Human behavioral ecology (HBE) began as an attempt to explain human economic, reproductive, and social behavior using neodarwinian theory in concert with theory from ecology and economics, and ethnographic methods. HBE has addressed subsistence decision-making, cooperation, life history trade-offs, parental investment, mate choice, and marriage strategies among hunter-gatherers, herders, peasants, and wage earners in rural and urban settings throughout the world. Despite our rich insights into human behavior, HBE has very rarely been used as (...) a tool to help the people with whom we work. This article introduces a special issue of Human Nature which explores the application of HBE to significant world issues through the design and critique of public policy and international development projects. The articles by Tucker, Shenk, Leonetti et al., and Neil were presented at the 104th annual meeting of the American Anthropological Association (AAA) in Washington, D.C., in December 2005, in the first organized session of the nascent Evolutionary Anthropology Section (EAS). We conclude this introduction by summarizing some theoretical challenges to applying HBE, and ways in which evolutionary anthropologists can contribute to solving tough world issues. (shrink)

Behavioral ecology, based in the theory of natural selection, predicts that certain behaviors are likely to differ consistently between the sexes in humans as well as other species: aggression, resource striving, information content of sexual signalling. These differences, though of course open to modification by cultural practice, arise because male and female humans, like males and females of other mammal species, typically optimize their reproductive lifetimes through different behaviors: males specializing in mating effort (which has a high fixed (...) cost, and is not offspring-specific), and females in parental effort (which has more linear reproductive returns, and is offspring-specific). The resulting patterns are reviewed. (shrink)

I attempt to complement my earlier critiques of human sociobiology, by offering an account of how evolutionary ideas might legitimately be employed in the study of human social behavior. The main emphasis of the paper is the need to integrate studies of proximate mechanisms and their ontogenesis with functional/evolutionary research. Human psychological complexity makes it impossible to focus simply on specific types of human behavior and ask for their functional significance. For any of the kinds of (...) behavior patterns that have occupied human sociobiologists, the underlying proximate mechanisms are very likely to be linked to a broad spectrum of types of behavior, and we cannot expect that natural selection will have acted directly on any individual element from this spectrum. I illustrate this general point with a specific example, considering the traditional sociobiological account of human incest-avoidance and outlining an alternative approach to the phenomena. The example is intended to show the possibility of a more rigorous and sophisticated successor to human sociobiology, which I call "human behavioral ecology". (shrink)

This paper discusses problems associated with the use of optimality models in human behavioral ecology. Optimality models are used in both human and non-human animal behavioral ecology to test hypotheses about the conditions generating and maintaining behavioral strategies in populations via natural selection. The way optimality models are currently used in behavioral ecology faces significant problems, which are exacerbated by employing the so-called ‘phenotypic gambit’: that is, the bet that the (...) psychological and inheritance mechanisms responsible for behavioral strategies will be straightforward. I argue that each of several different possible ways we might interpret how optimality models are being used for humans face similar and additional problems. I suggest some ways in which human behavioral ecologists might adjust how they employ optimality models; in particular, I urge the abandonment of the phenotypic gambit in the human case. (shrink)

The transfer of food among group members is a ubiquitous feature of small-scale forager and forager-agricultural populations. The uniqueness of pervasive sharing among humans, especially among unrelated individuals, has led researchers to evaluate numerous hypotheses about the adaptive functions and patterns of sharing in different ecologies. This article attempts to organize available cross-cultural evidence pertaining to several contentious evolutionary models: kin selection, reciprocal altruism, tolerated scrounging, and costly signaling. Debates about the relevance of these models focus primarily on the extent (...) to which individuals exert control over the distribution of foods they acquire, and the extent to which donors receive food or other fitness-enhancing benefits in return for shares given away. Each model can explain some of the variance in sharing patterns within groups, and so generalizations that ignore or deny the importance of any one model may be misleading. Careful multivariate analyses and cross-cultural comparisons of food transfer patterns are therefore necessary tools for assessing aspects of the sexual division of labor, human life history evolution, and the evolution of the family. This article also introduces a framework for better understanding variation in sharing behavior across small-scale traditional societies. I discuss the importance of resource ecology and the degree of coordination in acquisition activities as a key feature that influences sharing behavior. (shrink)

Family planning is the usual modern route to producing a small family. Can human behavioral ecology provide a framework for understanding family planning behavior? Hillard S. Kaplan (Yearb. Phys. Anthropol. 39:91–135) has proposed a general theory of human parental investment based on the importance of skills development in children. As modern, skills-based, competitive market economies are established, parental investment strategies would be predicted to become oriented toward producing increasingly competitive offspring in a pattern of coordinated investment (...) in their embodied capital—in other words, skills training along with good health to ensure their long-term productivity. Parental embodied capital and resources are also expected to be associated with motivation to produce competitive offspring. The basic parental investment trade-off between quality and quantity should predict greater investment in fewer children and the adoption of family planning behavior. Data on family planning in two ethnic groups in Northeast India (Khasi and Bengali) currently experiencing early-phase transition into modern market economies from very different social and ecological baselines are examined within this analytical framework. The results show a mixture of strategies in conjunction with family planning that involve decreased as well as increased investment in the embodied capital of children among Bengali and a divergence of investments in education and health among Khasi. These mixtures of strategies provide some insight into the motivations to use family planning in the face of economic transition, given differing local cultural and ecological conditions and the opportunity structures they provide. (shrink)

Governments and non-govermental organizations (NGOs) that plan projects to conserve the environment and alleviate poverty often attempt to modify rural livelihoods by halting activities they judge to be destructive or inefficient and encouraging alternatives. Project planners typically do so without understanding how rural people themselves judge the value of their activities. When the alternatives planners recommend do not replace the value of banned activities, alternatives are unlikely to be adopted, and local people will refuse to participate. Human behavioral (...) ecology and behavioral economics may provide useful tools for generating and evaluating hypotheses for how people value economic activities in their portfolios and potential alternatives. This is demonstrated with a case example from southwestern Madagascar, where plans to create a Mikea Forest National Park began with the elimination of slash-and-burn maize agriculture and the encouragement to plant labor-intensive manioc instead. Future park plans could restrict access to wild tuber patches, hunting small game, and fishing. The value of these activities is considered using observational data informed by optimal foraging theory, and experimental data describing people’s time preference and covariation perception. Analyses suggest that manioc is not a suitable replacement for maize for many Mikea because the two crops differ in terms of labor requirements, delay-to-reward, and covariation with rainfall. Park planners should promote wild tuber foraging and stewardship of tuber patches and the anthropogenic landscapes in which they are found. To conserve small game, planners must provide alternative sources of protein and cash. Little effort should be spent protecting lemurs, as they are rarely eaten and never sold. (shrink)

A common exhortation by conservationists suggests that we can solve ecological problems by returning to the attitudes of traditional societies: reverence for resources, and willingness to assume short-term individual costs for long-term, group-beneficial sustainable management. This paper uses the 186-society Standard Cross-Cultural Sample to examine resource attitudes and practices. Two main findings emerge: (1) resource practices are ecologically driven and do not appear to correlate with attitude (including sacred prohibition) and (2) the low ecological impact of many traditional societies results (...) not from conscious conservation efforts, but from various combinations of low population density, inefficient extraction technology, and lack of profitable markets for extracted resources. (shrink)

We propose a general framework for integrating theory and empiricism in human evolutionary ecology. We specifically emphasize the joint use of stochastic nonlinear dynamics and information theory. To illustrate critical ideas associated with historical contingency and complex dynamics, we review recent research on social preferences and social learning from behavioral economics. We additionally examine recent work on ecological approaches in history, the modeling of chaotic populations, and statistical application of information theory.

Ecological weed management is a scientifically established management approach that uses ecological patterns to reduce weed seedbanks. Such an approach can save organic farmers time and labor costs and reduce the need for repeated cultivation practices that may pose risks to soil and water quality. However, adoption of effective EWM in the organic farm community is perceived to be poor. In addition, communication and collaboration between the scientific community, extension services, and the organic farming community in the US is historically (...) weak. In order to uncover the most persistent obstacles to promoting effective weed management in organic agroecosystems, we use the mental models approach to generate an expert model based on interviews with experts and theories from the behavioral sciences. The expert model provides two main insights: EWM is a complex strategy that may cause farmers to use heuristics in management decisions and the long-term benefits of EWM, rather than the risks, need to be emphasized in communication with and outreach to organic farmers. The basis for new research topics and outreach material that incorporates these insights from the expert model are discussed. We briefly explain how the expert model is an incomplete picture of on-farm practices, but provides the basis for the second step of our mental models research, the farmer interviews and farmer decision model development. (shrink)

Drawing from two strands of ecological psychology, we suggest that even if social robots are interactive depictions, people need not mentally represent them as such. Rather, people can engage with the opportunities for action or affordances that social robots offer to them. These affordances are constrained by the larger sociocultural settings within which human–robot interactions occur.

This article reviews the effects of malnutrition on early brain development using data generated from animal experiments and human clinical studies. Three related processes, each with their own functional consequences, are implicated in the alteration of brain development. (1) Maternal undernutrition at the start of pregnancy results in reduced transfer of nutrients across the placenta, allowing the conservation of effort for future reproductive episodes. (2) Differential allocation to growing organs by the fetus in response to nutritional stress spares the (...) brain to a large though still limited degree, reflecting the organ’s relative contribution to survival and reproductive success. (3) Prenatal malnutrition disrupts developing neurotransmitter systems, which results in the expression of specific cognitive and affective traits. It is argued that the increasing size and therefore cost of the brain, in conjunction with increasing ecological instability and marginality, reinforced selection for maternally controlled growth suppression of offspring, reallocation of organ growth rates by offspring, and behavioral changes related to development of neurotransmitter systems. (shrink)

The nervous system and the endocrine system interact to integrate behavior and physiolo­gy. Hormones play an important role in this interaction, particularly steroid hormones. Other molecules, notably oxytocin, can serve both as hormones in the soma and neuro­modulators in the central nervous system. Understanding the influence of the endocrine system on human behavior, both individual and social, has been a primary focus of behav­ioral endocrinology for many decades, though technical and methodological challenges have been formidable. The recent enthusiasm for (...) enzyme-linked immunoassay kits for measuring steroid hormones in saliva has been found to be largely unsound, for example. Despite these difficulties, advances in many areas have been made and new areas, such as the endocrinology of paternal behavior and the role of oxytocin in social interactions, have emerged. Reproductive ecology provides a theoretical framework for integrating the di­verse content of human behavioral ecology. (shrink)

In this chapter, we analyze the relationships between the Internet and its users in terms of situated cognition theory. We first argue that the Internet is a new kind of cognitive ecology, providing almost constant access to a vast amount of digital information that is increasingly more integrated into our cognitive routines. We then briefly introduce situated cognition theory and its species of embedded, embodied, extended, distributed and collective cognition. Having thus set the stage, we begin by taking an (...) embedded cognition view and analyze how the Internet aids certain cognitive tasks. After that, we conceptualize how the Internet enables new kinds of embodied interaction, extends certain aspects of our embodiment, and examine how wearable technologies that monitor physiological, behavioral and contextual states transform the embodied self. On the basis of the degree of cognitive integration between a user and Internet resource, we then look at how and when the Internet extends our cognitive processes. We end this chapter with a discussion of distributed and collective cognition as facilitated by the Internet. (shrink)

The evolutionary origin of human pair-bonds is uncertain. One hypothesis, supported by data from forgers, suggests that pair-bonds function to provision mothers and dependent offspring during lactation. Similarly, public health data from large-scale industrial societies indicate that single mothers tend to wean their children earlier than do women living with a mate. Here we examine relations between pair-bond stability, alloparenting, and cross-cultural trends in breastfeeding using data from 58 “traditional” societies in the Standard Cross-Cultural Sample (SCCS). Analyses show that (...) stable conjugal relationships were associated with significantly later weaning among the societies in the SCCS. The relationship between pair-bond stability and age at weaning was not mediated by women’s ability to provision themselves or women’s kin support. Availability of alloparental care was also inversely related to age at weaning, and the association was not significantly reduced after controlling for frequency of divorce. This study indicates that among a woman’s kin relationships, a pair-bond with a child’s father is especially supportive of breastfeeding. These cross-cultural findings are further evidence that human pair-bonds may have evolved to support lactation. (shrink)

. Undoubtedly, multinational corporations must play a significant role in the advancement of global ecological ethics. Our research offers a glimpse into the process of how goals of ecological sustainability in one multinational corporation can trickle down through the organization via the sustainability support behaviors of supervisors. We asked the question “How do supervisors in a multinational corporation internalize their corporation’s commitment to ecological sustainability and, in turn, behave in ways that convey this commitment to their subordinates?” In response, we (...) created a theoretical framework for supervisor sustainability support behavior based on Stern et al., Human Ecology Review 6(2), 81-97 (1999) value-belief-norm (VBN) theory. We then tested our framework by performing a survey-based field study of supervisors in a multinational pharmaceutical company that has publicly professed a goal of ecological sustainability. (shrink)

Environment is essentially in the category of culture and environmental research should be based on human value and culture. The study of the relationship between humans and their natural environment should also refer to human relations. Since the operational logic of social capital is the root of ecological crisis, the ultimate solution to this problem lies in human’s correct thinking, institutional, political and behavioral patterns in dealing with nature. Re-establishing human ecology therefore provides a (...) cultural basis for the harmony between human and nature and realistic basis for the psycho-physical harmony and spiritualization of humans. (shrink)

Studies of the association between wealth and fertility in industrial populations have a rich history in the evolutionary literature, and they have been used to argue both for and against a behavioral ecological approach to explaining human variability. We consider that there are strong arguments in favor of measuring fertility (and proxies thereof) in industrial populations, not least because of the wide availability of large-scale secondary databases. Such data sources bring challenges as well as advantages, however. The purpose (...) of this article is to illustrate these by examining the association between wealth and reproductive success in the United States, using the National Longitudinal Study of Youth 1979. We conduct a broad-based exploratory analysis of the relationship between wealth and fertility, employing both cross-sectional and longitudinal approaches, and multiple measures of both wealth (income and net worth) and fertility (lifetime reproductive success and transitions to first, second and third births). We highlight the kinds of decisions that have to be made regarding sample selection, along with the selection and construction of explanatory variables and control measures. Based on our analyses, we find a positive effect of both income and net worth on fertility for men, which is more pronounced for white men and for transitions to first and second births. Income tends to have a negative effect on fertility for women, while net worth is more likely to positively predict fertility. Different reproductive strategies among different groups within the same population highlight the complexity of the reproductive ecology of industrial societies. These results differ in a number of respects from other analyses using the same database. We suggest this reflects the impossibility of producing a definitive analysis, rather than a failure to identify the “correct” analytical strategy. Finally, we discuss how these findings inform us about (mal)adaptive decision-making. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Ecological Suffering:From a Buddhist PerspectiveSulak Sivaraksa“There will be great suffering caused by our human-created climate change, but we may need to go through this process in order to see the ‘light.’”—Nigel Crawhall (IUCN, CEESP representative, South Africa)Ecological suffering is the result of centuries of abuse of our Earth and environment. It is the effects of numerous overlapping developments that are unsustainable for the most part. It results from (...) violent actions, whether in the shape of colonialism, industrial development, wars, economic growth, the arms race, or capitalist competition between states. More importantly, it is a flaw inherent in the global capitalist system—which is nevertheless seen as the best system to organize human life—and will bring down both capitalism and human survival if we act as if we don’t know about it. I explicitly name capitalism because without doing so any critique will be simply abstract, moralistic, and toothless—such as blaming greed in general or on particular greedy individuals, on human nature, on civilization, and so on. No. Ecological suffering is the result of systemic violence rooted in the global political economy. Although our world cherishes diversity and choice, it is increasingly intolerant of any form of living that resists free market fundamentalism. Ecological suffering is happening on a daily level even if we feel that nothing is happening. Ecological suffering sustains the normalcy of our everyday life as we drive to work, eat our lunch, talk on our mobile phones, connect to the Internet, and so on. It is woven into our daily existence. As such, we don’t want our daily life to be disturbed and often act as if we don’t know about ecological suffering. But it is also experienced unevenly: the poor majority more so than the rich minority, who for now could still buy their way out of the problem; developing societies more than developed ones; and so on.One thing is certain: Our ecosystem is crashing. What should be a circle of life, of interconnected life forms, has already started to work as individual parts going in different directions, leading to malfunctions and negative consequences in many parts [End Page 147] of the system. At the Inter-Religious Dialogue on Climate Change and Biodiversity Conservation in September 2012, a conclusion that was arrived at the conference was a simple but profound one: It is all connected; we are all connected. As I mentioned in my latest book, Wisdom of Sustainability,1 our world and nature works in the same way as the wheel of Dhamma. The wheel of Dhamma can be used to countenance the wheels of state and systemic violence. This is why tackling the environmental problem needs a religious or spiritual dimension.Below, I will reflect on the problems and challenges we face in coping with the impending ecological catastrophe. I link the postponement of the crisis and sustainability with the cultivation of spirituality in ourselves—that is, to search for what has been uprooted and what we need to reclaim or retrieve. Bringing in Buddhist ethics, I will tease out how an interfaith approach to problem solving can benefit our environment by pointing to some concrete suggestions.The starting points of this talk are drawn from The Wisdom of Sustainability and the conference overview of the Inter-Religious Dialogue on Climate Change and Biodiversity Conservation, and I will alternate between these two points, which also structure my talk. The dialogue was held in Sri Lanka in September 2012, at the Islander Center. It was organized by the International Network of Engaged Buddhists (INEB), the Sewalanka Foundation, International Union for the Conservation of Nature (IUCN) Sri Lanka National Office, and Commission on Environmental Economic and Social Policy (CEESP). At this conference faith leaders, environmental and climate scientists, conservationists, and social activists from all over the world gathered to collaboratively explore the scientific foundations of climate change and biodiversity loss; its social, political, and economic drivers; the impacts of climate change on human societies and the environment; and the underlying human behaviors that contribute to climate change.2The conference used three levels of engagement to frame the creation of a roadmap for action... (shrink)

The disagreement between philosophers about the scientific worth of the evolutionary behavioral sciences (evolutionary psychology, human behavioral ecology, etc.) is in part due to the fact that critics and advocates of these sciences characterize them very differently. In this article, by analyzing quantitatively the citations made in the articles published in Evolution & Human Behavior between January 2000 and December 2002, we provide some evidence that undermines the characterization of the evolutionary behavioral sciences put (...) forward by their critics. (shrink)

Benenson et al. postulate that human females evolved unique survival adaptations to facilitate maternal and grandmaternal care. This hypothesis is consistent with the broader hypothesis that female phenotypes are more ecologically optimal, but further evidence is needed to make a compelling case that sex differences in self-protection are not primarily the result of more intense sexual selection on males.

In this special issue of Human Nature we explore the possible adaptive links between teaching and learning during childhood, and we aim to expand the dialogue on the ways in which the social sciences, and in particular current anthropological research, may better inform our shifting understanding of how these processes vary in different social and ecological environments. Despite the cross-disciplinary trend toward incorporating more behavioral and cognitive data outside of postindustrial state societies, much of the published cross-cultural data (...) is presented as stand-alone population-level studies, making it challenging to extrapolate trends or incorporate both ecological and developmental perspectives. Here, contributors explore how human life history, ecological experience, cumulative culture, and ethnolinguistics impact social learning and child development in foraging and transitioning societies around the world. Using historical ethnographic data and qualitative and quantitative data from studies with contemporary populations, authors interrogate the array of factors that likely interact with cognitive development and learning. They provide contributions that explore the unique environmental, social, and cultural conditions that characterize such populations, offering key insights into processes of social learning, adaptive learning responses, and culture change. This series of articles demonstrates that children are taught culturally and environmentally salient skills in myriad ways, ranging from institutionalized instruction to brief, nuanced, and indirect instruction. Our hope is that this collection stimulates more research on the evolutionary and developmental implications associated with teaching and learning among humans. (shrink)

There are inconsistencies in the treatment and attitudes of human beings to animals and much confusion in thinking about what are appropriate conditions for using and keeping animals. This article outlines some of these considerations and then proposes guidelines for designing animal management systems. In the first place, the global and local ecological effects of all animal management systems must be considered and an environment designed that will not rock the biospherical boat. The main points to consider are the (...) interrelatedness of living things with each other and the environment, the self-sustaining nature of ecosystems, and the importance of diversity in the stability and maintenance of ecosystems. These can and should be taken into account when assessing animal management. They are illustrated by examples of companion/urban dogs, as well as farm, zoo, and circus animals. The environment must also be considered from the point of view of the ethological needs of the animals. There are two possible approaches to this: (1) the reductionist approach, illustrated by the choice experimental tests; and (2) a holistic, evolutionist approach that concentrates on the degree of behavioral restriction and the identification of distress. The assessment of an animal's ethological needs, and thus the ethological soundness of an environment, must take into account the species needs (communication system, species-specific characteristics of the brain receptors and cognition) and the individual's needs (his past experience). The behavioral effects of domestication and how distress can be assessed are discussed. Different ethical positions toward animals and their treatment are briefly outlined, and it is argued that, provided animals are in ecologically and ethologically sound environments, their use by human beings is ethically acceptable. The animal-human association should be characterized by symbiosis—mutual benefit—rather than a parasitic or exploitative relationship—employer to employee, rather than master to slave. (shrink)

Here I outline the argument in Kim Sterelny’s book The Evolved Apprentice. I present some worries for Sterelny from the perspective of modelers in behavioral ecology. I go on to discuss Sterelny’s approach to moral psychology and finally introduce some potential new applications for his evolved apprentice view.

We emphasize the value of the socio-ecological approach in addressing the problem of population variances. The socio-ecological perspective studies how social and natural habitats shape human behaviors, and are in turn shaped by those behaviors. This focus on system-level factors is particularly well-suited to studying the origins of group differences in human behavior.

Novel ecosystems represent the challenge of the Anthropocene epoch on a local scale. In an age where human agency is the defining ecological factor, ecological discourse and practice finds itself in its own “non-analog” conditions. In this context, good work can be an important place for developing answers to these questions. The fields of ecological practice, such as restoration and management, with their characteristic orientation toward objectives, lack a substantive understanding of what good work entails. Consequently, these fields are (...) unable to articulate what distinguishes moral and immoral human interventions in the nonhuman world and they turn instead to ambiguous categories such as “natural,” “historic,” and “pre-disturbance” for benchmarks. In contrast, a substantive conception of good work can name and clarify the sorts of intentions and behaviors that characterize positive human intervention in ecosystems, rather than simply rejecting those that are apparently “unnatural” or “novel.” From a phenomenological perspective, good ecological work demands accountability not only for the kinds of ecosystems we create or restore, but ultimately for the meanings we construct for our world and for ourselves. (shrink)

In modern Indian political discourse the custom of dowry is often represented as the cause of serious social problems, including the neglect of daughters, sex-selective abortion, female infanticide, and the harassment, abuse, and murder of brides. Attempts to deal with these problems through legislative prohibition of dowry, however, have resulted in virtually no diminution of either dowry or violence against women. In contrast, radically different interpretations of dowry can be found in the literatures of structural-functionalist anthropology, economics, and human (...) behavioral ecology which muster wide-ranging forms of qualitative and quantitative evidence to support functional models of dowry as a form of inheritance or investment in daughters and/or their children. This paper argues that a functionalist perspective on dowry could lead to improved dowry policy, and that an approach based in human behavioral ecology (HBE) is uniquely suited to this task. After reviewing the relevant literature on dowry in South Asia, I discuss current dowry legislation and its limitations. I then develop a behavioral ecology model of Indian dowry and test it with quantitative and qualitative data. I conclude that if dowry legislation is to achieve broad support or bring about effective social change, it must address and support the positive motivations for and effects of dowry and take a targeted approach to dowry violence, which is not uniformly distributed across regions, castes, or social classes. (shrink)

Health research has shown that overweight and obesity in children and adults are becoming significant public health problems in the developing world. Evidence suggests that this phenomenon is more marked in urban than rural areas and may be associated with modernization. However, the underlying reasons for this nutrition transition remain unclear. Dietary shifts, often in conjunction with income and time constraints in urban environments, may entail a greater reliance on more convenient sugar and fat-dense food. Also, the necessity of labor-intensive (...) agricultural work to meet rural subsistence needs is supplanted in urban environments by sedentary work. This paper extends the application of human behavioral ecology theory into the realm of international development and policy by applying Kaplan’s embodied capital theory to explore differences in food habits and nutritional status of Indo-Fijian children within the context of urbanization. Urban high-embodied-capital women demonstrate higher rates of wage-earning employment than urban low-embodied-capital or rural women. Findings indicate that urban high-embodied-capital households spend significantly more on food purchases, purchase a greater proportion of processed foods, and have children with higher body mass indexes (BMI) than do urban low-embodied-capital or rural households. This suggests that urban high-embodied-capital mothers, who tend to be employed, may be making trade-offs between income and food choices. (shrink)

We propose a way to achieve across-population sharing within the authors' model in a way that is plausibly in accordance with human evolution, and also a simple way to capture ecological structure. Finally, we briefly reflect on the model's scope and limits in modeling linguistic communication.

Competition for resources is one of the main evolutionary explanations for dispersal from the natal area. For humans this explanation has received little attention, despite the key role dispersal is thought to play in shaping social systems. I examine the link between dispersal and resources using historical data on people from the small farming town of Oakham, Massachusetts (1750–1850). I reconstruct individual life histories through a variety of records, identifying dispersers, their age at dispersal, and their destinations. I find that (...) sex, father’s wealth and social status, and age at father’s death were all significantly associated with one or more dispersal variables. Birth order and number of siblings were not significantly associated with any of the dispersal variables. I also use wills and deeds to study transfers of land from fathers to sons. More stayers than dispersers acquired Oakham land from their fathers, but some sons who acquired Oakham land later dispersed. I discuss the causality underlying the relationship between dispersal and resource acquisition, as well as implications for a general understanding of human dispersal. (shrink)

To the evolutionarily oriented clinical psychiatrist, the discipline of behavioural ecology is a fertile basic science. Human psychology discusses variation in terms of means, standard deviations, heritabilities, and so on, but behavioural ecology deals with mutually incompatible alternative behavioural strategies, the heritable variation being maintained by negative frequency-dependent selection. I suggest that behavioural ecology should be included in the interdisciplinary dialogue recommended by Keller & Miller (K&M). (Published Online November 9 2006).

It has been well documented, and fairly well known, that concomitant with an increase in chronological age is a corresponding increase in sensory impairment. As most people realize, our hearing suffers as we get older; hence, the increased need for hearing aids. The first portion of the present paper is how the change in age apparently affects auditory judgments of sound source position. A summary of the literature evaluating the changes in the perception of sound source location and the perception (...) of sound source motion as a function of chronological age is presented. The review is limited to empirical studies with behavioral findings involving humans. It is the view of the author that we have an immensely limited understanding of how chronological age affects perception of space when based on sound. In the latter part of the paper, discussion is given to how auditory spatial perception is traditionally conducted in the laboratory. Theoretically, beneficial reasons exist for conducting research in the manner it has been. Nonetheless, from an ecological perspective, the vast majority of previous research can be considered unnatural and greatly lacking in ecological validity. Suggestions for an alternative and more ecologically valid approach to the investigation of auditory spatial perception are proposed. It is believed an ecological approach to auditory spatial perception will enhance our understanding of the extent to which individuals perceive sound source location and how those perceptual judgments change with an increase in chronological age. (shrink)

Previous studies have shown that people often use heuristics in making inferences and that subjective memory experiences, such as recognition or familiarity of objects, can be valid cues for inferences. So far, many researchers have used the binary choice task in which two objects are presented as alternatives (e.g., “Which city has the larger population, city A or city B?”). However, objects can be presented not only as alternatives but also in a question (e.g., “Which country is city X in, (...) country A or country B?”). In such a situation, people can make inferences based on the relationship between the object in the question and each object given as an alternative. In the present study, we call this type of task a “relationships‐comparison task.” We modeled the three inference strategies that people could apply to solve it (familiarity‐matching [FM; a new heuristic we propose in this study], familiarity heuristic [FH], and knowledge‐based inference [KI]) to examine people's inference processes. Through Studies 1, 2, and 3, we found that (a) people tended to rely on heuristics, and that FM (inferences based on similarity in familiarity between objects) well explained participants' inference patterns; (b) FM could work as an ecologically rational strategy for the relationships–comparison task since it could effectively reflect environmental structures, and that the use of FM could be highly replicable and robust; and (c) people could sometimes use a decision strategy like FM, even in their daily lives (consumer behaviors). The nature of the relationships–comparison task and human cognitive processes is discussed. (shrink)

Agro-ecological innovations aim at promoting sustainable agricultural practices that have long term benefits. However, farmers rarely adopt beneficial innovations in agro-ecology despite expressing an understanding of the benefits and a desire to do so. It has been argued that the farmers lack sufficient knowledge to implement complex innovations. We believe that in many cases such knowledge is necessary, but is ultimately insufficient for complex innovation adoption. We argue that in addition to knowledge and a desire to adopt an innovation, (...) many farmers require a collaborative relation with an ally. We call this method the Alliance Approach to innovation. This approach is modeled after the therapeutic Alliance Approach at work in cognitive and behavioral sciences. We argue that using the Alliance Approach will not only prove effective in helping farmers adopt complex agro-ecology innovations, but also a better fit for the human centered development of capability approach human development, as it is likely to enhance both the well-being and agency of the farmers. (shrink)

BackgroundIt is becoming increasingly apparent that the COVID-19 pandemic not only poses risks to physical health, but that it also might lead to a global mental health crisis, making the exploration of protective factors for mental well-being highly relevant. The present study seeks to investigate religious/spiritual well-being as a potential protective factor with regard to psychiatric symptom burden and addictive behavior.Materials and MethodsThe data was collected by conducting an online survey in the interim period between two national lockdowns with young (...) adults in Austria. The primary study variables were assessed through the Brief Symptom Inventory 18, the Alcohol, Smoking and Substance Involvement Screening Test and the Multidimensional Inventory for Religious/Spiritual Well-Being short version, with its sub-dimensions Hope, Forgiveness, General Religiosity, and Connectedness.ResultsWe observed HO and FO as substantial negative predictors of psychiatric symptom burden. With regard to addictive behavior, HO in particular but also GR seem to have a protective function. Furthermore, we found positive connections between CO, psychiatric symptom burden, and addictive behavior.ConclusionIn line with our assumptions, HO, FO and to a minor extent GR were confirmed as negative predictors regarding psychiatric symptom burden or addictive behavior in young adults, coping with the psychological threat of COVID-19 pandemic. These dimensions might be further considered as potential resources in clinical treatment. However, the positive prediction of mental illness parameters by increased feelings of CO could also be interpreted as an expression of exhaustion and alienation from the real world. (shrink)

De Dreu and Gross offer a compelling synthesis of a growing literature on the psychology of attack and defense. I argue that human raiding ecology suggests the need to endogenize attacker-defender move order as well as opportunities for tactical mismatch available to defenders. Perhaps most significantly, I draw attention to the surprising lacunae in sex differences across attack and defense.

Agriculture has long struggled to reconcile production with biodiversity conservation. Industrial farming practices that erode structural complexity within crop fields and across entire landscapes, as well as widespread pesticide use, have resulted in declining insect abundance and diversity globally. Recognition of socio-environmental consequences have spurred alternative pest management paradigms such as integrated pest management (IPM) and conservation biological control (CBC), which emphasize ecology as the scientific foundation for a sustainable agriculture. However, adoption of these approaches at scales large enough (...) to impact biodiversity has been slow, particularly in industrialized countries. Landscape-scale management is an integral component of ecological agriculture, making pest control and biodiversity conservation collective problems that require coordination among multiple stakeholders. The extent to which farmers recognize and act upon this perspective is not well studied. Through literature synthesis and a case study of Southern Wisconsin, I analyze factors shaping farmer adoption of insect and landscape management practices through the lens of constrained choice. I argue that multiple overlapping institutions (social networks, market forces, science and technology, and political-legal systems) co-produce farmer behaviors and landscape structure, largely to the detriment of ecological pest control and biodiversity. Wisconsin farmers' entomological concerns largely overlook beneficial insect species and eschew landscape thinking. Ultimately, slowing agricultural drivers of insect biodiversity declines will likely require large-scale coordination and political-economic change. (shrink)

Life history theory’s principle of allocation suggests that because immature organisms cannot expend reproductive effort, the major trade-off facing juveniles will be the one between survival, on one hand, and growth and development, on the other. As a consequence, infants and children might be expected to possess psychobiological mechanisms for optimizing this trade-off. The main argument of this paper is that the attachment process serves this function and that individual differences in attachment organization (secure, insecure, and possibly others) may represent (...) facultative adaptations to conditions of risk and uncertainty that were probably recurrent in the environment of human evolutionary adaptedness. (shrink)

Is fertility relevant to evolutionary analyses conducted in modern industrial societies? This question has been the subject of a highly contentious debate, beginning in the late 1980s and continuing to this day. Researchers in both evolutionary and social sciences have argued that the measurement of fitness-related traits (e.g., fertility) offers little insight into evolutionary processes, on the grounds that modern industrial environments differ so greatly from those of our ancestral past that our behavior can no longer be expected to be (...) adaptive. In contrast, we argue that fertility measurements in industrial society are essential for a complete evolutionary analysis: in particular, such data can provide evidence for any putative adaptive mismatch between ancestral environments and those of the present day, and they can provide insight into the selection pressures currently operating on contemporary populations. Having made this positive case, we then go on to discuss some challenges of fertility-related analyses among industrialized populations, particularly those that involve large-scale databases. These include “researcher degrees of freedom” (i.e., the choices made about which variables to analyze and how) and the different biases that may exist in such data. Despite these concerns, large datasets from multiple populations represent an excellent opportunity to test evolutionary hypotheses in great detail, enriching the evolutionary understanding of human behavior. (shrink)

The phenomenon of base-rate neglect has elicited much debate. One arena of debate concerns how people make judgments under conditions of uncertainty. Another more controversial arena concerns human rationality. In this target article, we attempt to unpack the perspectives in the literature on both kinds of issues and evaluate their ability to explain existing data and their conceptual coherence. From this evaluation we conclude that the best account of the data should be framed in terms of a dual-process model (...) of judgment, which attributes base-rate neglect to associative judgment strategies that fail to adequately represent the set structure of the problem. Base-rate neglect is reduced when problems are presented in a format that affords accurate representation in terms of nested sets of individuals. (shrink)

Evolution of Human Behavior is the first text to synthesize and compare the major proposals for human behavioral evolution from an anthropological perspective. Ideal for courses in the evolution of human behavior, human evolutionary ecology, evolutionary psychology, and biological anthropology, this unique volume reviews a wide array of approaches on how and why humans evolved behaviorally.

A popular goal in psychological science is to understand human cognition and behavior in the ‘real world’. In contrast, researchers have typically conducted their research in experimental research settings, a.k.a. the ‘psychologist’s laboratory’. Critics have often questioned whether psychology’s laboratory experiments permit generalizable results. This is known as the ‘real-world or the lab’-dilemma. To bridge the gap between lab and life, the concept of ecological validity has been widely used to evaluate whether laboratory experiments resemble and generalize to the (...) ‘real world’. However, researchers seldom define what they mean with this concept, nor are there any guidelines or criteria available for evaluating a study’s ecological validity. In our view, the popular concept of ecological validity is ill-formed, lacks specificity, and falls short of adequately addressing the fundamental problem of generalizability. In order to move beyond this ‘real-world or the lab’-dilemma, we believe that researchers should be more specific about the contexts of behaviors they are interested in, instead of aiming to understand human cognition and behavior in the ‘real world’. We argue that this is a more constructive way of uncovering the context-specific and context-generic principles of human cognition and behavior. (shrink)

This article discusses various dangers that accompany the supposedly benign methods in behavioral evoltutionary biology and evolutionary psychology that fall under the framework of "methodological adaptationism." A "Logic of Research Questions" is proposed that aids in clarifying the reasoning problems that arise due to the framework under critique. The live, and widely practiced, " evolutionary factors" framework is offered as the key comparison and alternative. The article goes beyond the traditional critique of Stephen Jay Gould and Richard C. Lewontin, (...) to present problems such as the disappearance of evidence, the mishandling of the null hypothesis, and failures in scientific reasoning, exemplified by a case from human behavioral ecology. In conclusion the paper shows that "methodological adaptationism" does not deserve its benign reputation. (shrink)

In this paper I consider the notion of “moral ecology” in relation to the social/cultural construction known as “narco-culture.” My claim is that the moral ecology of narco-culture is one that is both destructive and prohibitive of human flourishing. The general idea of a “moral ecology” is that the moral space of human conviviality is not unlike an ecological, or environmental, space—both are constituted by various interdependent relations which, when working harmoniously and in optimal capacity, (...) maintain the overall well-being of its inhabitants. Within non-human ecosystems, the quality or health of rivers, trees, earth, air, predator-prey relationships, etc., define what Allen Hertzke calls the system’s “carrying capacity.” The carrying capacity refers to what the system can handle while staying balanced and healthy and also indicates the point beyond which the system, if overburdened or degraded, begins to fall apart. In a social setting, the ecology is constituted by moral rules and behaviors, the degradation of which can cause the degradation of the entire system. (shrink)

Much clinical and ethnographic evidence suggests that humans, like many other organisms, are selected to avoid close inbreeding because of the fitness costs of inbreeding depression. The proximate mechanism of human inbreeding avoidance seems to be precultural, and to involve the interaction of genetic predispositions and environmental conditions. As first suggested by E. Westermarck, and supported by evidence from Israeli kibbutzim, Chinese sim-pua marriage, and much convergent ethnographic and clinical evidence, humans negatively imprint on intimate associates during a critical (...) period of early childhood.There is also much evidence that, like other social animals, humans do not seek to maximize outbreeding, but rather to maintain an optimal balance between outbreeding and inbreeding.Closeinbreeding reduces fitness through inbreeding depression, butsomeinbreeding brings the benefits of nepotism. For simple, stateless, horticultural societies, the optimal balance seems to be achieved by a combination of precultural inbreeding avoidance of relatives with anr≤·25 and cultural rules of preferential marriage with kin withr≥·25. Adjustment of the coefficient of inbreeding to other ecological settings seems to be largely cultural. An interactive model of “culture in nature” is presented, in which culture is seen as coevolving with genes to produce the maxiniization of individual inclusive fitness. (shrink)