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. Author manuscript; available in PMC: 2010 Oct 18.
Published in final edited form as: Psychophysiology. 2010 Jan 11;47(3):410–414. doi: 10.1111/j.1469-8986.2009.00948.x

Figure 2.

Figure 2

The response locked waveforms for correct and incorrect trials and summary bar graphs of the ERP findings. A. The grand average ERPs time locked to the manual response for simultaneous offset (no mask) trials, left, and delayed-offset trials, right, for correct (solid lines) and incorrect responses (dashed lines). Electrode pairs F3/4 and P3/4 are shown to illustrate the typical ERN distribution was observed. B. Bar graphs showing the stimulus-locked N2pc amplitude (contralateral minus ipsilateral amplitude, 200–375 ms poststimulus) and the response-locked ERN amplitude (incorrect minus correct amplitude, 0–100 ms postresponse) for simultaneous offset and delayed-offset masking trials. The error bars show the standard error of the mean amplitude.