In search of hidden threats: A scoping review on paranoid presentations in personality disorders.

Recent diagnostic developments suggest that paranoia is a transdiagnostic characteristic common to several personality disorders rather than a personality disorder per se. Nonetheless, empirical literature fails to provide comprehensive and univocal findings on whether and how paranoid presentations relate to different personality disorders. In the present scoping review, we map the empirical literature on paranoid presentations in personality disorders, considering the entire spectrum of paranoid manifestations (i.e., the paranoia hierarchy). In selecting original quantitative studies on paranoid presentations in personality-disordered patients, we screened 4,433 records in PsycArticles, PsycInfo and PUBMED. We eventually included 47 eligible studies in the review. Our synthesis indicates consistent empirical evidence of a wide range of paranoid presentations in Paranoid, Schizotypal and Borderline personality disorders. Conversely, little empirical literature exists on paranoid presentations in other personality disorders. Preliminary findings suggest broad-severity paranoid presentations, ranging from milder to severe forms, in Paranoid, Schizotypal and Borderline personality disorders. There is also some evidence of milder forms of paranoia in Avoidant, Antisocial and Narcissistic personality disorders. Conversely, there is poor evidence of paranoid presentations in Schizoid, Histrionic, Dependent or Obsessive-compulsive personality disorders. Research gaps and recommendations for improving empirical research on paranoid presentations in personality disorders are discussed.

Measurement Invariance of the Pathological Narcissism Inventory and Multimethod Examination of Narcissistic Presentations in Community and Clinical Samples.

The Pathological Narcissism Inventory (PNI) is extensively used in recent empirical literature on pathological narcissism. However, most studies using the PNI are community-based, and no studies have used the PNI to investigate narcissistic presentations in personality disordered patients. This study investigates measurement invariance of the PNI in community participants and patients with personality disorders, and examines differences of narcissistic presentations in these samples through a multimethod approach. Results show that the PNI can be used reliably to measure and compare traits of pathological narcissism in community participants and patients with personality disorders. Personality disordered patients show higher traits reflecting vulnerable narcissism and overt manifestations of grandiose narcissism, compared with controls. Finally, network analysis indicates that traits of grandiose fantasies and entitlement rage have a central role in defining manifestations of PNI pathological narcissism, regardless of the presence of an underlying personality disorder. Research and clinical implications are discussed.