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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