Fig 1.
A fixation point was first presented for 400 ms. Then, each Arabic numeral was presented for 1,000 ms. Participants were asked to press the space key as soon as possible. The ISI was 1,000 ms to 3,000 ms.
Fig 2.
Four-choice RT task procedures.
First, a fixation point was presented for 350 ms. Then, each stimulus was presented for 3,000 ms. Participants were required to press the keys as soon as possible. The minimum ISI was 300 ms.
Table 1.
Results of error rates, correct and erroneous RTs, and post-errors and post-corrects for the standard trials.
Table 2.
Spearman correlations of post-error (correct) RT, post-error slowing, and error-related ERPs.
Table 3.
Mean summary data for fatigue questionnaire subscales.
Table 4.
Spearman correlations between questionnaire and error-related ERPs (mean amplitudes of ERN and Pe).
Table 5.
Average ERN peak, ERN/CRN mean, and Pe/CPe mean amplitudes under the normal or fatigue condition.
Fig 3.
ERN/CRN at electrodes Fz, Cz, FC1, and FC2 in the two experiments.
(A) Response-locked averages for erroneous reactions in normal and fatigue experiments at electrodes Fz, Cz,FC1 and FC2. (B) Topographies for ERN and CRN at 40 ms post-response.(C) Topographies for ERN at 1–100 ms post-response.