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Development of Restricted and Repetitive Behaviors from 2-19: Stability and Change in Repetitive Sensorimotor, Insistence on Sameness, and Verbal Behaviors in a Longitudinal Study of Autism
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Nina Masjedi; Elaine B. Clarke; Catherine Lord – Journal of Autism and Developmental Disorders, 2025
This study examined trajectories of repetitive sensorimotor (RSM), insistence on sameness (IS), and verbal RRBs from ages 2-19 in a well-characterized longitudinal cohort. We also tested the factor structure of the ADI-R restricted and repetitive behavior (RRB) domain at age 19 and the inclusion of a verbal RRBs factor, in addition to previously…
Descriptors: Autism Spectrum Disorders, Symptoms (Individual Disorders), Behavior, Children
Trajectories of Autism Symptom Severity for Boys and Girls across Childhood
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Einat Waizbard; Emilio Ferrer; Meghan Miller; Brianna Heath; Derek S. Andrews; Sally J. Rogers; Christine Wu Nordahl; Marjorie Solomon; David G. Amaral – Autism: The International Journal of Research and Practice, 2025
Girls, more than boys, experience a decrease in the severity of autism symptoms during childhood. It is unclear, however, which specific autistic behaviors change more for girls than for boys. Trajectories of autism symptoms were evaluated using the Autism Diagnostic Observation Schedule-calibrated severity scores (ADOS-CSS). Change in the…
Descriptors: Autism Spectrum Disorders, Symptoms (Individual Disorders), Severity (of Disability), Gender Differences