Repeated measures of variance (ANOVAs) applied to the ERP response amplitudes and computed for consecutive windows of 100 ms across the cue-target interval confirmed the presence of a frontal-central-parietal sustained negativity by showing highly significant main effects of ATTENTION (attend versus interpret cues) between 400–1,900 ms post-cue on all electrodes covering medial frontal, central, and parietal scalp sites ( F [ 1 , 12 ] values between 9.3–78.1, all p- values < 0.01).
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Timing and sequence of brain activity in top-down control of visual-spatial attention.
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