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While grandiose narcissism is well-studied, vulnerable narcissism remains largely unexplored in the workplace context. Our study aimed to compare grandiose and vulnerable narcissism among managers and people from the general population. Within the managerial sample, our objective was to examine how these traits diverge concerning core personality traits and socially desirable responses. Furthermore, we endeavored to explore their associations with individual managerial performance, encompassing task performance, contextual performance, and counterproductive work behavior (CWB). Involving a pool of managerial participants ( N  = 344), we found that compared to the general population, managers exhibited higher levels of grandiose narcissism and lower levels of vulnerable narcissism. While both narcissistic variants had a minimal correlation ( r  = .02) with each other, they differentially predicted work performance. Notably, grandiose narcissism did not significantly predict any work performance dimension, whereas vulnerable narcissism, along with neuroticism, predicted higher CWB and lower task performance. Conscientiousness emerged as the strongest predictor of task performance. This study suggests that organizations might not benefit from managers with vulnerable narcissism. Understanding these distinct narcissistic variants offers insights into their impacts on managerial performance in work settings.

Narcissism, Machiavellianism and psychopathy are commonly referred to as the Dark Triad of personality. In the current study, we examined the structure of the Dark Triad measured by the Polish version of the Short Dark Triad (SD3). The study was conducted with 1012 individuals in Poland. The analyses were performed in four steps: (1) the external validity of the SD3 was tested to provide evidence that SD3 is a valid measure of the three dark traits; (2) the structural validity of the SD3 was tested using competing models in confirmatory factor analyses; (3) the structure of narcissism was tested; and (4) the combined bifactor model of Machiavellianism and psychopathy was tested. The results support the differentiation of the Dark Triad into a Dark Dyad (Machiavellianism and psychopathy) and narcissism, which can be used in further theoretical work and new operationalization of the Dark Triad.

The present studies were aimed at developing the Hungarian version of the Short Dark Triad questionnaire (SD3-HU). The internal structure of the translated questionnaire was examined with confirmatory factor analysis and exploratory structural equation modeling. Then the construct and concurrent validity of the Hungarian version was tested. The obtained results were based on a total of seven independent samples ( N TOTAL  = 2161). While the internal structure of the SD3-HU showed inconsistencies with that of the original SD3, it proved consistent with adaptations developed in other languages. The SD3-HU showed adequate construct and concurrent validity. In line with the conceptual framework of, and previous empirical findings on the Dark Triad, each dark trait showed the expected associations with broad personality dimensions, sensation seeking, character strengths, work motivation, and counterproductive work behaviors. Furthermore, self-ratings on the SD3-HU were consistent with peer ratings. In sum, the SD3-HU is a reliable and valid measure of the dark traits.

This research was designed to adapt and investigate the psychometric properties of the Short Dark Triad measure (Jones and Paulhus Assessment, 21(1), 28-41, 2014) in a German sample within four studies (total N = 1463); the measure evaluates three personality dimensions: narcissism, psychopathy, and Machiavellianism. The structure of the instrument was analysed by Confirmatory Factor Analyses procedure. It indicated that the three-factor structure had the best fit to the data. Next, the Short Dark Triad measure was evaluated in terms of construct, convergent and discriminant validity, internal consistency (≥ .72), and test-retest reliability during a 4-week period (≥ .73). Concurrent validity of the SD3 was supported by relating its subscales to measures of the Big Five concept, aggression, and self-esteem. We concluded that the Short Dark Triad instrument presented high cross-language replicability. The use of this short inventory in the investigation of the Dark Triad personality model in the German language context is suggested.

Recent studies have established the degree of agreement for the detection of personality traits using composite images derived from individuals scoring ‘high’ or ‘low’ on these traits. The present study requested to re-examine these findings by presenting all possible combinations deriving from a Dark Trait (Machiavellianism, Psychopathy, and Narcissism) × Trait Level (‘low’, ‘high’) factorial design, for images of female and male faces taken from the Personality Faceaurus . The female participants exhibited markedly lower success in detecting Narcissism, particularly for male faces, and better success in detecting both Machiavellianism and Psychopathy. For the male participants, one notes the relatively lower success at detecting Psychopathy for female faces, and the relatively lower success at detecting Narcissism for male faces.

Amazonian communities traditionally use plant leaves to wrap food; however, there is little information available on the species and their health benefits. This study aimed to characterise the physicochemical properties of the samples, including pH, total soluble solids, total titratable acidity, moisture content, ash, and mineral composition determined by atomic absorption spectroscopy. Major bioactive compounds, including vitamin C, organic acids, carotenoids, chlorophylls and derivatives, and phenolic compounds, were determined by liquid chromatography. The antioxidant potential was examined using ABTS and DPPH, antimicrobials (bacteria and fungi), biofilm inhibition (bacteria), and the haemolytic activity of Calathea lutea and Calathea inocephala leaves was evaluated. C. lutea showed high iron (2930.0 mg/100 g DW), vitamin C (4.6 mg/100 g DW), and tartaric acid (722.3 mg/100 g DW). C. inocephala showed high lutein (83.5 mg/100 g DW) and pheophytin b (177.5 mg/100 g DW). Major phenolics included caffeic acid (16,996.3 mg/100 g DW). Extracts at 1 mg/mL inhibited multidrug resistance in Enterococcus faecalis and Enterococcus faecium and showed strong antibiofilm activity against Listeria monocytogenes. The antioxidant activity was 4.6 mmol TE/100 g DW in the DPPH method, and the compound was haemocompatible at concentrations below 600 µg/mL. These findings highlight its biotechnological potential and importance for sustainable community use.

Contexto. El uso desadaptativo de las redes sociales representa un problema de salud pública en aumento a escala mundial, que afecta especialmente a jóvenes y al ámbito universitario. En el caso de México, los índices de prevalencia en estudiantes de educación superior oscilan entre el 18% y el 42%, lo que evidencia la necesidad de detectar factores predictivos y desarrollar estrategias de intervención ajustadas a esta población. Problema. Existe falta de consenso sobre el papel moderador de variables demográficas como edad y género en Uso Problemático de Redes Sociales (UPRS), cuestionando intervenciones basadas solo en reducción de tiempo de uso. Objetivo. Este estudio busca determinar los principales factores predictivos de la adicción a redes sociales en estudiantes universitarios de México, utilizando un modelo de regresión logística y centrándose en variables como la edad, el tiempo de uso diario y el género, en consonancia con los Objetivos de Desarrollo Sostenible 3 y 4. Metodología. Estudio transversal realizado entre enero y marzo de 2025 con 705 estudiantes de la Universidad Autónoma de Aguascalientes -UAA- , se aplicó BSMAS validada (α=0.89; r=0.76 con IAT) y regresión logística binaria controlando por género y año académico. Hallazgos teóricos y prácticos. La Edad mostró efecto protector (OR=0.37, p=0.006), reduciendo probabilidad de adicción en 63% por año adicional. Género masculino asociado a mayor riesgo (69.6% vs 60.1%, p=0.012). Horas de uso no significativas. Hallazgos sustentan modelo I-PACE (Interaction of Person-Affect-Cognition-Execution) y sugieren intervenciones diferenciadas por género y año académico. Originalidad. Integración de variables de desarrollo y género en modelo predictivo aplicable al contexto universitario mexicano, bajo enfoque de innovación en procesos (Manual de Oslo). Conclusiones y limitaciones. Edad y género son predictores más robustos que tiempo de uso. Limitación transversal sugiere futuros estudios longitudinales para inferir causalidad.

According to Rev. Rul. SD3, if an assessment has not been paid before the expiration of the 3 month time limit, upon notification of the lodging party, the fine will be remitted from 20% to 10%, if the assessment is paid within one month of the date of the notice.