data of 3 patients and 1 control had to be excluded due to technical issues during the olfactory EEG recordings. Demographic and clinical characteristics of the final sample are summarized in Table 1. Participants, who had no history of neurological illness or substance abuse, were between 13 and 27 years of age (median 22 years), had between 9 and 19 years of education (median 14 years), and were primarily right-handed (mean laterality quotient 71.9 ± 7.4; Oldfield, 1971); there were no significant differences between patients and controls in these demographic variables. Likewise, the small number of smokers did not differ between patients (n = 3) and controls (n = 2), χ2(1) = 0.18, n.s. = .41. Participants were instructed to refrain from smoking or applying any cosmetic fragrance on the day of testing. Olfactory ERP (OERP) recording sessions, which lasted about 1.5 h, were scheduled between 2 and 6 pm to control for putative circadian influences on chemosensory ERP amplitudes (Nordin et al., 2003). Time of testing did not differ between groups, F(1, 37) < 1.0, n.s. Following the OERP recordings, participants also performed a novelty oddball ERP paradigm (Bruder et al., 2009; Tenke et al., 2010), and these results
