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Brierley, Noah J.; McDonnell, Christina G.; Parks, Kaitlyn M. A.; Schulz, Samantha E.; Dalal, Tyler C.; Kelley, Elizabeth; Anagnostou, Evdokia; Nicolson, Robert; Georgiades, Stelios; Crosbie, Jennifer; Schachar, Russell; Liu, Xudong; Stevenson, Ryan A. – Journal of Autism and Developmental Disorders, 2021
Restricted interests and repetitive behaviors (RRBs) are core symptoms of autism spectrum disorder (ASD), and commonly occur in attention-deficit/hyperactivity disorder (ADHD). Little is known about how RRBs manifest in ADHD. We quantified and compared factor structures of RRBs in children with ASD (n = 634) or ADHD (n = 448), and related factors…
Descriptors: Factor Structure, Behavior Problems, Repetition, Autism
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Camodeca, Amy; Hosack, Alexandra; Todd, Kylie Q. – Journal of Psychoeducational Assessment, 2019
The extant literature regarding psychometric properties of measures of subclinical adult autism traits is sparse. The current study investigated the validity and internal consistency reliability of the 26-item Autism Quotient (AQ-26), a self-report measure of autism traits, in a nonclinical young adult sample. Results indicated significantly…
Descriptors: Autism, Pervasive Developmental Disorders, Genetics, Symptoms (Individual Disorders)
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Grove, Rachel; Hoekstra, Rosa A.; Wierda, Marlies; Begeer, Sander – Autism: The International Journal of Research and Practice, 2017
Research has highlighted potential differences in the phenotypic and clinical presentation of autism spectrum conditions across sex. Furthermore, the measures utilised to evaluate autism spectrum conditions may be biased towards the male autism phenotype. It is important to determine whether these instruments measure the autism phenotype…
Descriptors: Gender Differences, Factor Analysis, Symptoms (Individual Disorders), Autism
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Kuenssberg, Renate; Murray, Aja L.; Booth, Tom; McKenzie, Karen – Autism: The International Journal of Research and Practice, 2014
The primary aim of this article was to provide a structural validation of the 28-item Autism Spectrum Quotient-Short Form questionnaire in a sample of adults with clinically diagnosed autism spectrum disorders ("n" = 148). Confirmatory factor analysis demonstrated that the proposed structure, comprising a second-order Social Skills…
Descriptors: Autism, Pervasive Developmental Disorders, Questionnaires, Test Validity
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Frazier, Thomas W.; Ratliff, Kristin R.; Gruber, Chris; Zhang, Yi; Law, Paul A.; Constantino, John N. – Autism: The International Journal of Research and Practice, 2014
Understanding the factor structure of autistic symptomatology is critical to the discovery and interpretation of causal mechanisms in autism spectrum disorder. We applied confirmatory factor analysis and assessment of measurement invariance to a large ("N" = 9635) accumulated collection of reports on quantitative autistic traits using…
Descriptors: Autism, Pervasive Developmental Disorders, Measures (Individuals), Factor Analysis
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Freeth, Megan; Sheppard, Elizabeth; Ramachandran, Rajani; Milne, Elizabeth – Journal of Autism and Developmental Disorders, 2013
The disorder of autism is widely recognised throughout the world. However, the diagnostic criteria and theories of autism are based on research predominantly conducted in Western cultures. Here we compare the expression of autistic traits in a sample of neurotypical individuals from one Western culture (UK) and two Eastern cultures (India and…
Descriptors: Foreign Countries, Cross Cultural Studies, Autism, Pervasive Developmental Disorders
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Lau, Winnie Yu-Pow; Gau, Susan Shur-Fen; Chiu, Yen-Nan; Wu, Yu-Yu; Chou, Wen-Jiun; Liu, Shih-Kai; Chou, Miao-Chun – Research in Developmental Disabilities: A Multidisciplinary Journal, 2013
The Autism Spectrum Quotient (AQ) has been widely used for measuring autistic characteristics in parents of children with autism spectrum disorders (ASD). Nonetheless, its psychometric validity is yet to be justified. This study tested the factor structure of the AQ by means of principal component analysis and confirmatory factor analysis using,…
Descriptors: Factor Analysis, Autism, Psychometrics, Factor Structure