marginal significancep = 0.080
For correct trials, the waveform in the time range of the Ne/ERN showed a more negative mean amplitude for the 133‐SMI condition ( M = 0.62 μV, SE = 0.18 μV) than for the 250‐SMI condition ( M = 1.09 μV, SE = 0.18 μV), which, however, reached only marginal significance, t (20) = 1.84, p = 0.080, d = 0.402.