Before the start of the scanning session, all subjects completed the following assessments: the SPQ4 as additional measure of schizotypal symptoms; a semi-structured interview adapted from the Early Psychosis Prevention and Intervention Centre (EPPIC) Drug and Alcohol Assessment Schedule (http://www.eppic.org.au) to assess current/past medication use and current/past use of alcohol, tobacco and illicit drugs; the Social Functioning Questionnaire (SFQ)42 to measure social functioning; and a validated short version of the Wechsler Adult Intelligence Scale-III (WAIS-III)43 to measure intelligence.
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