Aspectos psicofisiológicos en atención selectiva

Abstract

The visual models of focused attention, trying to explain how the attentional resources are assigned to the different stimuli, have usually ignored the psychophysiological factors. The main aim of the present study is to show how different physiological factors can explain in part sorne experimental results obtained in this type of studies. In order to show the influence of the physiological factors in attentional processing, we have used in this work a visual focused attention task based on the response competition paradigm of Eriksen (Eriksen B.A. and Eriksen C.W., 1974), wich is the paradigm that has often be.en used to know the spatial limits of interference of the irrelevant stirnuli. In spite of the existence of proposals in which these limits have been related to the subjective processing, or alternatively to features of stimuli, we show in this work that sorne of the results obtained by the response competition paradigm may be related to psychophysiological factors like the retina! architecture and the sensibility to the contrast.