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Belva, Brian C.; Matson, Johnny L.; Hattier, Megan A.; Kozlowski, Allison M.; Bamburg, Jay W. – Research in Autism Spectrum Disorders, 2012
The "Autism Spectrum Disorders-Diagnosis for Adults" ("ASD-DA") is a standardized assessment used to measure autistic symptomatology in adults with intellectual disabilities (ID). In order to further establish the validity of this measure, convergent validity of the "ASD-DA" was established by comparing…
Descriptors: Severe Disabilities, Autism, Validity, Behavior Rating Scales
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Neal, Daniene; Matson, Johnny L.; Hattier, Megan A. – Journal of Mental Health Research in Intellectual Disabilities, 2014
The Autism Spectrum Disorder Observation for Children (ASD-OC) is a 45-item observation scale used to assess autistic symptomatology. The reliability of this measure has been established in previous research; therefore, the purpose of this study is to evaluate its validity among a sample of children (1-15 years). The large correlation between the…
Descriptors: Test Validity, Observation, Children, Pervasive Developmental Disorders
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Matson, Johnny L.; Mahan, Sara; Hess, Julie A.; Fodstad, Jill C.; Neal, Daniene – Research in Autism Spectrum Disorders, 2010
Previous studies analyzed the reliability as well as sensitivity and specificity of the Autism Spectrum Disorder-Diagnostic for Children (ASD-DC). This study further examines the psychometric properties of the ASD-DC by assessing whether the ASD-DC has convergent validity against a psychometrically sound observational instrument for Autistic…
Descriptors: Verbal Communication, Nonverbal Communication, Autism, Validity
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Rojahn, Johannes; Wilkins, Jonathan; Matson, Johnny L.; Boisjoli, Jessica – Journal of Applied Research in Intellectual Disabilities, 2010
Challenging behaviour may not be part of the diagnostic criteria for Autistic Disorder but they are frequently exhibited by children and adults with this condition. Levels of challenging behaviours are highest in individuals with an autism spectrum disorder (ASD) and co-occurring intellectual disability (ID). The sample for this study consisted of…
Descriptors: Behavior Problems, Mental Retardation, Autism, Test Validity
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Matson, Johnny L.; Gonzalez, Melissa; Wilkins, Jonathan – Research in Autism Spectrum Disorders, 2009
The Autism Spectrum Disorders-Diagnostic for Children (ASD-DC) is a 40-item Likert format scale designed to serve in the diagnosis of children and adolescents from 2 to 16 years of age. The reliability and factor structure of the scale have been established in previous research. Studies 1 and 2 were designed to evaluate the validity of the measure…
Descriptors: Autism, Asperger Syndrome, Validity, Factor Structure
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Matson, Johnny L.; Hess, Julie A.; Mahan, Sara; Fodstad, Jill C. – Research in Autism Spectrum Disorders, 2010
The purpose of this paper was to further establish the validity of the Autism Spectrum Disorder-Diagnostic for Children (ASD-DC). The methodology consisted of testing the similarity of findings between the ASD-DC and the Autism Diagnostic Interview-Revised (ADI-R), which proved to be statistically significant for subscale content scores on social,…
Descriptors: Medical Evaluation, Autism, Pervasive Developmental Disorders, Measures (Individuals)
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Matson, Johnny L.; Dempsey, Timothy; Rivet, Tessa – Research in Autism Spectrum Disorders, 2008
Asperger's syndrome (AS), first diagnosed in 1944, and has only recently begun to receive a great deal of research attention. An emerging controversy has been whether AS is a distinct condition from high functioning autism (HFA), and if so, can it be reliably and validly diagnosed. While measures designed specifically to aid in the screening and…
Descriptors: Autism, Asperger Syndrome, Symptoms (Individual Disorders), Identification