The Big Three Perfectionism Scale (BTPS) was created to integrate different aspects of perfectionism, including the newly conceptualized concept of narcissistic perfectionism. The goal of our two studies (N = 1341) was to examine the psychometric properties of the Polish adaptation of the BTPS, supporting the validity and portability of the…

The present study examined how narcissistic features, self-assessed lie- and truth-related abilities, and thinking processing style influence successful lying and convincing truth-telling. To this end, 100 undergraduate students completed the NPI, REI, and LTAAS questionnaires and drew two drawings each. They then presented to a panel of four…

The study aimed to investigate the correlations between psychological symptoms in high-achieving students with performance-oriented assessment, parental psychological control, parental achievement pressure, perfectionism, and academic expectation stress. The study group consisted of 1134 science high school students (658 females [57.1%], 486 males…

Background: Borderline personality symptoms include emotional dysregulation, high levels of impulsivity leading to self-harm and suicidality, an unstable sense of self, fears of abandonment, extremely turbulent relationships, and psychic pain. They are considered to disrupt normative adolescent development however their unique contribution to…

Callous-unemotional (CU) traits have proven important for designating children and adolescents showing a pattern of particularly severe, stable, and aggressive antisocial behaviors (Frick, Ray, Thornton, & Kahn, 2014). Individuals with secondary CU traits represent a subpopulation that are distinguished from those with primary CU traits by…