The National Database for Autism Research (NDAR) is an NIH-funded research data repository that aims to accelerate progress in autism spectrum disorders (ASD) research through data sharing, data harmonization, and the reporting of research results. NDAR also serves as a scientific community platform and portal to multiple other research repositories, allowing for aggregation and secondary analysis of data. For access to detailed human subjects data, you must be sponsored by an NIH recognized institution with a Federal Wide Assurance and have a research related need to access NDAR data. NDAR federated repositories have their own access requirements. You do not need approved access to look at summary information.