Figure 2.

Event-related potentials elicited by deviants and standards which were defined by irregular and regular target-to-object assignments, respectively, and the corresponding deviant minus standard difference waves. ERPs and difference waves are displayed separately for the two target-to-object assignments (left column, discs belonging to the same object; right column, discs belonging to different objects). We found differences in the processing of standards and deviants at a posterior-temporal region of interest (ROI, lower row) whereas no such differences occurred at frontal electrode positions (frontal ROI, upper row). Gray shaded boxes indicate the time windows used to determine mean amplitudes which were subjected to statistical analysis. The peaks of prominent ERP components are indicated by gray arrows.