Table 1.

Sample Characterization (means and standard deviations)

Measure	ASD	DD	TD
N	28	16	34
Chronological age [months]	20.7 (3.0)	19.3 (2.6)	19.6 (2.8)
Male : Female	22:6	10:6	22:12
Nonverbal MA (NVMA) [months]¹	18.4 (4.1)^a	18.0 (4.2)^a	21.0 (2.9)^b
Nonverbal Developmental Quotient (NVDQ)¹	89.9 (17.3)^a	93.7 (19.4)^a	107.5 (10.8)^b
Verbal MA (VMA) [months]¹,²	12.1 (5.9)^a	12.5 (4.4)^a	21.0 (4.4)^b
Verbal Developmental Quotient (VDQ)¹,²	59.7 (28.5)^a	64.9 (22.1)^a	106.7 (18.9)^b
Social affect (SA)³	13.3 (4.3)^a	7.9 (3.6)^b	-
Stereotyped & repetitive behaviors (SRB)³	4.1 (2.1)^a	1.6 (1.3)^b	-
ADOS Total³	17.4 (5.6)^a	9.6 (4.1)^b	-

One child in the ASD group was not administered the MSEL

Two children in the TD group were not administered verbal components of the MSEL

Two children in the DD group were not administered the ADOS

Different superscripts indicate significantly different groups, p < .05