To assess the psychometric properties of the Personality Inventory for ICD-11 (PiCD, where ICD-11 is the International Classification of Diseases, 11th Revision), a sample of Italian community-dwelling adult participants (N = 1,122) was administered the PiCD, the Five-Factor Model Rating Form, the Big Five Inventory, the Personality Inventory for DSM–5 Short Form (where DSM–5 is the Diagnostic and Statistical Manual of Mental Disorders, fifth edition), and the Measure of Disordered Personality Functioning. Our findings supported the unidimensionality hypothesis for the PiCD Negative Affectivity, Detachment, and Dissocial scale items, whereas adequate fit indices were observed for the bifactor model of the PiCD Disinhibition and Anankastic item joint polychoric correlation matrix. The PiCD scales showed adequate internal consistency, test–retest reliability (n = 262), and meaningful relationships with five-factor model domains and their maladaptive variants. A four-factor model of the joint correlation matrix of the PiCD, Personality Inventory for DSM–5 Short Form, and the five-factor model composite score was provided with adequate fit. All PiCD scales were significantly associated with the impairment in personality functioning.

The present study aimed at assessing the impact of demographic characteristics, maladaptive personality traits and causal beliefs about COVID-19 on perceived emotional problems in a sample of Italian community-dwelling adults (N = 1043) in the first month of the social distancing period due to the COVID-19 pandemic in Italy. Hierarchical logistic regression analysis results showed that dysfunctional personality domains and non-scientifically supported causal beliefs explained all the variance that was originally explained by demographic variables (i.e., age and gender). In particular, negative affectivity and detachment represented relevant risk factors for reduced emotional well-being in our sample. A significant positive association was observed also between emotional problems and supernatural causal beliefs on the COVID-19 infection. Our data supported the importance of considering the impact of quarantine measures on psychological well-being, while suggesting possible risk factors related to individual differences in personality and causal beliefs.

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In an online sample of 1054 Italian community-dwelling adults, we assessed the relationships between the frequency of implementation of practices intended to prevent COVID-19 infection, degree of agreement with theories about the origin of the infections, and the frequency of use of different sources of information concerning the COVID-19 pandemic. The results showed that participants’ COVID-19-related preventive behaviors and causal beliefs were significantly associated with selected demographic variables and frequency of use of specific sources of information (e.g. scientific journals vs social media).

To evaluate the reliability and convergent validity of the Structured Clinical Interview for DSM-5 Alternative Model for Personality Disorders (SCID-5-AMPD) Module I and Module II, 88 adult psychotherapy participants were administered the Italian translations of the SCID-5-AMPD Module I and Module II, Level of Personality Functioning Scale-Brief Form (LPFS-BF), Level of Personality Functioning Scale-Self Report (LPFS-SF), Personality Inventory for DSM-5 (PID-5), Personality Diagnostic Questionnaire-4+ (PDQ-4+), and Structured Clinical Interview for DSM-5 Personality Disorders (SCID-5-PD) relying on a Williams crossover design. SCID-5-AMPD Module I and Module II showed excellent inter-rater reliability. In terms of convergent validity, meaningful associations were observed between SCID-5-AMPD Module I scores and self-report measures of Criterion A; similarly, SCID-5-AMPD Module II trait scores were meaningfully related to PID-5 trait scores. As a whole, our preliminary findings supported the clinical utility of DSM-5 AMPD.