The NIMH Data Archive (NDA) and National Database for Autism Research (NDAR) is a secure research data repository promoting scientific data sharing and collaboration among autism spectrum disorder (ASD) investigators. The goal of the project is to accelerate scientific discovery through data sharing, data harmonization and the reporting of research results. NDAR currently has data from over 25,000 research participants available to qualified investigators.

This resource also host the data releases for: Adolescent Brain Cognitive Development Study (ABCD), Research Domain Criteria Database (RDoCDb), and National Database for Clinical Trials Related to Mental Illness (NDCT).