This thesis portfolio comprises of three parts: Part one – Systematic Literature Review The systematic literature review explored the effectiveness of interventions to change negative perceptions of adults with intellectual disabilities. A systematic search identified 19 studies detailing various interventions. A narrative synthesis of the findings is presented, incorporating methodological critique throughout. Conclusions from the evidence base are drawn, with implications for future research. Part two – Empirical Paper The empirical paper explored the impacts of a theatre company on perceptions and understandings of intellectual disabilities from multiple perspectives including; members of the theatre company with intellectual disabilities, significant people in their lives, and members of the wider community. A qualitative approach was adopted, particularly thematic analysis. Four superordinate and nine subordinate themes were identified, acknowledging the connectivity, normality and growth associated with the theatre company, and offering recommendations for similar organisations. The findings are discussed relative to theoretical and empirical literature, culminating in implications of the results and avenues for future research. Part three - Appendices The appendices provide supplementary information for parts one and two, and also includes an epistemological statement and a reflective statement.