Table 2.

The CNV amplitude values.

Intervals	Mean ± SD (FCz)	Mean ± SD (Cz)
−100 to 0 ms
CNV-NC	−3.35 μV ± 4.17	−2.20 μV ± 2.27
CNV-CC	−5.98 μV ± 5.68	−5.88 μV ± 4.51
CNV-SC	−9.24 μV ± 7.41	−8.40 μV ± 4.86
−200 to −100 ms
CNV-NC	−2.91 μV ± 3.72	−2.00 μV ± 4.17
CNV-CC	−4.95 μV ± 4.63	−5.04 μV ± 4.01
CNV-SC	−8.32 μV ± 6.62	−7.62 μV ± 4.81
−300 to −200 ms
CNV-NC	−2.74 μV ± 3.51	−1.97 μV ± 1.85
CNV-CC	−3.95 μV ± 3.72	−4.09 μV ± 3.64
CNV-SC	−7.11 μV ± 5.5	−6.39 μV ± 4.4
−400 to −300 ms
CNV-NC	−2.41 μV ± 3.25	−1.76 μV ± 1.89
CNV-CC	−3.22 μV ± 3.08	−3.28 μV ± 3.52
CNV-SC	−5.97 μV ± 4.26	−5.65 μV ± 4.33
−500 to −400 ms
CNV-NC	−2.18 μV ± 2.55	−1.77 μV ± 1.59
CNV-CC	−1.95 μV ± 2.93	−1.96 μV ± 3.52
CNV-SC	−4.49 μV ± 3.69	−4.15 μV ± 4.60

Mean CNV (contingent negative variation) amplitude values of the electrode shown in each condition studied. Abbreviations: NC, no cue condition; CC, central cue condition; SC, spatial cue condition; SD, Standard deviation; μV, microvolts, Intervals are referred from the onset of the target.