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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.

Warning Notice

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.

You have logged in with a temporary password. Please update your password. Passwords must contain 8 or more characters and must contain at least 3 of the following types of characters:

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Request an Account
* Required field
Minimum of 5 characters
Password must be a minimum of 8 characters and contain 3 of the following 4:
Capital letter, lowercase letter, special character, numeral
State required for US applicants.
Postal Code required for the United States
Please include a description of your interest, and your role on the project relevant to NDAR. If applicable, please include the grant you are affiliated with including the grant title, grant number and PI.
By providing this information now, you will be ready when the NIMH Data Archive begins supporting authentication using your eRA Commons account and password.
Access Levels

The NIMH Data Repositories access levels are defined as follows:

Data Access (Query/Download)

NDAR, NDCT, RDoCdb, and PediatricMRI shared data requires the completion of the Data Use Certification, which is signed by the lab’s Principal Investigator and your institution's signing official and approved by the appropriate Data Access Committee. Please note that access to individual collections for data submission is granted by the collection owner/administrator instead of this form.

Data Submission

Those responsible for the submission of data to the NIMH Data Archive require the completion of the Data Submission Agreement. Please note that access to individual collections for data submission is granted by the collection owner/administrator instead of this form.


For those needing access to generate a Global Unique Identifier (GUID) specific to each study participant, please select the GUID Tool describing why you need this access. No additional documentation is required.

Only those responsible for sharing data on behalf of the institution (usually the Principal Investigator (PI) or Data Coordinating Center (DCC) Manager) will be required to complete the Data Submission Agreement. Others may be assigned permission to submit data by the Collection Owner/Admin, which would not require the completion of this form.