Table 2.

Mean (and SE) feedback and response ERN difference wave amplitudes for schizophrenia patients and control subjects.

Task	Condition	Control subjects (n = 23)	Schizophrenia patients (n = 32)
Passive gamblinga	Expected	−2.59 (0.51)	−3.17 (0.31)
	Unexpected	−3.59 (0.66)	−4.02 (0.55)
Time estimation	Neutral	−3.63 (0.45)	−4.53 (0.68)
	Zero	−4.05 (0.55)	−4.98 (0.70)
Flankerb		−11.46 (2.24)	−4.66 (1.28)

Data are from Cz (passive gambling task) and FCz (time estimation and flanker); feedback ERN: passive gambling task and time estimation task; response ERN: flanker task.

^aN = 21 control subjects.

^bN = 15 control subjects and 20 patients.