“…To date, clinical diagnosis of ASD is based on behavioral symptoms that include restricted and repetitive patterns of conduct, interests, or activities, and difficulties in (verbal and/or nonverbal) communication/interactions (American Psychiatric Association, 2013; hereafter, DSM 5). Recent changes in diagnostic criteria (Halfon & Kuo, 2013;Maenner et al, 2014) have had a significant impact on both clinical and research practice, encouraging the study of quantitative markers (sometimes defined also as Bbiomarkers^) that may help support standard behavioral diagnosis. In this context, the term Bquantitative^indicates the combination of behavioral/psychophysical (Foss-Feig et al, 2010;Ronconi et al, 2013), neurophysiological (Cattaneo et al, 2007;Vlamings, Jonkman, van Daalen, van der Gaag, & Kemner, 2010), and neuroimaging (Haar, Berman, Behrmann, & Dinstein, 2014;Lynch et al, 2013) markers that-in the last decade-have considerably improved our knowledge on the pathophysiology of ASD (for reviews from different perspectives, see Ecker, Bookheimer, & Murphy, 2015;Kujala, Lepistö, & NÀÀtĂ€nen, 2013;Sacrey, Armstrong, Bryson, & Zwaigenbaum, 2014;Simmons et al, 2009).…”