The most thoroughly researched topic in relation to Autism Spectrum Disorders (ASD) is the evaluation of interventions. Despite there being systematic literature reviews identifying evidence-based interventions (EBIs) for students with ASD, it is not clear to what extent educational psychologists (EPs) are using EBIs in their practice. The first paper in this thesis is a systematic literature review exploring which school-based interventions are reported in educational and school psychology journals and highlights the challenges of applying research data to idiographic individual casework. The second paper in this thesis is an empirical study investigating the extent to which EPs are using EBIs in their practice and the factors which influence EPsâ decision-making when planning interventions for students with ASD. The survey findings indicate that EPs are using many EBIs for ASD; however, there are many they are unfamiliar with. The most salient factors influencing EPsâ decision-making when planning interventions for students with ASD include the studentâs individual needs and factors related to the school context. The third paper in this study discusses the dissemination of evidence to professional practice and looks at the implications of this research for individual EP roles, Educational Psychology Services and future research. Finally, a strategy for disseminating the findings will be outlined alongside a strategy for evaluating the impact of the dissemination.