Figures 1 and 2 show the grand mean, reference-free CSD waveforms of patients and controls at all 31 recording sites for tonal and phonetic targets (pooled across response mode) and nontargets (pooled across task and response mode), and for targets for each response mode (pooled across task). The original, nose-referenced ERP waveforms were highly comparable to those of our prior studies10,33,48 (corresponding ERP figures and animated topographies of ERP and CSD waveforms can be obtained at URL http://psychophysiology.cpmc.columbia.edu/SczOddball2010.html).
