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"Evolutionary psychology."
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Parasite stress and pathogen avoidance relate to distinct dimensions of political ideology across 30 nations
People who are more avoidant of pathogens are more politically conservative, as are nations with greater parasite stress. In the current research, we test two prominent hypotheses that have been proposed as explanations for these relationships. The first, which is an intragroup account, holds that these relationships between pathogens and politics are based on motivations to adhere to local norms, which are sometimes shaped by cultural evolution to have pathogen-neutralizing properties. The second, which is an intergroup account, holds that these same relationships are based on motivations to avoid contact with outgroups, who might pose greater infectious disease threats than ingroup members. Results from a study surveying 11,501 participants across 30 nations are more consistent with the intragroup account than with the intergroup account. National parasite stress relates to traditionalism (an aspect of conservatism especially related to adherence to group norms) but not to social dominance orientation (SDO; an aspect of conservatism especially related to endorsements of intergroup barriers and negativity toward ethnic and racial outgroups). Further, individual differences in pathogen-avoidance motives (i.e., disgust sensitivity) relate more strongly to traditionalism than to SDO within the 30 nations.
Journal Article
Family Matters
What motives do people prioritize in their social lives? Historically, social psychologists, especially those adopting an evolutionary perspective, have devoted a great deal of research attention to sexual attraction and romantic-partner choice (mate seeking). Research on long-term familial bonds (mate retention and kin care) has been less thoroughly connected to relevant comparative and evolutionary work on other species, and in the case of kin care, these bonds have been less well researched. Examining varied sources of data from 27 societies around the world, we found that people generally view familial motives as primary in importance and mate-seeking motives as relatively low in importance. Compared with other groups, college students, single people, and men place relatively higher emphasis on mate seeking, but even those samples rated kin-care motives as more important. Furthermore, motives linked to longterm familial bonds are positively associated with psychological well-being, but mate-seeking motives are associated with anxiety and depression. We address theoretical and empirical reasons why there has been extensive research on mate seeking and why people prioritize goals related to long-term familial bonds over mating goals. Reallocating relatively greater research effort toward long-term familial relationships would likely yield many interesting new findings relevant to everyday people’s highest social priorities.
Journal Article
The role of social reinforcement in norm transmission and cultural evolution
Work on cultural evolution, especially that of Boyd, Richerson, and Henrich, has said little about the role of reinforcement in cultural learning. This is surprising, for reinforcement is an old system, it is found across a diverse array of organisms, and it is a successful concept in various scientific disciplines. The main claim of this paper is that social forms of reinforcement play a role in cultural evolution. More specifically, I argue that starting early in human history, social approval and disapproval of behavior function as reinforcers and punishers; approval and disapproval thereby start a process whereby norms are transmitted. After giving arguments for these claims, I discuss work on social learning strategies—cultural rules specifying who to learn from and how to learn from them (Heyes in Philos Trans R Soc 371(1693):1–8, 2016. https://doi.org/10.1098/rstb.2015.0369). I suggest that the account I develop here can help explain the connection between these learning rules and cultural evolution. I illustrate this point with recent work on divination practices (Hong and Henrich in Hum Nat 32:622–651, 2021. https://doi.org/10.1007/s12110-021-09408-6). My account proposes that forms of social reinforcement can explain the spread and persistence of divination practices. Besides addressing the central question (a role for reinforcement in cultural evolution), my account indirectly touches on developing themes in cultural evolution, namely, normative psychology (Heyes in Perspect Psychol Sci, 2023; Birch Biol Philos 36:4, 2021. https://doi.org/10.1007/s10539-020-09777-9).
Journal Article
You’re dead to me! The evolutionary psychology of social estrangements and social transgressions
In our species, social connections with a broad array of individuals are foundational to success. On the flip side, we have evolved so as to not be exploited by others. This dynamic is the focus of the studies described here. Study 1 examined the psychology of social estrangements. The main prediction was that the number of estrangements one has would be predictive of various adverse psychological outcomes. Using a sample of 315 young adults, we found evidence for this prediction: A high number of estrangements corresponded to high scores on depressive tendencies and anxious attachment as well as low scores on social support. In Study 2, using a between-participants methodology, we manipulated transgression intensity, target of the transgression, and whether an apology was included. 288 young adults participated. Each participant was presented with a set of stimuli representing one level of each of the three independent variables and then provided ratings for several dependent variables, such as how angry and betrayed he or she would feel in the situation. Transgression intensity and target of the transgression had consistent significant effects on the dependent variables in the predicted directions. Presence of an apology generally had little effect. In both Studies 1 and 2, high scores on the Dark Triad predicted the outcomes as well: In Study 1, a high number of estrangements corresponded to high scores on the Dark Triad. In Study 2, high scores on the Dark Triad corresponded to strong negative responses to social transgressions. Implications for the evolutionary psychology of interpersonal relationships are discussed.
Journal Article
Accidental Homo sapiens : genetics, behavior, and free will
\"Two leading scientists reveal how we became the amazing creatures we are--and help us understand the biology that makes human beings uniquely capable of choice.\"--Dust jacket flap.
Book
The pandemic exposes human nature
Humans and viruses have been coevolving for millennia. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, the virus that causes COVID-19) has been particularly successful in evading our evolved defenses. The outcome has been tragic—across the globe, millions have been sickened and hundreds of thousands have died. Moreover, the quarantine has radically changed the structure of our lives, with devastating social and economic consequences that are likely to unfold for years. An evolutionary perspective can help us understand the progression and consequences of the pandemic. Here, a diverse group of scientists, with expertise from evolutionary medicine to cultural evolution, provide insights about the pandemic and its aftermath. At the most granular level, we consider how viruses might affect social behavior, and how quarantine, ironically, could make us susceptible to other maladies, due to a lack of microbial exposure. At the psychological level, we describe the ways in which the pandemic can affect mating behavior, cooperation (or the lack thereof), and gender norms, and how we can use disgust to better activate native “behavioral immunity” to combat disease spread. At the cultural level, we describe shifting cultural norms and how we might harness them to better combat disease and the negative social consequences of the pandemic. These insights can be used to craft solutions to problems produced by the pandemic and to lay the groundwork for a scientific agenda to capture and understand what has become, in effect, a worldwide social experiment.
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