Fig. 6.

Interaction between TMS site and chunking position. The direct comparison of within-chunk TMS and between-chunk TMS for the three stimulation sites shows a strong trend toward a significant interaction (P = 0.058) between TMS site (i.e., no TMS, M1, and preSMA) and chunk position (i.e., within chunks, between chunks) when switching toward the right hand. Note that TMS over M1 delayed RTs at both chunk positions, whereas TMS over preSMA only delayed RTs when applied between chunks. Error bars show standard errors of measurement.