Accessible Methods for Participatory Research: Insights From a Mental Health Study Involving Co-Researchers With Intellectual Disabilities

This paper presents a participatory research project in which co-researchers with intellectual disabilities were actively involved in studying factors that contribute to good mental health. Through a five-step, multi-method design incorporating a systematic review, expert interviews, focus groups, a Delphi survey and dissemination workshops, we integrated academic and experiential knowledge at multiple stages of the research process. Co-researchers contributed to the development of accessible study materials, supported qualitative data analysis, and co-authored publications and presentations. We employed creative and inclusive methods such as visual rating tools, easy-to-read materials, and gamified approaches to support accessibility and engagement. Regular meetings, collaborative decision-making, and mutual learning formed the foundation of our participatory process. The aim of this paper is to provide a transparent, practical account of our participatory approach, highlighting its benefits and challenges. We reflect on team dynamics, methodological adaptations and structural barriers that limited full inclusion, such as the formal employment restrictions of co-researchers imposed by social systems. Our findings suggest that participatory research with people with ID is not only feasible, but also methodologically and ethically enriching. We argue that such an approach enhances the relevance, applicability and impact of qualitative research, particularly in the field of mental health. By sharing concrete strategies and critical reflections, this paper contributes to the growing discourse on inclusive and participatory research practices. It also offers practical guidance for future projects involving co-researchers with ID. The paper intentionally combines academic and accessible writing elements to reflect the participatory principles underlying the project and to encourage discussion about accessibility within academic publishing.