Participant Development Key Research Themes Richard Bailey and Graham Ross This document offers a summary of relevant research findings that relate to participant development in sport. It does not aim to provide a comprehensive review. Rather, it highlights and discusses certain aspects of participant development that relate to the UK Coaching Framework. Each section addresses a specific issue. It explains the importance or relevance of the issue, summarises research findings, and suggests implications for coaches and /or coach educators/developers. Finally, each section offers a useful source of further information on the topic. The document is extracted from a wider review of the Participant Development Literature commissioned by sports coach UK.