Table 3.

Cross validated classification results for the discriminant function analyses on frontal EEG asymmetry for each age group.

Whole Sample
Wide Frequency Band Model (3–12Hz)					Narrow Frequency Band Model (3–9Hz)
F (1, 346), 36.13**					F (1, 346), 36.87**
λ = .905; χ2 (1) =34.31**					λ = .904; χ2 (1) =34.98**
	Hits	IC	Z			Hits	IC	Z
D	55.03%	22.54%	3.18			55.70%	22.54%	3.18
ND	71.36%	34.28%	4.18			70.85%	31.93%	3.90
1-Week
Wide Frequency Band Model 3–12Hz					Wide Frequency Band Model 3–9Hz
λ = .933; χ2 (1) =6.76, p =.009					λ = .931; χ2 (1) =6.99, p =.008
	Hits	IC	Z			Hits	IC	Z
D	64.44%	35.35%	2.62		D	64.44%	35.35%	2.62
ND	69.09%	31.31%	2.10		ND	69.09%	31.31%	2.10
1-Month
Wide Frequency Band Model 3–12Hz					Narrow Frequency Band Model 3–9Hz
λ = .859; χ2 (1) =21.54, p <.001					λ = .854; χ2 (1) = 22.31, p <.001
	Hits	IC	Z			Hits	IC	Z
D	62.12%	30.07%	2.66		D	63.64%	32.87%	2.90
ND	71.79%	38.46%	3.12		ND	71.79%	38.46%	3.12
3-Months
Wide Frequency Band Model 3–12Hz					Narrow Frequency Band Model 4–9Hz
λ = .936; χ2 (1) =6.69, p =.010					λ = .913; χ2 (1) =9.29, p =.002
	Hits	IC	Z			Hits	IC	Z
D	36.84%	0.48%	0.04		D	42.11%	8.77%	0.71
ND	78.79%	41.95%	2.59		ND	80.30%	46.09%	2.84

D = Infants of depressed mothers; ND= Infants of non-depressed mothers

Hits = Percent correctly classified; IC = Percent improvement over chance