This study investigates associations between initial levels and change in the quality of the relationships youth with intellectual disabilities (ID) share with their parents and teachers, and changes in their levels of depression over time. A sample of 395 youth with mild (48.3%) and moderate (51.7%) ID, aged between 11 and 22 (M = 15.69), were…

Background: People with intellectual disability may be at elevated risk of adverse consequences of substance use. This study outlines the prevalence of, and factors associated with, substance use in young people with and without intellectual disability. Method: Secondary analysis was undertaken of the Next Steps annual panel study, which follows a…

Objectives: Self-description research on athletes with intellectual disabilities (ID) is under investigated. The specific aims in this paper are (a) to identify the differences in physical self-concept and body image by Unified Sports experiences, and (b) to investigate predictors of physical self-concept. Methods: Participants included 89 Special…

By adulthood, most males with fragile X syndrome (FXS) require support to navigate day-to-day settings. The present study cross-sectionally: (1) characterized the profile of daily living skills in males with FXS and (2) examined associated participant characteristics (i.e., fragile X mental retardation protein [FMRP] expression, nonverbal…

This study examined rates of and contributing factors to self-determination among young adults with autism spectrum disorder. Caregivers of young adults with autism spectrum disorder, 16-25 years, from five Autism Treatment Network sites completed surveys about their young adults' transition experiences including the American Institutes for…

Background: In this study we aimed to explore how intelligence and executive functioning are related to decision-making regarding social situations in persons with mild ID. Method: We studied 80 vocational school students with mild ID; the controls were 80 students of a similar age. We assessed decision-making ability with the Important Life…

It is well established that successful transitions into adulthood vary greatly by numerous factors (e.g., race, gender); yet, understanding of ways that disability-related factors shape transitions into adulthood are less clear. While individuals with disabilities, generally, often fall short of their non-disabled peers in achieving many early…

Prior studies have shown that young adults with severe physical and multiple disabilities are less likely to complete upper secondary education. This study aimed to identify whether these students' type of multiple disability, gender, location and literacy skills were associated with completion of upper secondary education. The participants were…

This study examined the degree to which the three of the four essential characteristics of self-determination (autonomy, self-realization, and psychological empowerment) predicted quality of life-related adult outcome constructs using secondary analysis of data from the National Longitudinal Transition Study-2. The pattern of predictive…

This study uses data from the National Longitudinal Transition Study 2012 to examine predictors at the individual, family, and school levels associated with parental expectations toward postsecondary education among students with significant support needs, including those with autism spectrum disorder, intellectual disability, and multiple…

This dissertation consists of four chapters. Chapter 1 provides an overview of the evolved concept of disability and an introduction of the support needs construct to special education and related disciplines, as well as a summary of studies that examined the support needs of people with intellectual disability. This Chapter also presents research…