Interpersonal violence victimisation of autistic adults: prevalence, correlates and impact

Research has consistently found high rates of victimisation amongst autistic children. There is emerging evidence that this disproportionate victimisation continues into adulthood, however this has not yet been thoroughly investigated. In this thesis, I aimed to examine the extent, nature and impact of interpersonal violence experiences among autistic adults and the factors that shape these experiences. In Chapter 1, I provide a brief overview of the prevalence and risk factors for interpersonal violence in the general population, theoretical approaches to understanding violence and a summary of the research that has been conducted in this area among autistic people. Chapter 2 outlines the methodological approach of this thesis, my reflections on the challenges and mitigations that occurred in the conduct of the research, a reflexivity statement and a summary of the role and impact of the autistic advisory group that I employed for the duration of this project. In Chapter 3, I conducted a systematic literature review to determine the current state of knowledge regarding the prevalence and correlates of interpersonal violence experienced by autistic people during adulthood. In Chapter 4, I conducted a secondary analysis using existing data collected as part of the Australian Longitudinal Study of Autistic Adults (ALSAA) to investigate the prevalence, traumatic impact and rates of disclosure of physical and sexual violence incidents reported by autistic adults in childhood and adulthood and compared this to non-autistic adults. I also examined whether there was a relationship between autistic traits and emotion regulation difficulties and exposure to sexual and physical violence. Chapters 5 to 7 present the findings from a mixed methods study designed for this thesis. In Chapter 5, I compared autistic and non-autistic adults on rates of sexual harassment, stalking and harassment, physical violence and sexual violence, and repeated and multiple violence during adulthood. I also compared gender patterns of violence among autistic and non-autistic adults and examined contextual factors. In Chapter 6, I investigated whether any individual characteristics that are common among autistic people (lower social competence, heightened compliance, emotion regulation difficulties or more ADHD features) were associated with poly-victimisation (experiencing multiple types of violence). In Chapter 7, I examined the nature and impact of interpersonal violence experiences, and possible factors shaping these experiences based on the first-hand accounts of autistic people. Finally, in Chapter 8, I discuss how the overall findings of this thesis contribute to the emerging evidence relating to the disproportionate victimisation of autistic people in adulthood by showing that (a) victimisation extends to a broad range of serious and criminal forms of violence which often go unreported, (b) gender differences in violence patterns appear narrowed among autistic people, (c) the impact of these experiences are exacerbated when reports of autistic victims of violence are dismissed or minimised, and (d) societal attitudes towards autism may contribute to increased vulnerability to violence and abuse. A multi-faceted approach is needed that goes beyond a focus on individual-level factors to address broader structural and systemic factors responsible for the disproportionate victimisation such as stigma, discrimination and epistemic injustice and includes educational strategies, public awareness campaigns, professional training, research efforts and policy change.