Table 2.

Number of trials in event-related potential averages.

Stimulus type	HC		ESZ
	M	SD	M	SD
Frequency-deviant	256.6	22.4	252.9	37.2
Frequency + duration double-deviant	260.2	17.5	251.4	37.2
Duration-deviant	262.7	18.1	250.2	37.7
Intensity-deviant	263.1	19.4	253.2	42.4
Standard	1085.8	84	1066.6	163

Note. HC = healthy controls, ESZ = early illness schizophrenia patients, M = mean, SD = standard deviation.