TABLE 3.

Unstandardized beta coefficients and standard errors for a taxonomy of linear models to predict mean RJA in 173 infants

	Outcome: Infant Mean RJA
	Model A	Model B	Model C	Model D	Model E
Infant Age	0.16*** (0.03)	0.16*** (0.03)	0.16*** (0.03)	0.17*** (0.03)	0.16*** (0.02)
Infant Receptive Language	0.007* (0.003)	0.008** (0.003)	0.007* (0.003)	0.008* (0.003)	0.008* (0.003)
FPL		0.0006** (0.0002)		0.0005 (0.0003)	0.0005 (0.0003)
Parent Education: some college			0.32+ (0.16)	0.29 (0.20)	0.28 (0.16)
Parent Education: 2-yr degree			0.34+ (0.20)	0.14 (0.20)	0.27 (0.20)
Parent Education: 4-year degree or graduate school			0.40* (0.16)	0.26 (0.16)	0.14 (0.20)
Parent depressive and anxiety symptoms					−0.05 (0.03)
Constant	0.60+ (0.31)	0.46 (0.31)	0.36 (0.32)	0.31 (0.32)	0.34 (0.30)
R 2	0.29	0.32	0.33	0.35	0.36
Δ R 2		0.03	0.04	0.06	0.07
χ2		3.95*	1.47	1.29	1.41

Note:: Parent education was included in the models as a factor with high school as the reference group. FPL was included as a continuous variable. Log likelihood test (χ²) compares each model to Model A.

⁺p < .10,

^*p < .05,

^**p < .01,

^***p < .001.