This report provides updated prevalence estimates for diagnosed autism spectrum disorder, intellectual disability, and other developmental delay among children 3-17 years from the 2019-2021 National Health Interview Survey, with differences in prevalence examined between years and by sex, age group, and race and Hispanic origin. Estimates are also…

This systematic review examined 14 U.S. studies published since 2000 reporting prevalence estimates for intellectual disability (ID) or developmental disability (DD). Prevalence rates for children were between 11.0 and 13.4 per 1,000 for ID and between 45.8 and 69.9 per 1,000 for DD using data from 2010 or later. A 2015 Ohio study of adults…

Two non-U.S. quasi-experimental studies reported Active Support training was associated with increased engagement in individuals with IDD, but no randomized controlled trials (RCTs) exist. We evaluated effects of Active Support training on staff assistance, and social and nonsocial engagement in 75 individuals with intellectual and developmental…

The Centers for Disease Control and Prevention (CDC) estimates that about 1 in 88 children has been identified with an autism spectrum disorder (ASD). CDC's estimate comes from the Autism and Developmental Disabilities Monitoring (ADDM) Network, which monitors the number of 8-year-old children with ASDs living in diverse communities throughout the…

Different moderators/mediators of risk are involved in developmental dyslexia (DD), but data are inconsistent. We explored the prevalence of season of birth and its association with gender and age of school entry in an Italian sample of dyslexic children compared to an Italian normal control group. The clinical sample included 498 children (345…

Although many researchers have investigated emotional and behavioral difficulties in individuals with Williams syndrome, few have used standardized diagnostic assessments. We examined mental health problems in 92 adults with Williams syndrome using the Psychiatric Assessment Schedule for Adults with Developmental Disabilities--PAS-ADD (Moss,…

Future life planning is a growing concern among families with children with disabilities. This article presents a needs assessment evaluating feasibility of a new model for future life planning for family caregivers, Lifetime Assistance, which will provide ongoing planning and monitoring for individuals with intellectual and developmental…

A functional polymorphism in the promoter of the gene encoding monoamine oxidase A has been associated with problem behavior in various populations. We examined the association of MAOA alleles in adult males with intellectual/developmental disabilities with and without established histories of problem behavior. These data were compared with a…

The Movement Assessment Battery for Children (M-ABC) is one of the most accepted tools, both in clinical practice and in research, for the diagnosis of Developmental Coordination Disorders (DCDs) in children. The present study aimed to: (1) establish the construct validity of M-ABC in Israel by comparing the motor performance of typically…

This study examined factors influencing involvement of siblings of individuals with developmental disabilities in future planning and their expectation of future caregiving. The sample consisted of 139 adult siblings recruited from an online sibling list and a sibling conference. Results indicated that few families made plans or involved siblings…

Whereas some scales exist for assessing aggression in typically developing children, they do not give a detailed analysis, and none is available for populations with developmental disabilities (DD). Parents of 365 children with DD completed the Children's Scale of Hostility and Aggression: Reactive/Proactive (C-SHARP), which surveys the severity…

The "Down syndrome advantage" is the popular conception that children with Down syndrome are easier to rear than children with other developmental disabilities. We assessed whether mothers of children with developmental disabilities would demonstrate a consistent Down syndrome advantage as their children aged from 12 to 18 years. Results did not…

Williams syndrome (WS) is a developmental disorder characterized by relatively spared verbal skills and severe visuospatial deficits. Serious impairments in mathematics have also been reported. This article reviews the evidence on mathematical ability in WS, focusing on the integrity and developmental path of two fundamental representations,…

This study compared the patterns of sensory processing among children with autism spectrum disorder (ASD), attention deficit and hyperactivity disorder (ADHD), and children without disabilities. Parents reported on the frequency of sensory processing issues by completing the Chinese Sensory Profile (CSP). Children with disabilities (ASD or ADHD)…

Researchers associate an insistence on sameness or lack of behavioral flexibility with autism and Asperger syndrome, but few studies have sought to identify specific situations in which individuals insist on sameness. Along these lines, we developed the "Behavioral Flexibility Rating Scale" (BFRS) and conducted an Internet survey of parents of…