Abundant research indicates that the COVID-19 pandemic has been negatively affecting mental health in adolescence. Few works, however, benefit from data from the same sample before and after the onset of the pandemic. The present longitudinal study involved a non-clinical group of 136 Italian adolescents (Mage = 16.3 years ± 1.08, 67% girls) to investigate their psychological response to the first lockdown and explore the role of a protective trait (i.e., Positivity) in moderating the effect of Intolerance of Uncertainty (IU) on internalizing symptoms before and during the COVID-19 outbreak. Participants completed self-report questionnaires assessing psychopathological symptoms, psychological well-being, IU, and Positivity on three separate occasions: October 2019 (T1), January 2020 (T2), and April 2020 (T3). The results showed that internalizing and externalizing symptoms as well as psychological well-being did not vary significantly over time. Positivity was found to significantly moderate the relationship between IU and internalizing symptoms at T3 (i.e., during the COVID-19 lockdown) only. Overall, our findings suggest that the teenagers’ good adjustment to the initial phase of the pandemic might have been associated with the enhanced weight of the Positivity trait, which may have encouraged a positive attitude towards self, life, and the future.

The assessment of personality pathology based on dimensional models may improve self-other agreement, but previous research mainly adopted a categorical approach and overlooked the role of the person of the therapist. Our study examined patient-clinician agreement in a mixed sample of Italian outpatients using the Personality Inventory for DSM-5 (PID-5) and the PID-5-Informant Form (PID-5-IRF). Moreover, the role of clinician personality traits on agreement was preliminary explored. Sixty-eight outpatients (51.4% male, M = 30.30, SD = 12.05 years) and their treating clinicians (N = 22; 77.3% female, M = 43.77 + 8.45 years) entered the study. Patients completed the PID-5, whereas clinicians filled-in the PID-5-Brief Form (PID-5-BF) and the PID-5-IRF for each patient they involved. A multilevel Bayesian analysis showed that rank-order agreement was large for domains (mean r = .60) and moderate for facets (mean r = .44). As regards mean-level agreement, patient ratings on cognitive/perceptual dysregulation, distractibility, eccentricity, and emotional lability were higher than clinician ratings, whereas patients' scores on depressivity were lower than clinicians' ones. Scores on the PID-5-BF detachment positively predicted agreement on anhedonia, anxiousness, depressivity, distractibility, separation insecurity, and suspiciousness, while scores on the PID-5-BF negative affectivity, antagonism, and disinhibition negatively predicted agreement on few specific facets. Current findings suggest that clinician personality traits may contribute to agreement on maladaptive personality traits, but areas of discrepancies remain in case of low observable internal ones. Since patient-clinician agreement is crucially involved in therapeutic alliance, further research on this issue is highly encouraged.