Study on the selection mechanism of attention by steady-state visually evoked potential
用稳态视觉诱发电位研究注意的选择机制

It is well known that attention can modulate the processing of cognitive task,and can be seen as a choice of the external stimulus.There exist two theories about the mechanism of the attention choice:early choice or late choice.The steady-state visually evoked potential is a direct influence by the flicker,and is generated in the early phase of a task.If it can be modulated by attention,it can prove that the mechanism of the attention choice is early choice.In this paper,two different frequency flickers were used as the stimulus of steady-state visually evoked potential,and it was found that under two situations(attending the flicker and un-attending the flicker),attention could modulate the amplitude of steady-state visually evoked potential,and for different frequency flicker,this modulation was different too.