Electrophysiological evidence for cognitive control during conflict processing in visual spatial attention

摘要: Event-related potentials were measured to investigate the role of visual spatial attention mechanisms in conflict processing. We suggested that a more difficult target selection leads stronger attentional top-down control, thereby reducing effects arising conflicts. This hypothesis was tested by varying difficulty location negative priming (NP) paradigm. The task resulted prolonged responses as compared easy task. A behavioral NP effect only evident Psychophysiologically associated with reduced parietal N1, enhanced frontocentral N2 and N2pc components P3 latency for control condition. also obvious Additionally amplitudes increased latencies delayed differences at electrodes are consistent previous studies ascribing activity prefrontal cortex source control. Thus, we propose cognitive is involved task, resulting conflict.