Table 2. Participant Information.

Group (n)	Average Age in Months (SD)	Sex		Vineland Adaptive Behavior Scale (Sparrow et al., 1984) Communication Domain Scores
		M	F	Communication Domain Mean Standard Score* (SD)	Expressive Language Subdomain Mean Age-Equivalent in Months (SD)	Receptive Language Subdomain Mean Age-Equivalent in Months (SD)
ASD (30)	28.33 (5.08)	23	7	71.73 (8.27)	13.93 (4.93)	17.20 (5.92)
TDA (11)	27.73 (5.50)	8	3	104.27 (10.18)	27.91 (10.61)	30.18 (8.16)
TDL (23)	12.27 (0.50)	13	10	105.96 (7.51)	11.65 (1.64)	14.26 (2.94)

Note.

^*Mean = 100, SD = 15. ASD = autism spectrum disorder. TDA = typically developing – age matched.

TDL = typically developing – language matched.