than left frontocentral sites,31–33 which is opposite the left-lateralized P3 seen in healthy adults by Salisbury et al.27 for the silent-counting task. Tenke et al.34 found evidence that the right-lateralized P3 in the button-pressing task was related to two different processes. First, it is due in part to response-related asymmetries associated with right-hand button presses. Second, it is related to the process of pitch discrimination, presumably reflecting the superiority of right hemisphere regions for pitch perception. The presence of a right-lateralized P3 to standard and novel stimuli for which no motor response is given also indicates that this P3 asymmetry is not due solely to overlapping MRPs.31,32 Its relation to right hemispheric dominance for processing tonal stimuli is supported by its association with left ear (right hemisphere) advantage for dichotic pitch discrimination.34
