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Prigge, Molly B. D.; Bigler, Erin D.; Lange, Nicholas; Morgan, Jubel; Froehlich, Alyson; Freeman, Abigail; Kellett, Kristina; Kane, Karen L.; King, Carolyn K.; Taylor, June; Dean, Douglas C., III; King, Jace B.; Anderson, Jeff S.; Zielinski, Brandon A.; Alexander, Andrew L.; Lainhart, Janet E. – Journal of Autism and Developmental Disorders, 2022
Intelligence (IQ) scores are used in educational and vocational planning for individuals with autism spectrum disorder (ASD) yet little is known about the stability of IQ throughout development. We examined longitudinal age-related IQ stability in 119 individuals with ASD (3-36 years of age at first visit) and 128 typically developing controls.…
Descriptors: Autism Spectrum Disorders, Intelligence, Cognitive Development, Scores
Sohyun An Kim; Connie Kasari – Journal of Autism and Developmental Disorders, 2025
While working memory (WM) is a powerful predictor for children's school outcomes, autistic children are more likely to experience delays. This study compared autistic children and their neurotypical peers' WM development over their elementary school years, including relative growth and period of plasticity. Using a nationally-representative…
Descriptors: Elementary School Students, Autism Spectrum Disorders, Students with Disabilities, Student Development
Woodard, Cooper R.; Van Reet, Jennifer – Journal of Autism and Developmental Disorders, 2011
Past research has focused on pretend play in infants with autism because it is considered an early manifestation of symbolic or imaginative thinking. Contradictory research findings have challenged the meta-representational model. The intent of this paper is to propose that pretend play is the behavioral manifestation of developing imaginative…
Descriptors: Imagination, Play, Autism, Teaching Methods

Eagle, Rita Simon – Journal of Autism and Developmental Disorders, 1985
Results of the study involving 16 quadriplegic children (9 months-12 years old) indicated that early cognitive milestones can be achieved by children severely physically disabled since birth and that general intellectual level may be more important than severity of the motor handicap in determining such achievement. (Author/CL)
Descriptors: Cerebral Palsy, Cognitive Development, Congenital Impairments, Developmental Stages

Woodyatt, Gail; Ozanne, Anne – Journal of Autism and Developmental Disorders, 1992
The communicative behaviors of 6 girls with Rett syndrome (ages 2-13) were evaluated. Findings indicated that all subjects were at a preintentional level of communication, which was consistent with their profound intellectual disability and their lack of demonstration of "means-end" behavior beyond Piagetian Sensorimotor Stage III.…
Descriptors: Children, Cognitive Development, Communication Skills, Developmental Stages

Morgan, Sam B. – Journal of Autism and Developmental Disorders, 1986
Findings from relevant research applying Piaget's theory to mental retardation, psychosis, and autism are reviewed. Many autistic individuals show an arrest in operative functions at the sensorimotor functions. The early arrest interferes with subsequent development of higher-level conceptual, symbolic, and social skills. (Author)
Descriptors: Autism, Cognitive Development, Cognitive Processes, Concept Formation

Holroyd, Sarah; Baron-Cohen, Simon – Journal of Autism and Developmental Disorders, 1993
Evaluation of 17 children with autism at the ages of 6 to 15 and then again at ages 13 to 25, suggested that, for the majority of people with autism, there may be little development of a theory of mind. For a minority, development may extend to the equivalent of a 3- to 4-year-old level by the teenage years. (JDD)
Descriptors: Adolescents, Autism, Beliefs, Children

Steele, Shelly; Joseph, Robert M.; Tager-Flusberg, Helen – Journal of Autism and Developmental Disorders, 2003
A longitudinal study investigated developmental change in theory of mind among 57 children (ages 4-14) with autism. Theory of mind tests were administered on an initial visit and one year later. Data indicated significant developmental improvement in theory of mind ability, which was primarily related to the children's language ability. (Contains…
Descriptors: Autism, Child Development, Cognitive Development, Developmental Stages