Jeanette Alane Mumford

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.

May 5, 2024 | biorxiv.org | Michael I. Demidenko |Jeanette Alane Mumford |Russell A. Poldrack

AbstractEmpirical studies reporting low test-retest reliability of individual blood oxygen-level dependent (BOLD) signal estimates in functional magnetic resonance imaging (fMRI) data have resurrected interest among cognitive neuroscientists in methods that may improve reliability in fMRI.

Mar 20, 2024 | biorxiv.org | Michael I. Demidenko |Jeanette Alane Mumford |Russell A. Poldrack

AbstractEmpirical studies reporting low test-retest reliability of individual blood oxygen-level dependent (BOLD) signal estimates in functional magnetic resonance imaging (fMRI) data have resurrected interest among cognitive neuroscientists in methods that may improve reliability in fMRI.