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Klin, Ami; Pauls, David; Schultz, Robert; Volkmar, Fred – Journal of Autism and Developmental Disorders, 2005
Objective: To examine the implications for research of the use of three alternative definitions for Asperger syndrome (AS). Differences across the three nosologic systems were examined in terms of diagnostic assignment, IQ profiles, comorbid symptoms, and familial aggregation of social and other psychiatric symptoms. Method: Standard data on…
Descriptors: Asperger Syndrome, Autism, Probability, Clinical Diagnosis
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Woodbury-Smith, Marc; Klin, Ami; Volkmar, Fred – Journal of Autism and Developmental Disorders, 2005
The diagnostic criteria for Asperger Syndrome (AS) according to ICD-10 and DSM-IV have been criticized as being too narrow in view of the rules of onset and precedence, whereby autism takes precedence over AS in a diagnostic hierarchy. In order to investigate this further, cases from the DSM-IV multicenter study who had been diagnosed clinically…
Descriptors: Asperger Syndrome, Clinical Diagnosis, Autism, Diagnostic Tests
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Paul, Rhea; Shriberg, Lawrence D.; McSweeny, Jane; Cicchetti, Domenic; Klin, Ami; Volkmar, Fred – Journal of Autism and Developmental Disorders, 2005
Shriberg "et al." [Shriberg, L. "et al." (2001). "Journal of Speech, Language and Hearing Research, 44," 1097-1115] described prosody-voice features of 30 high functioning speakers with autistic spectrum disorder (ASD) compared to age-matched control speakers. The present study reports additional information on the speakers with ASD, including…
Descriptors: Pervasive Developmental Disorders, Socialization, Suprasegmentals, Communication (Thought Transfer)
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Paul, Rhea; Augustyn, Amy; Klin, Ami; Volkmar, Fred R. – Journal of Autism and Developmental Disorders, 2005
Speakers with autism spectrum disorders (ASD) show difficulties in suprasegmental aspects of speech production, or "prosody," those aspects of speech that accompany words and sentences and create what is commonly called "tone of voice." However, little is known about the perception of prosody, or about the specific aspects of…
Descriptors: Suprasegmentals, Pervasive Developmental Disorders, Autism, Perception
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Ozonoff, Sally; Cook, Ian; Coon, Hilary; Dawson, Geraldine; Joseph, Robert M.; Klin, Ami; McMahon, William M.; Minshew, Nancy; Munson, Jeffrey A. – Journal of Autism and Developmental Disorders, 2004
Recent structural and functional imaging work, as well as neuropathology and neuropsychology studies, provide strong empirical support for the involvement of frontal cortex in autism. The Cambridge Neuropsychological Test Automated Battery (CANTAB) is a computer-administered set of neuropsychological tests developed to examine specific components…
Descriptors: Autism, Brain, Neuropsychology, Cognitive Tests
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Koenig, Kathleen; Klin, Ami; Schultz, Robert – Journal of Autism and Developmental Disorders, 2004
Prader-Willi syndrome (PWS), a genetic form of mental retardation, involves a myriad of physical and behavioral problems. Poor social adjustment has been reported, but the origin of this difficulty is unknown. The Social Attribution Task, a measure of one's ability to make appropriate social attributions from an ambiguous visual display [Klin…
Descriptors: Mental Retardation, Social Adjustment, Pervasive Developmental Disorders, Interpersonal Competence
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Paul, Rhea; Miles, Stephanie; Cicchetti, Domenic; Sparrow, Sara; Klin, Ami; Volkmar, Fred; Coflin, Megan; Booker, Shelley – Journal of Autism and Developmental Disorders, 2004
The purpose of this study is to provide a microanalysis of differences in adaptive functioning seen between well-matched groups of school-aged children with autism and those diagnosed as having Pervasive Developmental Disorder-Not Otherwise Specified, all of whom functioned in the mild to moderate range of intellectual impairment. Findings…
Descriptors: Adjustment (to Environment), Autism, Children, Multivariate Analysis
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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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Grigorenok, Elena L.; Klin, Ami; Pauls, David L.; Senft, Riley; Hooper, Catalina; Volkmar, Fred – Journal of Autism and Developmental Disorders, 2002
This study of hyperlexia in 80 children with developmental delays found no significant differences in the frequency of hyperlexia in girls compared with boys; a significantly elevated frequency of hyperlexia in children diagnosed with pervasive developmental disorders (PDD) compared with children with non-PDD diagnoses; and a similar range of IQ…
Descriptors: Child Development, Children, Developmental Delays, Incidence
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Volkmar, Fred R.; Klin, Ami; Pauls, David – Journal of Autism and Developmental Disorders, 1998
This paper examines the validity of Asperger syndrome as a condition apart from high-functioning autism. Potential differences between Asperger syndrome and autism is possible if both are strictly defined. The importance of genetic factors in Asperger syndrome is stressed. Research on the nosological validity of this condition and its relationship…
Descriptors: Asperger Syndrome, Autism, Clinical Diagnosis, Definitions
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Buitelaar, Jan K.; Van der Gaag, Rutger; Klin, Ami; Volkmar, Fred – Journal of Autism and Developmental Disorders, 1999
A study compared characteristics of individuals with mild retardation and clinically classified as autistic disorder (n=205), Pervasive Developmental Disorder Not Otherwise Specified (PDDNOS) (n=80), and other non-PDD disorders (n=174). Only a few items from the ICD-10 and DSM-IV discriminated the PDDNOS group from other disorders. Suggested…
Descriptors: Adults, Children, Classification, Clinical Diagnosis
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Arnold, L. Eugene; Aman, Michael G.; Martin, Andres; Collier-Crespin, Angie; Vitiello, Benedetto; Tierney, Elaine; Asarnow, Robert; Bell-Bradshaw, Felicia; Freeman, Betty Jo; Gates-Ulanet, Patricia; Klin, Ami; McCracken, James T.; McDougle, Christopher J.; McGough, James J.; Posey, David J.; Scahill, Lawrence; Swiezy, Naomi B.; Ritz, Louise; Volkmar, Fred – Journal of Autism and Developmental Disorders, 2000
This paper explains how the Autism Research Units on Pediatric Psychopharmacology (RUPP Autism Network) resolved common assessment problems including communication problems compromising use of the patient as informant, broad subject heterogeneity, difficulties in assessing low-end IQs, scarcity of autism-adapted cognitive and neuropsychological…
Descriptors: Autism, Clinical Diagnosis, Evaluation Methods, Pediatrics
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Landau, Edwina C.; Cicchetti, Domenic V.; Klin, Ami; Volkmar, Fred R. – Journal of Autism and Developmental Disorders, 1999
This study attempted to replicate previously reported increases in birth rates in March and August for individuals with autism. Statistical analysis of 904 cases revealed no significant seasonal effect. Samples were subcategorized into verbal and mute groups and again results failed to support the seasonal hypothesis. (Author/DB)
Descriptors: Autism, Birth Rate, Etiology, Statistical Analysis
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Klin, Ami; Lang, Jason; Cicchetti, Domenic V.; Volkmar, Fred R. – Journal of Autism and Developmental Disorders, 2000
This study examined the inter-rater reliability of clinician-assigned diagnosis of autism using or not using the criteria specified in the Diagnostic and Statistical Manual IV (DSM-IV). For experienced raters there was little difference in reliability in the two conditions. However, a clinically significant improvement in diagnostic reliability…
Descriptors: Autism, Clinical Diagnosis, Clinical Experience, Developmental Disabilities
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