Abstract
This study investigated how autistic pupils' psychological, social and educational outcomes differed in contrasting mainstream provisions. Using a three-year longitudinal quasi-experimental design, outcomes were compared across three placements: placement in a specialist resource centre, mainstream placement in specialist resource centre host schools, and placement in mainstream schools without a specialist resource centre. Autistic pupils (N = 119, aged 11-14) and matched non-autistic peers (N = 119) completed surveys and schools provided attainment, attendance, and exclusion data. Placement type showed no main effects on psychosocial outcomes in mixed analyses of variance, indicating limited evidence for differential change by placement alone, but hierarchical regressions indicated that specialist resource centre placement was statistically associated with higher academic attainment and stronger school belonging than mainstream schools without a specialist resource centre, and greater perceived teacher support than mainstream placement in specialist resource centre host schools. Attendance disparities for specialist resource centre pupils were smaller than national averages for autistic pupils, though attendance remained below whole-school averages. Perceived peer and teacher support were most strongly associated with positive outcomes across models, highlighting relational inclusion as a potential mechanism. Findings underscore the value of positive relationships in fostering belonging, reducing disparities, and promoting well-being for autistic pupils. Overall, specialist resource centre approaches may be associated with academic and belonging advantages, while relational inclusion appears central to positive outcomes.Lay abstractThis study explored how support through specialist resource centres can help autistic pupils in mainstream secondary schools. Specialist resource centres are supportive spaces within regular schools that offer extra help, trained staff who understand autism, and a calm environment, while also keeping pupils included in the wider school community. Although national policies aim to make schools more inclusive, many autistic pupils still face challenges such as anxiety, social challenges and school absence. This study followed 119 autistic pupils aged 11-14 across seven schools for three years. It compared three groups: pupils in specialist resource centres, autistic pupils in the same schools but not placed in the Centres and autistic pupils in mainstream schools without a Centre. Comparisons were also made with non-autistic pupils from the same schools. The study found that specialist resource centre placement was linked to better academic progress for pupils in this sample and a stronger sense of belonging than other placements. Even so, placement on its own did not lead to clear differences in most areas of well-being, and some results were based on smaller samples, so they should be treated carefully. Specialist resource centre pupils also felt more supported by teachers, and they reported higher levels of happiness and fewer peer problems than non-autistic peers. However, because this information was gathered at one point in time, the findings do not prove that placement caused these differences, though they leave open the possibility that placement may have had an impact. Pupils in specialist resource centre placements appeared to have better attendance than autistic pupils nationally, although attendance was still not as high as whole-school averages. The most important factor linked to positive outcomes was feeling supported by teachers and classmates. These results suggest specialist resource centres may offer the greatest benefits within mainstream schools, when they help pupils build supportive peer and teacher relationships.