Aspects of cognitive functioning in schizotypy and schizophrenia: Evidence for a continuum model

Ten-year stability of self-reported schizotypal personality features in patients with psychosis and their healthy siblings

“…The SPQ has shown to be an appropriate instrument for the evaluation of SPD features in patients' relatives and general population (Bergman et al, 2000;Cochrane et al, 2012;Mata et al, 2000;Siever and Davis, 2004;Torti et al, 2013). Moreover, the SPQ-B is a brief selfreport scale modeled on DSM-III-R criteria for SPD and its use in patient population is not exceptional (Rossi and Daneluzzo, 2002;Schurhoff et al, 2005;Vollema and Postma, 2002).…”

The independence of schizotypy from affective temperaments – A combined confirmatory factor analysis of SPQ and the short TEMPS-A

“…Accelerated thinking in hypomania/ mania can impair attention and memory, thus impacting on signal detection and the perception flow (Bora et al, 2010). In people with schizotypy, attention and memory impairment might be primary and independent from mood variations (Noguchi et al, 2008, Cochrane et al, 2012Koychev et al, 2012). Neuropsychological testing of these hypotheses is pending.…”

Screening schizotypal personality disorder for detection of clinical high risk of psychosis in Chinese mental health services

“…Twin studies have suggested moderate heritability Torgersen et al, 2000) and a genetic correlation has been found using gene linkage analysis (Ohi et al, 2012). The recent literature also suggests that individuals with SPD have similar impairments to those with schizophrenia in emotional expression (Cohen et al, 2012;Shi et al, 2012), interpersonal patterns (Kendler et al, 1995;Waldeck and Miller, 2000), and cognitive function (Cochrane et al, 2012;Noguchi et al, 2008). In addition, they demonstrate abnormalities with regard to phenomenological and neurobiological characteristics (McClure et al, 2013), but to a lesser degree.…”