ABCD Annual Releases

ABCD Annual Release Data are static, curated data sets that include minimally processed brain image volumes and tabulated structural MRI, diffusion MRI, resting-state fMRI and task fMRI results, as well as all non-imaging assessment data from the physical & mental health, neurocognition, substance use, biospecimens and culture & environment domains. Curated data are QA'd, then defined by an NDA Study and assigned a Digital Object Identifier (DOI). Researchers intending to use Annual Release data should take note of the appropriate Acknowledgement language to include in any public disclosure of results.

All personally identifiable information is removed from the data to ensure participant confidentiality and anonymity. Data can be accessed via the NDA by researchers who obtain a free NIMH Data Archive account. If you don't have an account already, you can create one here.

Differences between these original release contents and the latest Annual Release are documented in the Release Notes, available through the supporting documentation section of the ABCD Collection.


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All ABCD Annual Releases

Release Date
Curated Annual Release 3.0 11/02/2020
Curated Annual Release 2.0 3/26/2019
Interim Annual Release 1.1 10/31/2018
Curated Annual Release 1.0 2/12/2018

Visit this page for updates concerning Annual Release Data. Older Annual Releases are available only for the purpose of citing the contents, for those who conducted an analysis using that release.