13 found

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  1.  1
    Jane Lancaster and Human Nature.Robert K. Hitchcock - 2020 - Human Nature 31 (2):120-122.
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  2.  3
    Correction To: Sex Differences in the Association of Family and Personal Income and Wealth with Fertility in the United States.Rosemary L. Hopcroft - 2020 - Human Nature 31 (2):196-202.
    Because of an error in calculation of coefficients reported in the article “Sex Differences in the Association of Family and Personal Income and Wealth with Fertility in the United States”.
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  3. Can Development Programs Shape Cooperation?Lucentezza Napitupulu, Jetske Bouma, Sonia Graham & Victoria Reyes-García - 2020 - Human Nature 31 (2):174-195.
    Empirical studies among small-scale societies show that participation in national development programs impact traditional norms of community cooperation. We explore the extent to which varying levels of village and individual involvement in development policies relate to voluntary cooperation within community settings. We used a field experiment conducted in seven villages from an indigenous society in Indonesia known for their strong traditional cooperative norms, the Punan Tubu. We framed the experiment in terms of an ongoing government house-building program. The results indicate (...)
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  4.  8
    Why Class Formation Occurs in Humans but Not Among Other Primates.Sagar A. Pandit, Gauri R. Pradhan & Carel P. Van Schaik - 2020 - Human Nature 31 (2):155-173.
    Most human societies exhibit a distinct class structure, with an elite, middle classes, and a bottom class, whereas animals form simple dominance hierarchies in which individuals with higher fighting ability do not appear to form coalitions to “oppress” weaker individuals. Here, we extend our model of primate coalitions and find that a division into a bottom class and an upper class is inevitable whenever fitness-enhancing resources, such as food or real estate, are exploitable or tradable and the members of the (...)
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  5. Effects of Individual Mortality Experience on Out-of-Wedlock Fertility in Eighteenth- and Nineteenth-Century Krummhörn, Germany.Katharina E. Pink, Kai P. Willführ, Eckart Voland & Paul Puschmann - 2020 - Human Nature 31 (2):141-154.
    Life history theory predicts that exposure to high mortality in early childhood leads to faster and riskier reproductive strategies. Individuals who grew up in a high mortality regime will not overly wait until they find a suitable partner and form a stable union because premature death would prevent them from reproducing. Cox proportional hazard models were used to determine whether women who experienced sibling death during early childhood reproduced earlier and were at an increased risk of giving birth to an (...)
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  6. Changes in Juvenile Foraging Behavior Among the Hadza of Tanzania During Early Transition to a Mixed-Subsistence Economy.Trevor R. Pollom, Kristen N. Herlosky, Ibrahim A. Mabulla & Alyssa N. Crittenden - 2020 - Human Nature 31 (2):123-140.
    The Hadza foragers of Tanzania are currently experiencing a nutritional shift that includes the intensification of domesticated cultigens in the diet. Despite these changes, no study, to date, has examined the possible effects of this transition on the food collection behavior of young foragers. Here we present a cross-sectional study on foraging behavior taken from two time points, 2005 and 2017. We compare the number of days foraged and the type and amount of food collected for young foragers, aged 5–14 (...)
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  7.  5
    No Association between 2D:4D Ratio and Hunting Success among Hadza Hunters.Duncan N. E. Stibbard-Hawkes - 2020 - Human Nature 31 (1):22-42.
    The ratio of index- and ring-finger lengths is thought to be related to prenatal androgen exposure, and in many, though not all, populations, men have a lower average digit ratio than do women. In many studies an inverse relationship has been observed, among both men and women, between 2D:4D ratio and measures of athletic ability. It has been further suggested that, in hunter-gatherer populations, 2D:4D ratio might also be negatively correlated with hunting ability, itself assumed to be contingent on athleticism. (...)
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  8.  5
    In Memoriam.Peter B. Gray, Alyssa N. Crittenden, Coren L. Apicella, Colette Berbesque, Duncan N. E. Stibbard-Hawkes & Brian Wood - 2020 - Human Nature 31 (1):1-8.
    The ratio of index- and ring-finger lengths is thought to be related to prenatal androgen exposure, and in many, though not all, populations, men have a lower average digit ratio than do women. In many studies an inverse relationship has been observed, among both men and women, between 2D:4D ratio and measures of athletic ability. It has been further suggested that, in hunter-gatherer populations, 2D:4D ratio might also be negatively correlated with hunting ability, itself assumed to be contingent on athleticism. (...)
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  9.  6
    In Memoriam.Edward H. Hagen & Lawrence S. Sugiyama - 2020 - Human Nature 31 (1):9-21.
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  10.  5
    The Effects of the Mating Market, Sex, Age, and Income on Sociopolitical Orientation.Francesca R. Luberti, Khandis R. Blake & Robert C. Brooks - 2020 - Human Nature 31 (1):88-111.
    Sociopolitical attitudes are often the root cause of conflicts between individuals, groups, and even nations, but little is known about the origin of individual differences in sociopolitical orientation. We test a combination of economic and evolutionary ideas about the degree to which the mating market, sex, age, and income affect sociopolitical orientation. We collected data online through Amazon’s Mechanical Turk from 1108 US participants who were between 18 and 60, fluent in English, and single. While ostensibly testing a new online (...)
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  11.  3
    Breastfeeding Duration and the Social Learning of Infant Feeding Knowledge in Two Maya Communities.Luseadra J. McKerracher, Pablo Nepomnaschy, Rachel MacKay Altman, Daniel Sellen & Mark Collard - 2020 - Human Nature 31 (1):43-67.
    Variation in the durations of exclusive breastfeeding and any breastfeeding is associated with socioecological factors. This plasticity in breastfeeding behavior appears adaptive, but the mechanisms involved are unclear. With this concept in mind, we investigated whether durations of exBF and anyBF in a rural Maya population covary with markers of a form of socioecological change—market integration—and whether individual factors and/or learning from others in the community mediate these changes. Using data from 419 mother-child pairs from two Guatemalan Maya villages, we (...)
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  12.  4
    No Association between 2D:4D Ratio and Hunting Success among Hadza Hunters.Duncan N. E. Stibbard-Hawkes - 2020 - Human Nature 31 (1):22-42.
    The ratio of index- and ring-finger lengths is thought to be related to prenatal androgen exposure, and in many, though not all, populations, men have a lower average digit ratio than do women. In many studies an inverse relationship has been observed, among both men and women, between 2D:4D ratio and measures of athletic ability. It has been further suggested that, in hunter-gatherer populations, 2D:4D ratio might also be negatively correlated with hunting ability, itself assumed to be contingent on athleticism. (...)
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  13.  7
    Effortful Control Development in the Face of Harshness and Unpredictability.Shannon M. Warren & Melissa A. Barnett - 2020 - Human Nature 31 (1):68-87.
    Using psychosocial acceleration theory, this multimethod, multi-reporter study examines how early adversity adaptively shapes the development of a self-regulation construct: effortful control. Investigation of links between early life harshness and unpredictability and the development of effortful control could facilitate a nuanced understanding of early environmental effects on cognitive and social development. Using the Building Strong Families national longitudinal data set, aspects of early environmental harshness and early environmental unpredictability were tested as unique predictors of effortful control at age 3 using (...)
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