Figure 2

The activation changes from latency and amplitude differences at all the scalp channels were summarized between auditory and visual event-related potentials in control and schizophrenic groups. This difference remained significant (p < 0.01) for 43 schizophrenic patients and 40 control subjects after the subject-mean ERP was subtracted from each trial. The average ERP of the auditory and visual stimulus and the peaks conventionally termed N100, N200, P200 and P300. The scalp map indicates that it was obvious that the visual ERP is more specific to identify schizophrenic patients than the auditory ERP over the Fz, Cz and Pz regions.