Table 5.

MMN Amplitudes

Site	FHS	HC	t Test	Effect Size (d)
Pitch
F1	−1.8 (2.2)	−1.6 (1.7)	t 67 = 0.53, P = .60	−0.10
Fz	−1.9 (2.2)	−1.7 (1.7)	t 67 = 0.42, P = .68	−0.10
F2	−1.8 (2.2)	−1.7 (1.7)	t 67 = 0.37, P = .71	−0.05
FC1	−2.0 (2.4)	−1.7 (1.8)	t 67 = 0.57, P = .57	−0.14
FC2	−1.9 (2.3)	−1.7 (1.9)	t 67 = 0.38, P = .71	−0.09
C1	−1.8 (2.3)	−1.5 (1.7)	t 67 = 0.74, P = .46	−0.15
Cz	−1.9 (2.3)	−1.7 (1.8)	t 67 = 0.42, P = .67	−0.10
C2	−1.9 (2.3)	−1.7 (1.9)	t 67 = 0.40, P = .69	−0.09
M1	0.8 (1.3)	1.2 (1.2)	t 67 = 1.34, P = .19	0.32
M2	0.8 (1.6)	1.2 (1.2)	t 67 = 1.19, P = .24	0.28
Duration
F1	−2.1 (1.9)	−2.3 (1.7)	t 67 = 0.54, P = .59	0.11
Fz	−2.2 (1.9)	−2.4 (1.7)	t 67 = 0.46, P = .65	0.11
F2	−2.3 (1.9)	−2.4 (1.7)	t 67 = 0.33, P = .75	0.06
FC1	−2.3 (1.9)	−2.6 (1.9)	t 67 = 0.64, P = .52	0.16
FC2	−2.3 (2.0)	−2.6 (1.8)	t 67 = 0.64, P = .53	0.16
C1	−2.0 (2.0)	−2.3 (1.9)	t 67 = 0.62, P = .54	0.15
Cz	−2.1 (2.0)	−2.6 (1.9)	t 67 = 0.88, P = .38	0.26
C2	−2.2 (2.0)	−2.6 (1.9)	t 67 = 0.83, P = .41	0.21
M1	1.2 (1.0)	1.1 (1.5)	t 67 = 0.32, P = .75	−0.08
M2	1.3 (1.2)	1.2 (1.8)	t 67 = 0.20, P = .84	−0.07

Note: Values are mean μV (SD). FHS, first hospitalized schizophrenia; HC, healthy control; MMN, mismatch negativity.