Abstract
Compared to their nonautistic peers, lower levels of life satisfaction have been reported by autistic individuals. It is unclear, however, whether autistic individuals with intellectual disability report similar levels of life satisfaction as autistic individuals without intellectual disability or which characteristics are associated with life satisfaction. This study sought to examine differences in levels of self-reported life satisfaction across those with and without intellectual disability and explore correlates of life satisfaction in a sample of 35 autistic youth with intellectual disability and 99 autistic youth without intellectual disability. No difference in self-reported life satisfaction was detected between autistic youth with and without intellectual disability. Greater self-reported life satisfaction was associated with higher self-determination for autistic youth without intellectual disability. For autistic youth with intellectual disability, greater self-reported life satisfaction was related to more frequent social participation, lower parent stress, and fewer unmet service needs. Unmet service needs and parent stress were significantly stronger correlates of life satisfaction for youth with intellectual disability compared to youth without intellectual disability. Although the sample size of autistic youth with intellectual disability was small, these findings suggest the importance of considering heterogeneity among individuals on the autism spectrum when seeking to understand their well-being.Lay abstractAutistic people report lower life satisfaction compared to people without autism. It is unclear whether autistic people with intellectual disability report similar levels of life satisfaction to autistic people without intellectual disability. In this study, we did not find a difference in levels of life satisfaction for autistic youth with intellectual disability compared to autistic youth without intellectual disability. We also identified factors that might promote better life satisfaction. Higher self-determination was related to higher life satisfaction for autistic youth without intellectual disability. For autistic youth with intellectual disability, more frequent social participation, lower parent stress, and fewer unmet service needs were associated with higher life satisfaction. Unmet service needs and parent stress were more strongly related to life satisfaction for youth with intellectual disability compared to youth without intellectual disability. Our findings suggest that taking a more individualized approach to support the well-being of autistic youth is important.