. Author manuscript; available in PMC: 2019 Jun 1.

Published in final edited form as: J Autism Dev Disord. 2018 Jun;48(6):1982–1994. doi: 10.1007/s10803-017-3439-z

Table 4.

Differences in standardized assessment performance as a function of ASD clinical diagnostic status and ADOS-2 module.^a

Assessment	Module 1 (3 ASD, 6 NS)	Module 2 (1 ASD, 20 NS)	Module 3 (8 ASD, 25 NS)
DAS-II GCA (“IQ”)	z = −2.20, p = .028^*	⁺	z = −0.74, p = .462
DAS-II Verbal SS	z = −2.36, p = .018^*	⁺	z = −0.04, p = .966
DAS-II Nonverbal Reasoning SS	z = −1.55, p = .167		z = −1.07, p = .283
DAS-II Spatial SS	z = −0.78, p = .435	⁺	z = −1.18, p = .239
PPVT-4 SS	z = −2.07, p = .038^*		z = −0.57, p = .570
EVT-2 SS	z = −1.06, p = .291		z = −0.46, p = .643
SIB-R Broad Independence SS	z = −1.23, p = .195	⁺	z = −1.70, p = .089
SIB-R Motor Skills SS	z = −0.26, p = .795	⁺	z = −1.45, p = .147
SIB-R Social Int. & Comm. SS	z = −2.07, p = .039^*	⁺	z = −1.64, p = .101
SIB-R Personal Living SS	z = −2.07, p = .039^*	⁺	z = −2.21, p = .027^*
SIB-R Community Living SS	z = −1.29, p = .197	⁺	z = −1.51, p = .130

Note: ASD = Autism spectrum disorder, NS = Non-spectrum, DAS-II = Differential Ability Scales-II, GCA = General Conceptual Ability, SS = standard score, PPVT-4 = Peabody Picture Vocabulary Test-4, EVT-2 = Expressive Vocabulary Test-2, SIB-R = Scales of Independent Behavior-Revised, Int. = Interaction, Comm. = Communication.

Negative z-values indicate that the distribution of SSs was higher for the NS group than for the ASD group.

p < .05.

⁺

Child with ASD earned the lowest or next lowest SS.