Table 4.

Children’s Sentence Diversity Growth with Treatment Condition and Parent Lexical NP Types

	Unconditional Growth Models		Conditional Group Effects		Conditional Individual Effects

	Model 1a	Model 1b	Model 2a Vocabulary	Model 2b Condition	Model 3a Vocabulary	Model 3b NP types

Fixed Effects
Intercept, β₀₀	6.89^***	5.81^***	5.82^***	6.12^***	4.80^***	4.78^***
CNDW21			0.10†	0.10^*
Condition				−0.63
Toy Talk:NP types						0.07
Linear growth, β₁₀	1.30^***	1.59^***	1.59^***	1.39^***	0.98^***	0.97^***
CNDW21	.		0.03^*	0.02†
Condition				0.41
Toy Talk:NP types						0.05^*
Quadratic growth, β₂₀		0.11^***	0.11^***	0.06	0.13^***	0.13^***
CNDW21			0.003	0.002
Condition				0.11†
Toy Talk:NP types						0.006^*
CNDW					0.08^***	0.08^***
Toy Talk:NP types						−0.001
Random Effects
Intercept, VAR(r₀)	15.71^***	14.63^***	12.97^***	12.94^***	12.62^***	12.35^***
Linear growth, VAR(r₁)	0.54^***	1.16^***	1.02^***	0.98^***	1.03^***	0.83^***
Quadratic growth, VAR(r₂)		0.02^***	0.02^***	0.02^***	0.02^***	0.02^***
CNDW					0.002^***	0.002^***
Level-1, VAR(e)	8.72	3.96	3.93	3.87	2.50	2.43

Note. CNDW = child number of different words; CNDW21 = child number of different words at 21 months; NP = Noun Phrase; Models age-centered at 27 months.

^***

p < .001.

p < .05,

^†

p < .10