Author:

Keywords:

Social Sciences, Psychology, Clinical, Psychology, PID-5, psychoticism, psychosis, psychotic symptoms, discriminant function analysis, antipsychotic medication, SCHIZOTYPAL PERSONALITY, 5-FACTOR MODEL, TRAITS, SCHIZOPHRENIA, RISK, NEUROTICISM, EXPERIENCES, VULNERABILITY, POPULATION, CONTINUITY, Adolescent, Adult, Aged, Diagnostic and Statistical Manual of Mental Disorders, Discriminant Analysis, Female, Humans, Male, Middle Aged, Personality Disorders, Personality Inventory, Psychotic Disorders, Young Adult, 1701 Psychology, Clinical Psychology, 5201 Applied and developmental psychology, 5202 Biological psychology

Abstract:

Recent studies have successfully investigated the validity of the DSM-5 Alternative Model for Personality Disorders. In a final sample of 174 psychiatric patients, the present study examined the relationship between the Personality Inventory for the DSM-5 (PID-5) and syndromal psychosis. Results showed that patients diagnosed with versus without a psychotic disorder significantly differed on all PID-5 domains except Antagonism. Discriminant function analysis indicated that lower Detachment, lower Negative Affect, lower Disinhibition, and higher Psychoticism best discriminated patients with a psychotic disorder from patients with other psychiatric conditions. Subsequent stepwise discriminant analysis on all facet scales of the contributing PID-5 domains revealed that higher Unusual Beliefs, lower Depressivity, and lower Distractibility contributed the most to this differentiation. PID-5 Psychoticism scores showed moderate correlations with current psychotic symptoms and were not influenced by dose of antipsychotic medication. Our results support the ability of the PID-5 to discriminate between patients with and without psychotic disorder.