Table 4.

Residualized mathematics hierarchical regression model.

Variables	Estimate	SE	R	R 2	ΔR2
Step 1:			0.053	0.003
Length of Stay	−0.099 ***	0.012
Step 2: Child & Adoption Factors			0.267	0.071	0.069
Sex (male > female)	−0.221 *	0.093
L1 (English > other)	0.049	0.065
Siblings	0.011	0.028
Adoption Type (Foster > International)	−0.398	0.437
Adoption Type (Private > International)	−0.202	0.438
Country of Adoption (US > Other)	0.252	0.435
Placement Pre-adoption
Birth Parents > Foster Family	−0.016	0.050
Kinship Foster Family > Foster Family	−0.058	0.075
Group Home > Foster Family	−0.014	0.064
Institution/Orphanage > Foster Family	−0.057	0.060
Hospital/Health Clinic > Foster Family	−0.053	0.052
Other > Foster Family	−0.007	0.067
SES	−0.113†	0.062
SES × Sex	00.282 **	0.102
L1 × Sex	0.170†	0.097
L1 × SES	0.117†	0.064
L1 × SES × Sex	−0.230 *	0.106

Notes. SES = socioeconomic status. L1 = first language;

^†p < .1,

^*p < .05,

^**p < .01,

^***p < .001