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Contemplation of death increases support of ingroup ideologies, a result explained by proponents of terror management theory (TMT) as an attempt to buffer existential anxiety. While TMT claims that only death-salient stimuli yield such effects, an evolutionary perspective suggests that increased intergroup bias may occur in response to a wide variety of(More)
Comparing food taboos across 78 cultures, this paper demonstrates that meat, though a prized food, is also the principal target of proscriptions. Reviewing existing explanations of taboos, we nd that both functionalist and symbolic approaches fail to account for meat's cross-cultural centrality and do not ree ect experience-near aspects of food taboos,(More)
Extending a model relating xenophobia to disease avoidance [Faulkner, J., Schaller, M., Park, J. H., & Duncan, L. A. (2004). Evolved disease-avoidance mechanisms and contemporary xenophobic attitudes. Group Processes & Intergroup Relations, 7(4), 333–353.], we argue that both interand intragroup attitudes can be understood in terms of the costs and benefits(More)
The social science literature contains numerous examples of human tribalism and parochialism-the tendency to categorize individuals on the basis of their group membership, and treat ingroup members benevolently and outgroup members malevolently. We hypothesize that this tribal inclination is an adaptive response to the threat of coalitional aggression and(More)
Disgust operates in many domains of behavior. On the presumption that facets of this emotion evince adaptive design, we conducted a cross-sectional study of 307 women, investigating changes in disgust sensitivity across the menstrual cycle. Two hypotheses were tested, namely (i) sexual disgust is an adaptation that serves to reduce participation in(More)
Recent research employing a disease-threat model of the psychology of intergroup attitudes has provided preliminary support for a link between subjectively disease-salient emotional states and ethnocentric attitudes. Because the first trimester of pregnancy is a period of particular vulnerability to infection, pregnant women offer an opportunity to further(More)
While substantial evidence supports the existence of Westermarck’s [Westermarck, E. (1891). The history of human marriage. London: Macmillan & Co.] hypothesized inbreeding avoidance mechanism, questions remain. We examined the Westermarck hypothesis using third-party reactions to a fictional case of sibling incest, a method paralleling that of Lieberman et(More)
Although a considerable body of research explores alterations in women's mating-relevant preferences across the menstrual cycle, investigators have yet to examine the potential for the menstrual cycle to influence intergroup attitudes. We examined the effects of changes in conception risk across the menstrual cycle on intergroup bias and found that(More)
Experimentally investigating the relationship between moral judgment and action is difficult when the action of interest entails harming others. We adopt a new approach to this problem by placing subjects in an immersive, virtual reality environment that simulates the classic "trolley problem." In this moral dilemma, the majority of research participants(More)
The terminal investment hypothesis (Williams [1966] Adaptation and Natural Selection; Princeton, NJ: Princeton University Press) holds that reproductive effort should increase over time in iteroparous species in which reproductive value declines with age. Attempts to model this hypothesis and test it in various species have produced mixed results.(More)