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Sex differences in birth weight depending on the mother's condition: testing the Trivers-Willard hypothesis in Indian twins
Sex differences in birth weight depending on the mother's condition: testing the Trivers-Willard hypothesis in Indian twins
Trivers and Willard (1973) hypothesized that mothers who give birth to sons when their condition is good and daughters whe...
Cultural and contextual variation in first mover norms of ownership: evidence from an Achuar community
Cultural and contextual variation in first mover norms of ownership: evidence from an Achuar community
The evolutionary social sciences have long been concerned with the search for human universals, and questions surrounding ...
Laughter and ratings of funniness in speed-dating do not support the fitness indicator hypothesis of humour
Laughter and ratings of funniness in speed-dating do not support the fitness indicator hypothesis of humour
Despite the presence of humour in virtually all human cultures, its evolutionary basis is not well understood (Fry, 1994; ...
Costly inductions as a commitment-selection strategy: Assessing Hazing's relationship with attrition in a college fraternity
Costly inductions as a commitment-selection strategy: Assessing Hazing's relationship with attrition in a college fraternity
Available online 20 September 2023Author links open overlay panel, , AbstractSocial scientists have often claimed or impli...
Prestige, conformity and gender consistency support a broad-context mechanism underpinning mate-choice copying
Prestige, conformity and gender consistency support a broad-context mechanism underpinning mate-choice copying
Mate choice is an important decision in sexually reproducing species, affecting the genes passed on to offspring, as well ...
Editorial overview: “Dispatches from the field: insights from studies in ecologically diverse communities: Part 1”
Editorial overview: “Dispatches from the field: insights from studies in ecologically diverse communities: Part 1”
Available online 10 September 2023Author links open overlay panel, Section snippetsDeclaration of Competing InterestThe au...
Mating fast and slow? Sociosexual orientations are not reflective of life history trajectories
Mating fast and slow? Sociosexual orientations are not reflective of life history trajectories
For over a century, biologists have sought to explain the array of mating strategies across and within species: why indivi...
Human infant cries communicate distress and elicit sex stereotypes: Cross cultural evidence
Human infant cries communicate distress and elicit sex stereotypes: Cross cultural evidence
The human voice carries cues to a variety of biological and social dimensions of a speaker including sex, age, body size, ...
Evidence from millions of births refutes the Trivers-Willard hypothesis in humans
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Decision-making under climate shocks and economic insecurity: Ranching in rural Baja California Sur, Mexico
Two major sources of risk to small-scale livestock managers globally are environmental variability and economic insecurity...
The influence of friendship on children's fairness concerns in three societies
Friendship is a universal feature of human groups, but the manifestation of friendship varies considerably across human so...
Parochial altruism: What it is and why it varies
Parochial altruism (PA), or ingroup favoritism paired with outgroup hostility (Choi & Bowles, 2007), is assumed to be ...
Mating-related stimuli induce rapid shifts in fathers' assessments of infants
Life History Theory posits that organisms have a finite amount of energy that can be partitioned among growth, maintenance...
Social network accuracy among children and adolescents in a rural Dominican community
Knowledge and understanding of social networks is a critical evolved human skill (Chapais, 2011; Dunbar & Shultz, 2007...
Objectively measured facial traits predict in-person evaluations of facial attractiveness and prosociality in speed-dating partners
Faces are not only essential for identifying individuals, but they are also an important contributor to evaluations of phy...
What is reciprocity? A review and expert-based classification of cooperative transfers
The concept of reciprocity has been part of the social sciences since the eighteenth century. The term became prominent in...
Tit for tattling: Cooperation, communication, and how each could stabilize the other
Available online 15 June 2023Author links open overlay panel, Highlights•We find a state in which cooperation and communic...
The influence of language on the evolution of cooperation
Humans' cognitive abilities are unique amongst animals (Herrmann, Call, Hernàndez-Lloreda, Hare, & Tomasello, 2007; Ma...
In it together: evidence of a preference for the fair distribution of effort in joint action
Available online 4 May 2023Author links open overlay panel, AbstractA growing body of theoretical and empirical work sugge...
The intersection of evolutionary science and law
Available online 3 May 2023Author links open overlay panel, Section snippetsOwnership and fairnessThe next set of papers i...
Decades of Trivers-Willard research on humans: What conclusions can be drawn?
The Trivers-Willard hypothesis is a classic in evolutionary biology (Salmon & Hehman, 2020; Trivers & Willard, 197...
Trivial giving as a signal of trustworthiness
Reciprocal relationships among human beings have historically been essential for achieving greater benefits, such as farmi...
Punitive justice serves to restore reciprocal cooperation in three small-scale societies
Among the Yolngu of Australia, interclan killings were sometimes followed by the makarrata ceremony (Warner, 1958). The tw...
Stereotypes of criminality in the U.S. track ecology, not race
Race affects legal outcomes in the United States. Compared to White people, Black people are more likely to be stopped and...
In need-based sharing, sharing is more important than need
Available online 22 March 2023Author links open overlay panel, , AbstractCooperative resource sharing is widespread across...
No effects of exposure to women's fertile window body scents on men's hormonal and psychological responses
Do men respond to women's peri-ovulatory body odors in functional ways? Prior studies reported more positive changes in me...
When Pigs Fly: A review of The Dawn of Everything: A New History of Humanity by David Graeber and David Wengrow.
L. BetzigEusociality in humansL. BetzigBetzig, Laura. 2021. A note on religion special issue of Evolutionary PsychologyN. ...
The impact of gossip, reputation, and context on resource transfers among Aka hunter-gatherers, Ngandu horticulturalists, and MTurkers
Humans evolved in groups that cooperated to obtain food, defend themselves from predators and other humans, and care for c...