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. Author manuscript; available in PMC: 2006 Jan 25.

Published in final edited form as: Child Dev. 2005;76(4):856–868. doi: 10.1111/j.1467-8624.2005.00882.x

Table 2.

Mean Scores (and Standard Deviations) on the Scales of the CDI–WS at Age 2 Years and the CDI–III at Age 3 Years

		CDI–WS			CDI–III
Group	Subgroup	Vocabulary production	Three Longest Sentences	Sentence Complexity	Vocabulary	Sentence	Using Language
Note. CDI–WS = MacArthur–Bates Communicative Development Inventories–Words and Sentences; CDI–III = CDI designed for children ages 30 to 42 months of age.
Total (N = 80–113)^a		260.6 (173.3)	3.2 (1.7)	8.3 (7.0)	59.3 (26.1)	6.5 (3.7)	7.3 (2.6)
Sex	Boys (n = 40–65)^a	216.5 (165.6)	2.7 (1.6)	6.9 (5.6)	52.4 (27.0)	5.5 (3.9)	6.7 (2.6)
	Girls (n = 40–48)^a	320.2 (167.2)^**	3.8 (1.7)^***	9.6 (8.0)	68.6 (21.9)^***	8.0 (3.0)^***	8.1 (2.3)^**
Maternal education	<High school (n = 7–14)^a	55.1 (111.2)	2.1 (1.1)	7.9 (8.1)	44.6 (23.0)	3.7 (3.3)	5.4 (2.7)
	High school (n = 61–86)^a	279.8 (179.3)	3.3 (1.8)	8.8 (7.0)	60.6 (27.0)	6.8 (3.7)	7.6 (2.5)
	College graduate (n = 12–13)^a	257.0 (158.4)^*	3.4 (1.4)^*	5.8 (6.5)	66.0 (18.5)	7.7 (2.9)^**	7.4 (2.0)^*

^a

Variable number of respondents for different scales.

^*

p<.05.

^**

p<.01.

^***

p<.001.