["British Journal of Learning Disabilities, Volume 54, Issue 1, Page 28-38, March 2026. ", "\nABSTRACT\n\nBackground\nCo‐research methods have improved the inclusion of people with intellectual and developmental disabilities on research teams. This article presents the evaluation of the DS‐TO‐THE‐MAX Co‐Research Program to assess program process and outcomes. The team consists of co‐researchers with Down syndrome and academic researchers who collaborate on health research projects important to the Down syndrome community.\n\n\nMethods\nWe developed a logic model to map program components and outcomes. From the model, we identified and assessed five key areas. We interviewed seven co‐researchers with Down syndrome and conducted a focus group with research assistants based on key areas. We analysed using thematic analysis.\n\n\nFindings\nWe found that mutual recognition of contributions and multiple communication modes facilitated engagement and team connectedness. Co‐researchers reported their interests and experiences drove contributions, and they saw benefits from collaborating with each other. Co‐researchers noticed accessible team practices and described self‐advocating. Though co‐researchers did not explicitly identify as researchers, they reported making decisions and feeling heard and valued. They shared barriers such as difficult vocabulary.\n\n\nConclusions\nOur evaluation showed that relationships and co‐researchers' experiences and interests were central to research engagement. Co‐research team evaluations are feasible mechanisms to improve inclusive collaboration for research team members with intellectual and developmental disabilities.\n"]