MEG-PLAN: a clinical and technical protocol for obtaining magnetoencephalography data in minimally verbal or nonverbal children who have autism spectrum disorder

Table 1 Participant demographics—children who have autism spectrum disorder and are minimally verbal or nonverbal

	N	Developmental quotient		Standard score
	N	M (SD)	Range	M (SD)	Range
Nonverbal IQ
Leiter-3	34	46 (17)^a	24–96	57 (15)	32–87
Mullen	3	23 (5)	17–26	--	--
		Raw score		Standard score
		M (SD)	Range	M (SD)	Range
Receptive vocabulary	36	39 (20)	4–90	33 (13)	20–74
Expressive vocabulary	36	26 (23)^b	0–90	56 (7)	54–86
Adaptive Behavior	38	--	--	52 (10)	34–70
Autism Diagnostic Observation Schedule, 2nd Ed (Calibrated Severity Score)	34	7 (1)	4–10
Social Communication Questionnaire (Total Score)	38	26 (5)	14–33

^aN = 33, one participant had data shared from a recent Leiter-3 administration and raw scores were not available, thus developmental quotient could not be derived
^bFor the expressive vocabulary assessment 10 participants were nonverbal with raw score = 0. The floor standard score is < 55; a standard score of 54 was universally included for these cases, but is likely artificially inflating the standard score mean value
Nonverbal IQ Leiter International Performance Scale, 3rd Edition (Leiter-3), Mullen Scales of Early Learning (Mullen); Receptive Vocabulary Peabody Picture Vocabulary Test, 4th Edition (PPVT-4); Expressive Vocabulary Expressive One-Word Picture Vocabulary Test, 4th Edition (EOWPVT-4); Adaptive Behavior Vineland Adaptive Behavior Scales, 3rd Edition, Parent/Caregiver Form Adaptive Behavior Composite (Vineland-3 ABC Composite)
When N < 38, missing data reflects participant fatigue or distress that resulted in an abbreviated research visit

ISSN: 1866-1955