This study assessed the validity of the Social Communication Questionnaire (SCQ) in a sample of 69 adults, aged 18-40 years old. Participants included 21 adults diagnosed with an autism spectrum disorder (ASD) and intellectual disability (ID), and 48 individuals diagnosed with ID and no diagnosis of an ASD. The SCQ yielded a sensitivity of 0.71…

The repetitive behaviour questionnaire (RBQ) (Turner, 1995) is one of the three most commonly used interview/questionnaire measures of repetitive behaviour (Honey et al., in preparation). Despite this there is a scarcity of information concerning its structure, reliability and validity. The psychometric properties of the RBQ were examined when…

Early detection and intervention is essential for children with autism spectrum disorders (ASD). Therefore, we examined the reliability and validity of the Japanese version of the Modified Checklist for autism in toddlers (M-CHAT), a 23-item, yes-no questionnaire regarding early autistic symptoms completed by parents of children at 18-24 months of…

The Modified Checklist for Autism in Toddlers (M-CHAT) is a 23-item questionnaire used in primary screening of Autism Spectrum Disorder (ASD). The current studies examine the concurrent validity of the M-CHAT in its ability to predict 18-month-olds' performance on theory of mind and word learning tasks. In Experiment 1, infants' understanding of…

Diagnosing Asperger's syndrome (AS) in adults is difficult and efficient indicators for a precise diagnosis are important in the clinical setting. We examined the clinical characteristics of AS in 129 adults (median age, 32.0 years [range, 19-57]; 102 men and 27 women; AS group (n = 64; median age, 32.0 years [range, 19-50]; 50 men and 14 women),…

We assessed the reliability and validity of the discrete-trials teaching evaluation form (DTTEF), a 21-item checklist for assessing instructors conducting discrete-trials teaching (DTT). In Phase 1, six consultants in an applied behavior analysis program for children with autism rated the 21 components of the DTTEF with a mean of 6.2 on a 7-point…

Development and behavior during the first 2 years of life was assessed retrospectively by the parents to 23 adolescents and young adults with Asperger syndrome and 13 typically developing adolescents and young adults. The groups were matched on chronological age and the participants were within the normal range of intelligence. The questionnaire,…

To assess the performance of the Social Communication Questionnaire (SCQ) in identifying children with autism spectrum disorders (ASD), this study screened 268 children identified as receiving preschool special education services. Parent-reported ASD diagnosis, education department recorded autism special education classification, ADI-R autism,…