To vaccinate or not to vaccinate? The role of personality.

This article presents findings on the personality traits of individuals who identified as either Vaxxers (V) or Anti-Vaxxers (AV) during the COVID-19 pandemic. The study administered measures of Dark Triad traits (Machiavellianism, Narcissism, and Psychopathy), trait emotional intelligence, and personality to a sample of 479 participants (283 Vs and 196 AVs) recruited via mTurk. Results indicated that Vaxxers scored higher on HEXACO Honesty and Conscientiousness while Anti-Vaxxers scored higher on the Dark Triad and trait emotional intelligence. These findings contribute to the understanding of personality differences between Vaxxers and Anti-Vaxxers during a public health crisis.

A behavioral genetic study of humor styles in an Australian sample.

The present study investigated the extent to which individual differences in humor styles are attributable to genetic and/or environmental factors in an Australian sample. Participants were 934 same-sex pairs of adult twins from the Australian Twin Registry (546 monozygotic pairs, 388 dizygotic pairs) who completed the Humor Styles Questionnaire (HSQ). The HSQ measures four distinct styles of humor - affiliative, self-enhancing, aggressive, and self-defeating. Results revealed that additive genetic and non-shared environmental factors accounted for the variance in all four humor styles, thus replicating results previously obtained in a sample of twins from the United Kingdom. However, a study conducted with a U.S. sample produced different results and we interpret these findings in terms of cross-cultural differences in humor.