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The purpose of this study was to investigate the relationship between personality traits and hoarding behavior during the coronavirus disease (COVID-19) pandemic. An online survey was conducted among 530 Japanese adults (274 women; M age = 44.26, SD age = 8.43) who were living in Tokyo when a state of emergency was declared. Personality traits were assessed using measures of the Big Five personality traits and greed. They also responded to measures of tendencies to hoard essential and countermeasure products during the COVID-19 pandemic. Correlation analysis revealed that Extraversion, Neuroticism, Openness, and dispositional greed were positively associated with hoarding behavior. Multiple regression analysis revealed that individuals with high Agreeableness, Neuroticism, Openness, and dispositional greed tended to hoard products. The present findings suggest that personality traits account for behavioral responses to the COVID-19 pandemic in Japan. The emergent relationship between hoarding behavior and each personality trait is discussed in relation to the existing literature.

This study investigated the age differences in the Dark Triad (DT) traits with 2 independent samples. Personality was measured using the Short Dark Triad and the Dark Triad Dirty Dozen. Results showed a significant negative correlation between age and DT traits except for narcissism, which differed between the samples. Significant age-by-sex interaction effects were observed for Machiavellianism and the DT composite score, indicating that women showed a steeper downward age trend in dark personalities.

Abstract:Investigated here were correlations between factors characteristic of competitive sports, for instance, type of athletic event and level of competition and the dark triad-Machiavellianism, psychopathy, and narcissism. A questionnaire survey was conducted with 506 Japanese university athletes (217 male and 289 female, mean age = 19.9, SD = 0.8). Three-way analysis of variance (ANOVA) indicated significant and marginally significant main effects of gender (male/female), type of athletic event (record-style events/gamestyle events), and competitive level (low-competitive group/high-competitive group) on total dark triad score and its sub-scale scores (Machiavellianism, psychopathy, and narcissism), as well as marginally significant two-way and three-way interactions among their specific combinations. These results suggest correlations between the dark triad and gender, type of athletic event, and competitive level. Future studies should likely investigate causal relationships between the dark triad's strength and athletes' processes of exhibiting performance and problem behaviors.

The purpose of this study was to develop the Japanese version of the Dispositional Greed Scale (J-DGS), and to examine its reliability and validity. The participants in this study were Japanese university students (N = 856). The principal component analysis indicated that the J-DGS had a unidimensional structure and adequate internal consistency. There were positive associations between the J-DGS and envy, psychological entitlement, materialism, impulsive buying behavior, extravagance, and neuroticism. Conversely, J-DGS scores were negatively correlated with self-control, self-esteem, life satisfaction, and agreeableness. These results, which are consistent with previous studies, confirmed the concurrent validity of the J-DGS.