Mounting evidence suggests that social anhedonia may be a marker of genetic liability for schizophrenia-spectrum pathology. To examine this hypothesis, we conducted a study of severity of schizotypal, schizoid and paranoid pathology (i.e., Cluster A personality disorders) in the biological parents of individuals with high levels of social anhedonia and healthy controls. Eighty-six individuals w...

INTRODUCTION This exploratory study combined a preliminary evaluation of the French version of Hyler's [Hyler S.E. Personality Questionnaire (PDQ-4 plus). New York: New York State Psychiatric Institute; 1994] Personality Diagnostics Questionnaire (PDQ-4 plus) with an investigation into whether Eysenck's personality dimensions allow us to differentiate between subjects diagnosed by the PDQ-4 plu...

D SM-III restricts the diagnosis of schizophrenia to those patients demonstrating overt evidence of a thought disorder or hallucination. The study describes seven patients on an inpatient alcohol treatment unit who met the criteria for schizotypal personality. Their age, mental status exam, family history, and response to medication were compatible with a schizophrenic spectrum concept of the s...

Symptoms of psychosis have been proposed to form part of a continuous distribution of experiences in the general population rather than being an all-or-nothing phenomenon. Indeed, schizotypal signs have been reported in subjects from non-clinical samples. Emotional processing has been documented to be deficient in schizophrenia. In the present study, we tested the hypothesis whether putatively ...

The study examines the relationship between Asperger’s Disorder (AD) and Abstract: Schizotypal Personality Disorder (SPD), mutually exclusive but similar diagnoses [DSM-IV-TR; American Psychiatric Association (2000).Diagnostic and statistical manual of mental disorders. Washington, DC: Author]. The literature and comparison of diagnostic criteria suggest that the two disorders may overlap: AD s...

Much debate in schizotypal research has centred on the factor structure of the Schizotypal Personality Questionnaire (SPQ), with research variously showing higher-order dimensionality consisting of two to seven dimensions. In addition, cross-cultural support for the stability of those factors remains limited. Here, we examined the factor structure of the SPQ among British and Trinidadian adults...