The social and motor context in which restricted and repetitive behaviors (RRBs) occur in autism and their relationship to social traits are not well-understood. Participants with and without autism completed tasks that varied in social and motor engagement and RRB frequency was measured. Motor and verbal RRBs were most common, RRBs varied based…

Statistical learning-extracting regularities in the environment-may underlie complex social behavior. 124 children, 56 with autism and 68 typically developing, ages 2-8 years, completed a novel visual statistical learning task on an iPad. Averaged together, children with autism demonstrated less learning on the task compared to typically…

How do school professionals distinguish between social, communication, and behavioral differences observed in typically developing English language learners (ELLs) and those ELL students with autism spectrum disorder (ASD)? Informed consideration is necessary to avoid inaccurate identification and to ensure appropriate supports are provided;…

Background: Despite extensive efforts, the causes of autism remain unknown. Advancing paternal age has been associated with various neurodevelopmental disorders. We aim to investigate three unresolved questions: (a) What is the association between paternal age and autism spectrum disorders (ASD)?; (b) Does paternal age moderate the genetic and…

The behaviours of infants were observed using home videos, in an attempt to identify social difficulties characteristic of infants with autistic disorder. Three groups of infants were analysed: 15 infants who had later been diagnosed with autism, 15 infants who had a developmental or language delay, and 15 typically developing infants. Social…

This study aimed to investigate the relationships between abilities to initiate and respond to joint attention and symptoms of autism that have, and have not, been theoretically linked to joint attention. Participants were 51 boys and five girls with autistic disorder, aged between 2 years and 6 years 5 months. Measures of joint attention…

Analysis of home videotapes of autistic and normally developing children's first-year birthday parties found that autistic children displayed fewer social and joint attention behaviors and more autistic symptoms. Four behaviors (pointing, showing objects, looking at others, and orienting to name) correctly classified 10 of 11 autistic children and…

Background: Prader-Willi syndrome (PWS) is associated with a characteristic behavioural phenotype whose main features are, alongside compulsive hyperphagia, deficits in social behaviour: social withdrawal, temper tantrums, perseverative speech and behaviour, mental rigidity, stereotyped behaviour, impulsiveness, etc. Similar symptoms may also be…

This observational study of the social interactions of 16 children with autism or Down syndrome in their homes found that differences in the frequencies and complexities of children's behaviors depended on behavioral intent in both groups. Socially intended behaviors were less frequent, less self-initiated, and less complex in children with…

A study compared 143 girls (ages 6-14) with Rett syndrome with 85 girls with severe mental retardation on the Developmental Behavior Checklist. Girls with Rett syndrome presented more "autistic relating" and fewer antisocial behaviors. When compared to children with autism, they did not present with classic autistic behavioral features.…

This study, based on observation of 28 children with autism in an integrated preschool, explored whether differing levels of autistic behavior were associated with the presence of nondisabled children or with the presence of other children with autism. Results indicated significantly decreased levels of autistic behavior corresponding to the close…

Ten parents of preschoolers with autism and 10 parents of typical preschoolers were given the Detection of Autism by Infant Sociability Interview, which elicits reports on 19 aspects of social engagement characteristics. Findings indicate that infants with autism had marked limitations in both person-to-person and person-person-object social…

Social skills and levels of inappropriate assertiveness/impulsiveness were assessed using the Matson Evaluation of Social Skills with Youngsters, with 17 autistic children (ages 2-21) and 17 matched nonautistic children. Significant differences in both appropriate and inappropriate social behaviors were found. Results suggest the importance of…

Two children (ages seven and eight) with autism and moderate mental retardation, who engaged in stereotypic behavior, were studied to investigate the effects of social interaction with peers. Results found that when peers made social initiations and the children engaged in social interaction, collateral decreases occurred in their stereotypic…