The current sample included three CHR patients who developed threshold psychosis as determined during the prospective follow-up by the “Presence of Psychosis” criteria in the SIPS/SOPS (cf. Miller et al., 1999, 2003). These ‘converters’ (1 male, 2 female) were aged 16, 23 and 27 years and had 10, 14 and 17 years of education, respectively. Their SIPS/SOPS scores (M ± SD, positive, 9.3 ± 5.0; negative, 19.0 ± 6.9; disorganization, 9.3 ± 4.0; general, 12.0 ± 1.7; global assessment of function, 40.3 ± 2.1) were largely comparable to the overall patient sample (Tab. 1), although converters tended to show more negative symptoms. Because findings for these CHR individuals are of particular importance for determining whether electrophysiologic measures during auditory target detection have predictive value for transition to psychosis, descriptive summaries of their data are also separately reported when appropriate below.
