Figure 5.

ERPs to targets and distractors. Difference waveforms formed by subtracting ERPs elicited by luminance decrement distractors (unattended) from those elicited by physically identical targets (attended), averaged over electrodes Pz and POz. Onsets of significant target-distractor differences are indicated by short vertical lines. Attentional modulation of the P3 component was the strongest and occurred earliest for attend-same conditions, and was latest and smallest for attend-opposite conditions. Attend-different conditions (Experiment 2) showed intermediate values. This pattern is consistent with behavioral performance as measured by sensitivity d′ and reaction time (Table 1).