Abstract
Aim of the studyThis study aimed to operationalize a version of the Dimensional Clinical Personality Inventory 2 (IDCP-2) for the screening of typical traits of the Paranoid personality disorder (PPD) from the perspective of the HiTOP, as well as investigate its internal and external validity.Subject or material and methodsWe selected IDCP-2 factors that appropriately represented PPD traits according to the HiTOP. We created new items for a Rudeness factor. The participants were 454 Brazilian adults (aged 18-70 years). We administered the following scales: IDCP-PPD, PID-5, and CAT-PD-SV.ResultsWe found a one higher-order factor structure for the IDCP-PPD The factors that composed this higher-order factor reflect traits from both HiTOP spectra witch PPD is represented, Thought disorder and Antagonistic externalizing. The expected correlations between IDCP-PPD factors and external measures were observed. Groups comparison indicated people with high levels of pathological traits in the external measures showing higher means in the IDCP-PPD scores in comparison to people with lower means in these measures.DiscussionThe factors of the IDCP-PPD demonstrated a good capacity for the assessment of PPD traits.ConclusionsThe findings of our study indicate the IDCP-PPD scale as a useful tool for operationalizing HiTOP for clinical practice. Future studies should test our findings in patients with a PPD diagnosis.
Highlights
Mental disorders have been recognized based on categorical models, as presented in diagnostic manuals such as ICD-10 and DSM-5
We investigated the psychometric properties of IDCP-Paranoid personality disorder (PPD) through exploratory factor analysis, with Geomim rotation and Maximum Likelihood Robust (MLR) estimator
HiTOP is a hierarchical dimensional taxonomic model that aims to change the current panorama of the classification of mental disorders based on empirical evidence [3,4]
Summary
Mental disorders have been recognized based on categorical models, as presented in diagnostic manuals such as ICD-10 and DSM-5. The HiTOP was developed from empirical evidence on the classification of psychopathologies and is hierarchically organized into five levels, from the broadest to the most specific: super-spectra, spectra, subfactors, syndromes/disorders and, maladaptive traits. The model lacks studies that expand its use in clinical practice [5,6]. The developers of the model recommend as high priority the development or update of assessment scales based on the HiTOP [3]
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