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===== Adolescent Brain Cognitive Development (ABCD) Study =====

==== Overview ====
The Adolescent Brain Cognitive Development (ABCD) Study is the largest long-term study of brain development and child health in the United States. The National Institutes of Health (NIH) funded leading researchers in the fields of adolescent development and neuroscience to conduct this ambitious project. The ABCD Research Consortium consists of a Coordinating Center, a Data Analysis, Informatics & Resource Center, and 21 research sites across the country (see map), which have invited over 11,000 children ages 9-10 to join the study. Researchers will track their biological and behavioral development through adolescence into young adulthood. For more information about the ABCD study, please visit [[https://abcdstudy.org]]

==== ABCD at IBG ====
The Institute for Behavioral Genetics (IBG) at the University of Colorado Boulder plays an active role in the Adolescent Brain Cognitive Development (ABCD) Study, with CU Boulder serving as one of 21 research sites nationwide. In collaboration with the Institute of Cognitive Science, IBG recruits and longitudinally assesses participants and conducts research using ABCD data. IBG is also one of the study’s designated twin sites, contributing a population-based twin sample that supports investigations of genetic and environmental influences on development. Beyond data collection, IBG researchers have helped guide and curate the broader ABCD data resource through service on consortium workgroups, including the Linked External Data, Physical Health, Neurocognition, and Genetics workgroups. Through these activities, IBG contributes to both the collection of ABCD data and the development of the publicly available dataset used by researchers worldwide.

==== Data Access ====

For the current ABCD 7.0 data release, access to controlled ABCD data is managed through the NIH Brain Development Cohorts (NBDC) Data Hub. Researchers must complete a Data Use Certification (DUC), required Responsible Data and Biospecimen Use Training, and attest that they meet NIH data-security requirements. IBG maintains a group DUC through which members of IBG can gain authorization to access and analyze ABCD data. NIH requires that ABCD data storage and analyses must be done on computing systems which meet or exceeds specific standards for data security. To meet these standards, all IBG DUC members __must__ utilize specific Research Computing (RC) resources when accessing, storing, or analyzing ABCD data. For any questions regarding ABCD data access at IBG, please contact Harry.Smolker@colorado.edu.

  * **__Data Use Certificate (DUC)__**: You must be listed on an active DUC to view or analyze the ABCD data, and to publish or present the data at a conference. Only people on this DUC or another active DUC may access or view the individual-level data. Please contact Harry.Smolker@colorado.edu if you are interested in being added to IBG's group DUC.
 

  * **__Responsible Data and Biospecimens Use Training__**: To access ABCD data, you will first need to complete training in responsible use of the data on the NBDC Hub (https://nbdc-datashare.lassoinformatics.com/). To access this training, you will need to create an account on the NBDC hub, and it must use the same email address that is listed on the DUC. Once you have completed this training, please let Harry.Smolker@colorado.edu and Jeff.Lessem@colorado.edu know.

  * **__Research Computing (RC)__**: All individuals on IBG's DUC must only access, store, and analyze data using CU-Boulder's RC services. Specifically, data is stored on RC's secure PetaLibrary system and all access and analyses of the data must be done using RC's Alpine computing cluster. For more information on RC, including how to get an account, please visit https://www.colorado.edu/rc/


==== Resources ====
  * [[https://abcdstudy.org]]
  * [[https://abcd.deapscience.com/#/home | Data Exploration and Analysis Portal (DEAP)]]
  * [[https://www.nbdc-datahub.org/abcd-study | NIH Brain Development Cohorts (NBDC) Data Hub]]
  * [[https://o365coloradoedu-my.sharepoint.com/:f:/r/personal/hasm6947_colorado_edu/Documents/IBG%20Data%20Management/ABCD/ABCD%20Data%20Group%20Access%20Resources?d=w948fd98ff87f4b08b912fb923005a405&csf=1&web=1&e=JO2M3i | ABCD data access at IBG]] (*only individuals who are listed on a current or pending DUC will be able to access this folder)