LAUSR

Abstract Research investigating individual differences in personality and altruistic behaviour has focused predominantly on traits described within the Five-Factor Model (FFM). The objective of the present study was to examine if the same personality dimensions which predict donation behaviour (Kowalski et al., 2021) and are thought to be “beyond” the FFM also predict self-report altruism. An online survey including the Supernumerary Personality Inventory (Paunonen, 2002), the Self-Report Altruism Scale (Rushton et al., 1981), and the Compassionate Altruism Scale (O'Connor et al., 2015) was completed by 256 participants. Regression analysis revealed that the SPI accounted for significant variance in both measures of altruism. Specifically, age, integrity, femininity, and risk-taking positively predicted scores on the Self-Report Altruism Scale. Humorousness positively predicted compassionate altruism towards family, while compassionate altruism towards strangers was positively predicted by religiosity, and negatively predicted by femininity. Overall, the results highlight the importance of incorporating additional dimensions of personality into explorations of altruism and related prosocial behaviours. Limitations and future directions are discussed.