Fig 2. Grand averaged event-related potential waveforms elicited by auditory click-conditioning stimuli for healthy controls (blue line) and schizophrenia patients (green line) pooled across electrodes Fz and Cz.

Onset of stimuli is at 0 ms (first click, solid line) and at 500 ms (second click, dashed line). Click-conditioning stimuli evoke a P50 component (A) and a N100/P200 component complex (B). Topographic maps are given for the maximum amplitude of the P50, N100 and P200 amplitude elicited by the first click stimuli for both groups.