Fig. S3.

(A) Effects of block number on neural responses during the training phase. From 68–108 ms after speech onset, the MEG response is reduced in magnitude across the three blocks of the training phase (similar to the post- vs. pretest effect) in sensors shown as black circles on the topographic plot. Error bars indicate ± two within-subject SEMs; the topography represents the difference in MEG response between training blocks 3 and 1. (B) The difference in MEG (gradiometer) response between training blocks 3 and 1 also correlated across subjects with the magnitude of learning-related change in behavior (improvement in speech recognition post- vs. pretest for six-channel speech).