Planned comparisons between ERP amplitudes at nine electrode sites in the SP time window (801–1357 ms after stimulus onset).

Footnote: Significant differences are indicated in bold. Alpha levels were Bonferroni-corrected for the number of post-hoc ANOVAs (9) and t-tests (9) that were conducted from p = .05 to p = .0056. For comparison of p values with standard p values of significance (.05, .01, .005, .001), the equivalent p value is given in the table, reached by multiplying the actual p value by the number of comparisons.