Statistical power and prediction accuracy in multisite resting-state fMRI connectivity

Christian Dansereau, Yassine Benhajali, Céline Risterucci, Emilio Merlo Pich, Pierre Orban, Douglas L. Arnold, Pierre Bellec

Abstract: Highlights•Small to moderate systematic site effects in fMRI connectivity.•Small impact of site effects on the detection of group differences for sample size >100.•Linear regression of the sites prior to multivariate prediction do not improve prediction accuracy.