EFFECTS OF REFERENCE ELECTRODE ON EVENT-RELATED POTENTIALS OF VISUAL SPATIAL SELECTIVE ATTENTION

The effects of average potential or a point at infinity used as references on the event-related potentials (ERPs) of spatial selective attention to the right and left visual fields were investigated. The result with the reference of a point at infinity was derived from a newly proposed reference electrode standardization technique (REST) based on the equivalent distributed source theory. The results of the two sorts of references both indicated that P1 and N1 relatively enhanced in selective attention, but there still had a little difference, in the case of a point at infinity reference, the enhancement of P1 was more obvious and P2 appeared in both attended and unattended cases.