Event-related potentials in the study of sensory discrimination and motor response in simple and choice reaction tasks

The central organization of the so-called stages of information processing and, in particular, whether such processes proceed serially or in parallel is controversial. Many investigators have considered such organization is s ubstantially serial, although new evidence implies the existence of paralle l overlapping processes in which the boundaries between the different stage s of information processing are quite blurred. Such evidence derives in par t from computer-assisted analysis of the brain's electrical activity.