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Evidence that psychotic symptoms are prevalent in disorders of anxiety and depression, impacting on illness onset, risk, and severity--implications for diagnosis and ultra-high risk research.
BACKGROUND It is commonly assumed that there are clear lines of demarcation between anxiety and depressive disorders on the one hand and psychosis on the other. Recent evidence, however, suggestsExpand
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The structure of the extended psychosis phenotype in early adolescence--a cross-sample replication.
The extended psychosis phenotype, or the expression of nonclinical positive psychotic experiences, is already prevalent in adolescence and has a dose-response risk relationship with later psychoticExpand
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Evidence for a persistent, environment-dependent and deteriorating subtype of subclinical psychotic experiences: a 6-year longitudinal general population study.
BACKGROUND Research suggests that subclinical psychotic experiences during adolescence represent the behavioral expression of liability for psychosis. Little is known, however, about the longitudinalExpand
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A twin study of genetic and environmental determinants of abnormal persistence of psychotic experiences in young adulthood
Evidence suggests that subclinical psychotic experiences are more likely to cause transition to psychotic disorder if their expression becomes persistent. The study of longitudinal patterns ofExpand
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Follow-up factor structure of schizotypy and its clinical associations in a help-seeking sample meeting ultra-high risk for psychosis criteria at baseline.
BACKGROUND Schizotypy is a multidimensional construct indexing psychometric risk for schizophrenia. This study investigated the factor structure and clinical associations of the Oxford-LiverpoolExpand
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Psychotic experiences in a mental health clinic sample: implications for suicidality, multimorbidity and functioning.
BACKGROUND Recent community-based research has suggested that psychotic experiences act as markers of severity of psychopathology. There has, however, been a lack of clinic-based research. We wishedExpand
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A Network Approach to Psychosis: Pathways Between Childhood Trauma and Psychotic Symptoms
Childhood trauma (CT) has been identified as a potential risk factor for the onset of psychotic disorders. However, to date, there is limited consensus with respect to which symptoms may ensue afterExpand
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The relationship between coping and subclinical psychotic experiences in adolescents from the general population--a longitudinal study.
BACKGROUND Subclinical psychotic experiences during adolescence may represent liability for developing psychotic disorder. Both coping style and the degree of persistence of psychotic experiences mayExpand
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Cannabis use and subclinical positive psychotic experiences in early adolescence: findings from a Dutch survey.
AIMS To investigate the association between early cannabis use and subclinical psychotic experiences, distinguishing between five levels of use: never used, discontinued use (life-time users who didExpand
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Cannabis use and vulnerability for psychosis in early adolescence--a TRAILS study.
AIMS To examine the direction of the longitudinal association between vulnerability for psychosis and cannabis use throughout adolescence. DESIGN Cross-lagged path analysis was used to identify theExpand
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