N1-peak amplitudes covarying with BOLD signal (ANCOVA).

Activation patterns resulted from a group-level GLM. ‘Average effect N1’: T-contrast (T>3.29) testing for general effects of N1-amplitudes as a covariate. ‘Main effect N1’: F-contrast (F>6.48) testing for this covariate taking into account any differences between crossmodally manipulated n-back conditions. Both contrasts were inclusively masked (pp125. P-values are only reported if surviving voxel-level FWE correction.