Table 1 summarizes the demographic and clinical characteristics of CHR patients and healthy controls. The two groups did not differ in age (median 21.5 years), education (median 14 years), degree of right-handedness (median laterality quotient 87.5; Oldfield, 1971), or gender composition. All participants had no history of neurological illness or substance abuse and were ascertained with the Structured Interview for Prodromal Syndromes and Scale of Prodromal Symptoms (SIPS/SOPS; Miller et al., 2003). The inclusion/exclusion criteria were highly comparable to those described by Piskulic et al. (2012), including: 1) meeting criteria for at least one of three prodromal syndromes using the SIPS/SOPS; 2) no current or lifetime Axis I psychotic disorder; 3) intelligence quotient (Wechsler scales for children or adults) greater than 70; and 4) no current or past CNS disorder (medical or psychiatric) which may account for prodromal symptoms. As expected, CHR patients showed robust differences to healthy controls in all SOPS subscales (cf. Table 1), but there were no group × gender interactions or gender main effects.
