Short form of the five-factor narcissism inventory: A Japanese adaptation

There is a pressing need for more evidence from regions from Western countries to draw conclusive outcomes concerning psychological sciences. Hence, the study intends to develop the Japanese version of the short form of the Five-Factor Narcissism Inventory; (FFNI-SF) to assess reliability and validity, and to explore the psychometric adaptation of a broad range of narcissistic personalities in relation to the Japanese people. Altogether, 449 Japanese undergraduate students took part in this study. The findings denoted that FFNI-SF had an acceptable level of reliability and correlated well with existing Japanese scales. Based on the exploratory factor analysis, the lack of empathy was excluded from grandiosity, yielding an isolated factor. However, the exploratory factor analysis revealed that the lack of empathy had nothing to do with Japanese narcissism

Dark Triadの統合モデルの提案とその妥当性の検討

早大学位記番号:新8534早稲田大

A validation of the Japanese adaptation of the Big Five Inventory-2

The purpose of this study was to adapt a Japanese version of the Big Five Inventory-2 (BFI-2-J) to examine its factor structure, reliability, validity, and measurement invariance. The BFI-2-J assesses five domains and 15 facets of the Big Five personality traits. We analyzed two datasets: 487 Japanese undergraduates and 500 Japanese adults. The results of the principal component analysis and confirmatory factor analysis revealed that the domain-facet structure of the BFI-2-J was similar to that of other language versions. The reliability of the BFI-2-J is sufficient. The correlation coefficients between the BFI-2-J and the other Big Five and self-esteem measures supported convergent and discriminant validity. Moreover, we confirmed measurement invariance across age and sex groups in domain-level and facet-level models. The results suggest that the BFI-2-J is a good instrument for measuring the Big Five personality traits and their facets in Japan. The BFI-2-J is expected to be useful in Japanese personality research and international comparative research

I really am more important than you: The relationship between the Dark Triad, cognitive ability, and social value orientations in a sample of Japanese adults

This study examined the relationship between the Dark Triad of personality, cognitive ability, and social value orientations. After gender and age were controlled for, dark personality traits and cognitive ability were examined for their predictive utility of prosocial, individualistic, and competitive social value orientations. A sample of 4730 Japanese adults (60.25% men, 39.75% women) aged between 18 and 71 (M = 49.62, SD = 11.06) completed a large-scale cross-sectional online survey. Results showed that dark personality traits negatively predict prosocial value orientation, whereas higher cognitive ability was linked with an increase in prosocial behavior. Further, higher scores in all dark personality traits predicted an individualistic social value orientation, while Machiavellianism and low cognitive ability predicted competitive behaviors. Results suggest that when there is a conflict between individual and collective interests, individuals high in dark personality traits have a preference for proself behavior and tend to avoid prosocial decisions, prioritizing their benefit over others'