Table 3.

Regression Models Predicting Individual Differences in First-Grade Word-Problem Skill

Model	R2	SEE	R2 Change	F Change	p-value	B	SE	Beta	t	p-value
1: Numerosity	.444	2.28	.444	(2,202) 80.66	< .001
Constant						5.47	0.54		10.20	< .001
Number Line Estimation						−0.76	0.23	−.20	− 3.37	.001
Number Sets Test						1.39	0.15	.55	9.49	< .001
2. Numerosity + Domain-General	.552	2.09	.108	(8,194) 5.82	< .001
Constant						−1.04	1.78		− 0.58	.560
Language						0.37	0.20	.12	1.83	.069
Attentive Behavior						0.02	0.02	.08	1.26	.209
Central Executive						0.04	0.01	.23	3.30	.001
Phonological Loop						−0.01	0.01	−.03	− 0.56	.578
Visuospatial Sketchpad						−0.00	0.01	−.01	− 0.09	.929
Concept Formation						0.03	0.01	.14	2.24	.026
Nonverbal Reasoning						0.01	0.02	.02	0.34	.736
Processing Speed						−0.01	0.01	−.04	− 0.73	.467
Number Line Estimation						−0.04	0.02	−.10	− 1.66	.100
Number Sets Test						0.80	0.17	.32	4.63	< .001