Posner task results

The document summarizes a study that investigated how attention modulates the P1 ERP component. 6 participants completed a spatial cueing task while EEG was recorded. The study found that: 1) P1 amplitude was stronger over electrode sites contralateral to the attended visual field, suggesting attention increases neural sensitivity. 2) P1 onset latency was earlier for attended stimuli, suggesting attention optimizes neural pathways to speed response. 3) Small P1 onset differences between fast and slow reaction times suggest P1 indicates reaction time before response.