Fig. 1.
a ERP waveforms to standard 4th and 6th stimuli and to missing 4th and 6th stimuli in healthy controls. The arrow indicates the MMN elicited by missing stimuli. Note that missing stimuli, by definition, do not evoke sensory activity. b ERP waveforms to standard 4th and 6th stimuli and to missing 4th and 6th stimuli in schizophrenia. The arrow indicates where the MMN elicited by missing stimuli was expected. Note that the waveforms to missing stimuli show very little negativity in schizophrenia
