This study aimed to investigate factors associated with a delayed autism spectrum (ASD) diagnosis when compared to children with either no or early ASD diagnosis. Among 893 children assessed for ASD before age 8, 39% had no ASD at baseline, of which 21% received a later ASD diagnosis. Autism symptoms, diagnostic history of other developmental…

The transition to adulthood can be a challenging time for adolescents with intellectual and developmental disabilities. Its complexity, however, may be magnified for families who have immigrated to the United States. This study examined the transition expectations and experiences of six first-generation, Latino parents and their transition-aged…

This paper provides an overview of five review studies that analyzed 92 single subject studies on the effectiveness of major augmentative and alternative communication (AAC) systems for individuals with developmental disabilities including autism. This paper offers recommendations useful for AAC decision-making points. Research on the…

Families of children with autism spectrum disorder (ASD) play a central role in selecting interventions for their children. Despite the importance of understanding the factors that motivate early decisions about treatment, the literature has concentrated little attention on how and why parents of young children with ASD make decisions about…

Background: It has been established that people with autism spectrum disorder (ASD) often have difficulties understanding spoken language. Understanding reflexive and clitic pronouns is vital to establishing reference-based inference, but it is as yet unclear whether such constructions pose specific difficulties for those with ASD. Pronoun…

Washington State University, Responsibility Opportunity Advocacy and Respect (WSU ROAR) is an inclusive 2-year residential postsecondary education program for students with intellectual and developmental disabilities. WSU ROAR is a recognized comprehensive transition program located in rural eastern Washington. Within the program, there are four…

Gender variance (GV) and autism spectrum disorder (ASD) frequently co-occur in clinical populations. We investigated GV in association with ASD characteristics in nonclinical children and in children with developmental/mental health diagnoses. In 6-12-year-olds (N = 2445; 51% birth-assigned boys), the Gender Identity Questionnaire for Children…

We directly assessed the broader aspects of sociability (social enjoyment, social motivation, social interaction skills and social discomfort) in individuals with Cornelia de Lange (CdLS), fragile X (FXS) and Rubinstein-Taybi syndromes (RTS), and their association with autism characteristics and chronological age in these groups. Individuals with…

Feeding problems are known to be an important clinical issue for children with autism spectrum disorder (ASD), but the majority of studies on this topic have been carried out on children preschool age and older. It is important to understand whether these difficulties begin prior to age 3 years, as well as what parameters are important to study…

Background: Providing medical and dental care for adults with developmental disabilities requires specialised care that includes caregiver's perceptions of processes of care as integral to informing care delivery. Method: We examined the reach and efficacy of a medical-dental clinic serving adults with developmental disabilities as part of a…

While significant evidence indicates that making complex choices and decisions contributes to self-determination, the authors found no studies to date in which the phenomenon of engaging students with disabilities in choosing their high school courses was examined as a dependent variable. This phenomenological study explored how course-selection…

Individuals with autism spectrum disorder (ASD) have higher rates of co-occurring diagnoses and use of psychotropic medication prescriptions than people with other developmental disabilities. Few studies have examined these trends in samples of people with intellectual and developmental disabilities (IDD) with and without ASD. Using a random…

Purpose: Play is a critical aspect of children's development, and researchers have long argued that symbolic deficits in play may be diagnostic of developmental disabilities. This study examined whether deficits in play emerge as a function of developmental disabilities and whether our perceptions of play are colored by differences in language and…

Video-based instruction (VBI) has a substantial amount of research supporting its use with individuals with autism spectrum disorder and other developmental disabilities. However, it has typically been implemented as a treatment package containing multiple interventions. Additionally, there are procedural variations of VBI. Thus, it is difficult…

When establishing eligibility for developmental disability (DD) services, definitions of specific diagnostic conditions, such as autism, impact policy. Under the Medicaid home and community-based waiver program, states have discretion in determining specific program or service eligibility criteria, the nature of supports to be provided, and the…