Psyehophysiological Studies of Unattended Information Proeessing

Re arride describes dic general metbods and sorne of the resutts obrained lix dic Psychophysiology Laboratory of the tJniversliy of La Coruña. The paper covers our research on the Simon effect and accessory effect, although it is nor a review of dic literature. Ihe research strategy we followed is huiit around the ose of laterajized motor potentials recorded from scalp. These measures allow observing the way responses are selecred anó w}len they are selecred. providing an invaluable Loo~ to study response interference and ro split reaction time jato two halves. The research on the Simon effect conclodes [barinterference during response selection is critical in the Simon effect bur it ~sdubious xvhether Ibis process should be considered al automatie anó stimulus-drive,t as is wideiy accepted. Ihe experiments with rhe accessory effect indicate Ihar facilitation is produced before response selection is oven which ends a long controversy about dic locos of dic accessory effect. Kc’ytcords: Sinmon cJCcr, accessory effect, ERJ~ LRP