Table 9.

Hierarchical regression parameters for 16- and 22-month models, Study 2 (N=60)

Final Model	Model 1				Model 2
Measure	R 2	SE	β	p	R 2	SE	β	p
	.12			.004	.30			<.001
MCDI comprehension 16 months		.13	.37	.004
CCT comprehension 23 months						.11	.56	<.001

Excluded Variables	Model 1				Model 2
Measure	B a	t	p		B	t	p
Maternal Education	.03	.23	.816		−.001	−.01	.992
Sex	.02	.16	.871		−.09	−.79	.431
CCT comprehension 16 months	.19	1.54	.129
MCDI production 16 months	−.07	−.50	.623
MCDI production 23 months					.19	1.74	.087

^aUnstandardized B values are reported