Is the dolphin a fish? ERP evidence for the impact of typicality during early visual processing in ultra-rapid semantic categorization in autism spectrum disorder

Table 1 IQ and demographic information of both groups of male participants, indicated separately for cognitively able autistic and neurotypical (NT) adults

	Autistic adults	NT adults	t-value	p-value
IQ (mean Raven raw scores)	50.5 (SD = 7.7)	53.5 (SD = 6.0)	− 0.824	.418
Age (mean in years)	32.5 (SD = 8.4)	27.5 (SD = 5.4)	1.903	.070
Schooling (mean in years)	14.0 (SD = 2.8)	15.8 (SD = 2.6)	− 1.834	.078
ASDS (mean raw scores)	103.7 (SD = 9.3)

IQ was measured using Raven’s standard progressive matrices; the average raw scores in a Portuguese NT sample were 41.18 (SD = 12.03; [54]). The Asperger’s Syndrome Diagnostic Scale (ASDS; [45]) was used to confirm clinical diagnosis; the standard score (M = 100, SD = 15) indicates the probability of autism (Campbell, 2005). T-value of pairwise t-test for independent groups. IQ Intelligence quotient, SD Standard deviation

ISSN: 1866-1955