. Author manuscript; available in PMC: 2012 Jun 1.

Published in final edited form as: Autism Res. 2011 Feb 9;4(3):177–188. doi: 10.1002/aur.183

Table 3. Mean Number of Vocalizations Analyzed by each Participant Group.

	ASD (n = 30)	TDA (n = 11)	TDL (n = 23)
Mean Total Vocalizations (SD)	51.13 (22.94)	51.00 (8.32)	41.70 (18.48)
Mean Speech-like Vocalizations (SD)	37.33 (15.22)	47.45 (8.44)	33.87 (16.11)
Mean number of word approximations produced (SD)	17.27 (14.90)	36.55 (9.75)	-
Mean number of babbled vocalizations produced (SD)	32.77 (14.82)	13.45 (9.75)	33.87 (16.11)
Mean Non-Speech Vocalizations (SD)	13.80 (14.81)	3.55 (3.42)	7.83 (6.69)

Note. Dash denotes variable not computed. ASD = autism spectrum disorder. TDA = typically developing – age matched. TDL = typically developing – language matched.