James M. Bjork

Jan 15, 2025 | biorxiv.org | Jeanette Alane Mumford |Michael I. Demidenko |James M. Bjork |Hugh Garavan

AbstractIn task functional magnetic resonance imaging (fMRI), collinearity between task regressors in a design matrix may impact power. Researchers often optimize task designs by assessing collinearity between task regressors to minimize downstream effects. However, some methods intended to reduce collinearity during optimization and data analysis may fail, in some cases introducing unintended bias into the parameter estimates.

Dec 21, 2023 | mdpi.com | Lori Keyser-Marcus |Tatiana Ramey |James M. Bjork |Caitlin Martin

All articles published by MDPI are made immediately available worldwide under an open access license. No specialpermission is required to reuse all or part of the article published by MDPI, including figures and tables. Forarticles published under an open access Creative Common CC BY license, any part of the article may be reused withoutpermission provided that the original article is clearly cited. For more information, please refer tohttps://www.mdpi.com/openaccess.

Nov 7, 2023 | informahealthcare.com | James M. Bjork

We thank the families and children who participated, and continue to participate, in the ABCD study, as well as staff at the study sites who are involved in data collection and curating the data release. Data used in the preparation of this article were obtained from the Adolescent Brain Cognitive Development (ABCD) Study (https://abcdstudy.org), held in the NIMH Data Archive (NDA).

Nov 7, 2023 | tandfonline.com | James M. Bjork |Mina Kwon |Hyeonjin Kim |Jaeyeong Yang

AbstractBackground and objectives Use of psychotropic substances in childhood has been associated with both impulsivity and other manifestations of poor executive function as well as escalation over time to use of progressively stronger substances. However, how this relationship may start in earlier childhood has not been well explored.

Sep 14, 2023 | nature.com | David Houghton |James M. Bjork |Gretchen N. Neigh |Kathryn Cunningham

AbstractSignificant trauma histories and post-traumatic stress disorder (PTSD) are common in persons with substance use disorders (SUD) and often associate with increased SUD severity and poorer response to SUD treatment. As such, this sub-population has been associated with unique risk factors and treatment needs.