Table 2.

Mean and standard deviation (SD) for the mismatch negativity and P3a amplitudes for each group

	Healthy controls (n = 27)	Bipolar disorder (n = 52)	Schizophrenia (n = 30)
Mismatch negativity
Fz	−2.12 (1.22)	−1.35 (0.87)	−0.94 (0.78)
Midline electrode cluster	−1.82 (0.99)	−1.18 (0.76)	−0.85 (0.67)
Left electrode cluster	−1.65 (0.84)	−0.98 (0.76)	−0.65 (0.62)
Right electrode cluster	−1.83 (1.11)	−1.13 (0.79)	−0.88 (0.71)
P3a
Fz	1.25 (1.05)	0.39 (0.91)	0.75 (0.89)
Midline electrode cluster	1.00 (0.83)	0.38 (0.79)	0.61 (0.70)
Left electrode cluster	0.87 (0.65)	0.36 (0.74)	0.59 (0.75)
Right electrode cluster	0.95 (0.77)	0.38 (0.77)	0.66 (0.74)