NDA Help Center

NDA Homepage

This is the NDA/NDAR homepage. From this page, you can navigate through our search tool or website to learn about NDA. You can also create an account, or login, to begin using NDA features.

Frequently Asked Questions

  • Simply log in, and you will be taken to your profile automatically. If you aren't, click on your username in the upper right.

  • In 2014 the NDAR infrastructure was expanded to include NDCT and RDoCdb, sharing data across the field of mental health. Although many of the functionality to work with the database is still operated through NDAR's original website, the NDA covers all domains.


  • NDA is short for NIMH Data Archive. This umbrella organization includes a variety of repositories sharing data generated primarily by NIH/NIMH-funded research projects including NDCT, RDoCdb, NDAR, the ABCD Study, and much more.

  • Imaging+ is an NDA term which encompasses all imaging related data including, but not limited to, images (DTI, MRI, PET, Structural, Spectroscopy, etc.) as well as neurosignal data (EEG, fMRI, MEG, EGG, eye tracking, etc.) and Evaluated Data.

  • The National Database for Autism Research (NDAR) is an NIH-funded research data repository that aims to accelerate progress in autism spectrum disorder (ASD) research through data sharing, data harmonization, and the reporting of research results.


Reset Password

NDAR provides a single access to de-identified autism research data. For permission to download data, you will need an NDAR account with approved access to NDAR or a connected repository (AGRE, IAN, or the ATP). For NDAR access, you need to be a research investigator sponsored by an NIH recognized institution with federal wide assurance. See Request Access for more information.

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This is a U.S. Government computer system, which may be accessed and used only for authorized Government business by authorized personnel. Unauthorized access or use of this computer system may subject violators to criminal, civil, and/or administrative action. All information on this computer system may be intercepted, recorded, read, copied, and disclosed by and to authorized personnel for official purposes, including criminal investigations. Such information includes sensitive data encrypted to comply with confidentiality and privacy requirements. Access or use of this computer system by any person, whether authorized or unauthorized, constitutes consent to these terms. There is no right of privacy in this system.

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Learn About NDAR

The NIMH Data Archive (NDA) is an infrastructure for sharing de-identified human subjects data with qualified researchers.  Data have been collected by hundreds of research projects across many scientific domains and harmonized to a common standard.  The NDA also provides tools, methods, and analysis capabilities enabling collaborative science and discovery.  Summary data is available to all.

The primary point of entry to the NDA is currently through the National Database for Autism Research (NDAR) website, which serves the autism research community.  All NDA repositories can be accessed through this website for data contribution and querying with other scientific communities, allowing for aggregation and secondary analysis of data.

Total Subjects with Shared Data in the NIMH Data Archive

Chart of Data in NDA

*Imaging+ includes imaging data and all neurosignal recordings data (e.g., eye tracking, EEG, EGG, etc).


Video Tutorials Questions - NDAHelp@mail.nih.gov