Table 2.

Summary statistics for clinical measures

Domain	Evaluation	Variable	n	Range	Mean	SD	% with atypical score
Intellectual and Adaptive Functioning	Mullen Scales, Stanford-Binet-5, DAS-II1	Full scale DQ	15	9.9–97.8	34.1	22.5	93
		Nonverbal DQ	15	14.1–78.4	34.1	16.8	93
		Verbal DQ	15	5.8–117.3	35.1	28.7	93
	Vineland-32	Communication	15	20–87	43.7	24.7	87
		Daily Living Skills	15	20–73	48.6	17.5	100
		Socialization	15	20–90	55.3	20.6	87
		Adaptive Behavior Composite	15	20–76	49.5	18.8	100
Motor Functioning	ADI-R, Psychiatric Evaluation2	Age of crawling (months)	15	5–24	15.2	6.0	87
		Age of walking independently (months)	13	11–36	26	8.1	93
	Vineland-32	Motor Skills	10	20–77	57.6	18.6	100
		Fine Motor	10	1–10	6.0	3.7	100
		Gross Motor	10	1–12	7.9	4.3	60
	VMI-63	Standard score	13	< 45–87	68.3	10.0	85
	DCDQ4	Total score	8	15–45	23.8	9.7	100
Expressive and Receptive Language	ADI-R, Psychiatric Evaluation2	Age of first word (months)	10	15–60	28.7	14.0	87
		Age of phrased speech (months)	7	36–60	48.6	9.8	100
	Expressive Vocabulary Test2	Standard score	7	44–123	77.6	23.5	57
	Peabody Picture Vocabulary Test2	Standard score	13	20–111	59.7	31.2	69
	Vineland-32	Expressive Language	15	1–14	3.6	4.3	93
		Receptive Language	15	1–14	5.7	4.8	80
	MacArthur-Bates Communicative Development Inventory	Words Understood	13	15–396	277.9	125.8	n/a
		Words Produced	13	0–396	164.8	186.1	n/a
		Early Gestures	13	6–18	12.7	4.9	n/a
		Later Gestures	13	4–45	27.2	15.4	n/a
		Total Gestures	13	10–63	39.9	19.5	n/a
ASD Symptomatology	SRS-25	Total score	15	50–96	68.9	14.0	73
		Social Communication	15	48–94	69.7	16.4	60
		Social Awareness	15	56–90	70.4	10.6	80
		Social Cognition	15	51–84	66.8	10.7	80
		Repetitive Behavior	15	52–90	72.6	13.5	80
		Social Motivation	15	38–86	58.2	14.1	47
	RBS-R	Insistence on Sameness	14	0–9	2.57	2.93	n/a
		Stereotyped Behavior	14	0–6	2.64	2.02	n/a
Sensory Features	SAND2	Sensory seeking	15	7–28	17.27	7.3	87
		Hyporeactivity	15	0–21	10.40	6.7	80
		Hyperreactivity	15	2–11	5.67	3.5	47
		Tactile	15	2–19	13.67	4.5	93
		Auditory	15	0–23	10.6	6.3	73
		Visual	15	0–17	9.07	5.5	73
Behavioral Comorbidities	CBCL6	Internalizing	14	33–69	53.50	9.51	14
		Depressive	14	50–77	58.86	8.42	21
		Anxiety	14	50–76	54.71	7.06	14
		Externalizing	14	44–73	58.43	8.11	21
		ADHD	14	54–72	64.29	6.60	50
		Oppositional/Defiant	14	51–64	54.71	5.30	0
	Aberrant Behavior Checklist5	Hyperactivity	15	< 40–65	53.60	7.50	20
		Irritability	15	< 40–67	50.67	9.79	13
		Lethargy/Social Withdrawal	15	< 40–60	48.11	7.64	7
		Stereotypy	15	40–73	49.53	10.14	20
		Inappropriate Speech	15	40–67	48.93	8.03	7
	Vineland-32	Internalizing Behavior	15	15–22	18.5	2.2	33
		Externalizing Behavior	15	11–21	17.5	2.6	20

DAS-II: Differential Abilities Scales, Second Edition; ADI-R: Autism Diagnostic Interview-Revised; VMI-6: Beery-Buktenica Developmental Test of Visual-Motor Integration, Sixth Edition; DCDQ: Developmental Coordination Disorder Questionnaire; SRS-2: Social Responsiveness Scale, Second Edition; RBS-R: Repetitive Behavior Scales-Revised; SAND: Sensory Assessment for Neurodevelopmental Disorders; CBCL: Achenbach Child Behavior Checklist

¹Atypical if < 77.5

²Atypical if standard score 1.5 SD above or below population mean

³Atypical if standard score < 50, per manual

⁴Atypical if score 15–46 (5 y–7 y 11 m), 15–55 (8 y–9 y 11 m), 15–57 (10 y–15 y)

⁵Atypical if T score > 60

⁶Atypical if T score > 65