High level overview of assessment domains in the ABCD Study (click on image, below, to enlarge)

The ABCD protocol is a comprehensive set of physical, cognitive, social, emotional, environmental, behavioral, and academic assessments, as well as multimodal neuroimaging and biospecimen collection for hormonal, genetic, epigenetic, environmental exposure, and substance use analysis. These assessments are anticipated to be done annually (non-imaging) or biannually (imaging and bioassays) for 10 years. Participants also undergo a brief, mid-year phone interview. The decision was made to discontinue administration of the Youth 10 item Delinquency Scale starting at the 4-year follow-up. Note that the question from the Delinquency Scale about police contact is now contained in the Culture & Environment workgroup, instead of the Mental Health workgroup. Please visit the ABCD wiki for more information.

Click on the image, below, to view a timeline of events:

Curated data are released annually via the NIMH Data Archive. For more information, visit the data sharing page.

Interested in using the ABCD MRI protocol for your non-ABCD study?  Click here for more information.