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Direct linkRaza, Sarah; Zwaigenbaum, Lonnie; Sacrey, Lori-Ann R.; Bryson, Susan; Brian, Jessica; Smith, Isabel M.; Reid, Kyle; Roberts, Wendy; Szatmari, Peter; Vaillancourt, Tracy; Roncadin, Caroline; Garon, Nancy – Journal of Autism and Developmental Disorders, 2019
This study examined the potential of the short form of the Quantitative Checklist for Autism in Toddlers (Q-CHAT-10) to identify autism spectrum disorder (ASD) in a high-risk sibling cohort. High-risk (HR; siblings of children diagnosed with ASD) and low-risk (LR; no family history of ASD) toddlers were assessed prospectively at 18 and 24 months…
Descriptors: Autism, Pervasive Developmental Disorders, Toddlers, At Risk Persons
Jitlina, Katia; Zumbo, Bruno; Mirenda, Pat; Ford, Laurie; Bennett, Teresa; Georgiades, Stelios; Waddell, Charlotte; Smith, Isabel M.; Volden, Joanne; Duku, Eric; Zwaigenbaum, Lonnie; Szatmari, Peter; Vaillancourt, Tracy; Elsabbagh, Mayada – Journal of Autism and Developmental Disorders, 2017
Although anxiety is frequently reported in children with autism spectrum disorder (ASD), existing anxiety scales are often psychometrically inappropriate for this population. This study examined the internal structure, reliability, convergent and discriminant validity of the Spence Children's Anxiety Scale-Parent Report (SCAS-P; Spence 1999) in…
Descriptors: Autism, Pervasive Developmental Disorders, Psychometrics, Children
Duku, Eric; Vaillancourt, Tracy; Szatmari, Peter; Georgiades, Stelios; Zwaigenbaum, Lonnie; Smith, Isabel M.; Bryson, Susan; Fombonne, Eric; Mirenda, Pat; Roberts, Wendy; Volden, Joanne; Waddell, Charlotte; Thompson, Ann; Bennett, Teresa – Journal of Autism and Developmental Disorders, 2013
The purpose of this study was to examine the measurement properties of the Social Responsiveness Scale in an accelerated longitudinal sample of 4-year-old preschool children with the complementary approaches of categorical confirmatory factor analysis and Rasch analysis. Measurement models based on the literature and other hypothesized measurement…
Descriptors: Factor Analysis, Validity, Measures (Individuals), Autism
Mirenda, Pat; Smith, Isabel M.; Vaillancourt, Tracy; Georgiades, Stelios; Duku, Eric; Szatmari, Peter; Bryson, Susan; Fombonne, Eric; Roberts, Wendy; Volden, Joanne; Waddell, Charlotte; Zwaigenbaum, Lonnie – Journal of Autism and Developmental Disorders, 2010
This study examined the factor structure of the Repetitive Behavior Scale-Revised (RBS-R) in a sample of 287 preschool-aged children with autism spectrum disorder (ASD). A confirmatory factor analysis was used to examine six competing structural models. Spearman's rank order correlations were calculated to examine the associations between factor…
Descriptors: Check Lists, Autism, Factor Structure, Young Children
Peer reviewedSzatmari, Peter – Journal of Autism and Developmental Disorders, 1992
This paper reviews 20 studies that investigated the internal or external validity of various subtypes of autistic spectrum disorders. At least three groups could be distinguished from autism on clinical grounds: an Asperger syndrome subtype, and two atypical subtypes characterized by either low intelligence quotient or high intelligence quotient.…
Descriptors: Classification, Clinical Diagnosis, Handicap Identification, Intelligence Quotient
Peer reviewedSzatmari, Peter – Journal of Autism and Developmental Disorders, 1992
This paper reviewed the psychometric properties of the DSM-III-R (Diagnostic and Statistical Manual III, Revised) criteria for autism. Results indicated that the criteria had, on average, very good sensitivity but much lower specificity. It is concluded that the DSM-III-R criteria act more like screening criteria than diagnostic criteria.…
Descriptors: Autism, Clinical Diagnosis, Diagnostic Tests, Educational Diagnosis
