In an exploratory scale factor analysis of the Combined Schizotypal Traits Questionnaire, Claridge et al. (1996) reported four schizotypal trait dimensions, which they labelled Aberrant Perceptions and Beliefs, Cognitive Disorganisation with Anxiety, Introvertive Anhedonia, and Asocial Behaviour. The present paper reports the findings of a further examination of both scale and item factor analy...

Previous studies have found evidence for skin conductance (SC) orienting abnormalities in psychosis-prone subjects, but there have been no previous studies on subjects with a diagnosis of schizotypal personality disorder. This study assesses whether clinical schizotypal subjects show abnormal habituation to orienting stimuli. Thirteen subjects with both high scores on the Schizotypal Personalit...

This study investigated behavioral inhibition in female college students with psychometrically defined schizotypal traits using a Go/NoGo task and eventrelated potentials (ERPs). The schizotypal-trait (n = 15) and normal control (n = 15) groups were selected based on scores of the Schizotypal Personality Questionnaire (SPQ). The Go/NoGo task consisted of Go (requires response) and NoGo (require...

OBJECTIVE The aim of this study was to investigate the relationship between emotional traits and schizotypal symptoms and to establish a hypothetical model for the causal relationship between them. METHODS Schizotypal symptoms were assessed using the Schizotypal Personality Questionnaire (SPQ), and a total of seven emotional traits considered to be potential risk factors for schizotypy were c...

To explore whether schizotypal traits may undermine source monitoring for actions, 67 undergraduate participants (21 men) completed the Schizotypal Personality Scale and were then given a source-monitoring task in which some specific acts had to be performed, whereas others only had to be imagined. Next, participants had to complete an old-new recognition task and ascribe the source, i.e., whet...

OBJECTIVE Patients affected by schizophrenia show deficits in both visual perception and working memory. The authors tested early-stage vision and working memory in subjects with schizotypal personality disorder, which has been biologically associated with schizophrenia. METHOD Eleven subjects who met DSM-III-R criteria for schizotypal personality disorder and 12 normal comparison subjects we...

Schizotypal personality disorder, a diagnosis defined partially in terms of a genetic relatedness to schizophrenia, has begun to receive extensive investigative study. While the exact etiologic relationship between schizotypal personality disorder and schizophrenia remains to be determined, three models have been considered: (1) the two may be distinct disorders, (2) they may be essentially ide...

This article presents a new interview-based research instrument for assessing schizotypal symptoms and signs. The Structured Interview for Schizotypy (SIS), which was developed from experience gained in a large, controlled family study of schizophrenia in the west of Ireland and has been field-tested in three other locations, differs from previously available interviews in that it includes: (1)...