Table 6.

Summary of hierarchical regression analysis for variables predicting expressive vocabulary size (N = 35).

	Model 1			Model 2			Model 3
Variable	B	SE B	ß	B	SE B	ß	B	SE B	ß
RelProf	0.047	0.008	0.723∗∗∗	0.040	0.008	0.617∗∗∗	0.123	0.043	1.905∗∗
LexM				0.257	0.081	0.347∗∗	0.296	0.078	0.399∗∗
MorphM				0.216	0.219	0.126	0.304	0.207	0.177
RelProf × LexM							−0.069	0.030	−855∗
RelProf × MorphM							−0.047	0.052	−0.507
R2		0.522			0.644			0.704
F		36.081∗∗∗				18.717∗∗∗		13.823∗∗∗

RelProf, Relative proficiency; LexM, Lexical metalinguistic awareness; MorphM, Morphological metalinguistic awareness.^∗p < 0.05, ^∗∗p < 0.01, ^∗∗∗p < 0.001.