This self-assessment grid for evaluating the quality of psychosocial skills (PSS) interventions was developed by Santé publique France based on its PSS guidelines published in 2022 and 2025. It allows for self-assessment based on intervention quality criteria, namely high-quality PS skills practices (structured, evidence-based, intensive, and diverse in nature), the implementation of high-quality PS skills interventions, and an educational environment conducive to the development of PS skills. For each general criterion of the PSI, operational criteria and practical procedures are identified, and their implementation must be evaluated within the institution to determine whether the required level is absent, partially achieved, or fully achieved, while specifying the actions taken.