BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Center for Behavior, Evolution, and Culture - ECPv6.15.20//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Center for Behavior, Evolution, and Culture X-ORIGINAL-URL:https://bec.ucla.edu X-WR-CALDESC:Events for Center for Behavior, Evolution, and Culture REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:America/Los_Angeles BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20070311T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20071104T090000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20080309T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20081102T090000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20090308T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20091101T090000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:20100314T100000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:20101107T090000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20090223T000000 DTEND;TZID=America/Los_Angeles:20090223T000000 DTSTAMP:20260504T190750 CREATED:20200922T214327Z LAST-MODIFIED:20201013T004831Z UID:4093-1235347200-1235347200@bec.ucla.edu SUMMARY:Daniel Nettle - Why is the Theory of Evolution So Hard to Understand? DESCRIPTION:Daniel Nettle: Newcastle University Centre for Behaviour and EvolutionEven in the most developed countries\, many people do not accept the theory of evolution as true. Whilst there are cultural and ideological reasons for this\, part of the issue is that evolutionary ideas appear to violate certain intuitive beliefs. Even more interestingly\, recent research has shown that students who do accept evolution quite systematically misunderstand how it works\, tending to endorse species selectionism\, the idea that species are born and die abruptly\, and models of heredity in which useful characteristics are acquired by all members of the species\, not just the progeny of the individuals in which they arise. I will argue that all of these errors arise because in our intuitive cognition about animals\, there is little distinction between the species and the individual. Indeed\, species are seen as a kind of individual\, and individual animals are seen as appearances of the underlying species. This leads people into what Ernst Mayr called typological\, rather than population\, thinking. I report results of a recent study of conceptualisation of evolutionary change amongst undergraduate students\, and argue that a good way of conveying evolutionary ideas is by using human examples\, since our intuitive cognition about humans primarily works at the level of individuals\, their family relationships\, and the ways they are different from other members of their species. URL:https://bec.ucla.edu/event/daniel-nettle-why-is-the-theory-of-evolution-so-hard-to-understand/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20090217T000000 DTEND;TZID=America/Los_Angeles:20090217T000000 DTSTAMP:20260504T190750 CREATED:20200922T214326Z LAST-MODIFIED:20201013T004831Z UID:4092-1234828800-1234828800@bec.ucla.edu SUMMARY:David Sloan Wilson - Evolving the City: Using Evolutionary Theory to Understand and Improve the Quality of Everyday Life DESCRIPTION:David Sloan Wilson: SUNY Binghamton Department of Biological\nSciences & Department of AnthropologyEvolutionary theory is rapidly expanding beyond the biological sciences to include all human-related subjects in academia. Since evolution is fundamentally about organisms in relation to their environment\, basic scientific research needs to focus on people from all walks of life\, as they go about their daily lives. This kind of research is also most relevant for improving the quality of everyday life\, leading to a positive tradeoff between basic and applied science. I will provide an overview of The Binghamton Neighborhood Project\, a unique “whole university/whole city” approach to community-based research from an evolutionary perspective. URL:https://bec.ucla.edu/event/david-sloan-wilson-evolving-the-city-using-evolutionary-theory-to-understand-and-improve-the-quality-of-everyday-life/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20090209T000000 DTEND;TZID=America/Los_Angeles:20090209T000000 DTSTAMP:20260504T190750 CREATED:20200922T214324Z LAST-MODIFIED:20201013T004832Z UID:4091-1234137600-1234137600@bec.ucla.edu SUMMARY:Robert Boyd - The Evolution of Social Stratification DESCRIPTION:Robert Boyd: UCLA Department of AnthropologyIn this talk I explain how culturally heritable differences in wealth between social groups can arise and be maintained even when the only adaptive learning process driving cultural evolution increases individuals’ economic gains. The key assumptions are that human populations are structured into groups and that cultural learning is more likely to occur within groups than between groups. Then\, if groups are sufficiently isolated and there are potential gains from specialization and exchange\, stable stratification can sometimes result. This model predicts that stratification is favored by (1) greater surplus production\, (2) more equitable divisions of the surplus among specialists\, (3) greater cultural isolation among subpopulations within a society\, and (4) more weight given to economic success by cultural learners. I will conclude by arguing that this mechanism may explain why there is much more heritable variation among groups within the human species than in other taxa.http://www.sscnet.ucla.edu/anthro/faculty/boyd/HenrichBoydCA0908.pdf URL:https://bec.ucla.edu/event/robert-boyd-the-evolution-of-social-stratification/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20090202T000000 DTEND;TZID=America/Los_Angeles:20090202T000000 DTSTAMP:20260504T190750 CREATED:20200922T214322Z LAST-MODIFIED:20201013T004832Z UID:4090-1233532800-1233532800@bec.ucla.edu SUMMARY:Nathan Bailey - Same-sex Mating Behavior and Evolution DESCRIPTION:Nathan Bailey: UC Riverside Department of BiologySame-sex mating behavior has been extensively documented in non-human animals\, but we still know relatively little about its evolutionary impact. What evidence exists that same-sex sexual behavior can be adaptive? Do the genetic and physiological mechanisms underlying same-sex mating help explain its ultimate cause and maintenance in populations? How flexible is it\, and what is the significance of that plasticity? And can same-sex mating interactions influence the evolutionary dynamics of populations? My talk will draw upon studies published in the last several years in a wide variety of non-human animals to highlight discoveries addressing the role of same-sex sexual behaviors as agents of evolutionary change. I will focus on both the evolutionary causes and consequences of same-sex mating behavior. However\, the bulk of the discussion will be organized around the second theme\, because recent studies suggest that the impact of same-sex mating behavior on population-level processes can be powerful and of considerable importance. URL:https://bec.ucla.edu/event/nathan-bailey-same-sex-mating-behavior-and-evolution/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20090126T000000 DTEND;TZID=America/Los_Angeles:20090126T000000 DTSTAMP:20260504T190750 CREATED:20200922T214321Z LAST-MODIFIED:20201013T004832Z UID:4089-1232928000-1232928000@bec.ucla.edu SUMMARY:James Fowler - Genes and Social Networks DESCRIPTION:James Fowler: UCSD Political Science DepartmentSocial networks exhibit strikingly systematic patterns across a wide range of human contexts. While genetic variation accounts for a significant portion of the variation in many complex social behaviors\, the heritability of egocentric social network attributes is unknown. Here we show that three of these attributes (in-degree\, transitivity\, and centrality) are heritable. We then develop a “mirror network” method to test extant network models and show that none accounts for observed genetic variation in human social networks. We propose an alternative “Attract and Introduce” model with two simple forms of heterogeneity that generates significant heritability as well as other important network features. We show that the model is well suited to real social networks in humans. These results suggest that natural selection may have played a role in the evolution of social networks. They also suggest that modeling intrinsic variation in network attributes may be important for understanding the way genes affect human behaviors and the way these behaviors spread from person to person.http://arxiv.org/abs/0807.3089 URL:https://bec.ucla.edu/event/james-fowler-genes-and-social-networks/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20090112T000000 DTEND;TZID=America/Los_Angeles:20090112T000000 DTSTAMP:20260504T190750 CREATED:20200922T214320Z LAST-MODIFIED:20201013T004832Z UID:4088-1231718400-1231718400@bec.ucla.edu SUMMARY:Karthik Panchanathan - Quantifying the Bystander Effect in a Multi-Player Dictator Game DESCRIPTION:Karthik Panchanathan: UCLA Department of AnthropologyBehavioral economics studies have shown people to have other-regarding social preferences. In the Dictator Game\, for example\, dictators transfer some portion of their endowment to recipients\, who start out without an endowment. If people were self-interested\, those assigned the role of dictator would keep all of their endowment; those assigned to be recipients would go home with nothing. In social psychology\, scores of studies document the Bystander Effect\, in which the likelihood of receiving help declines as the number of potential helpers increases. To reconcile pro-social preferences with the Bystander Effect\, psychologists propose the notion of diffusion of responsibility: while people want to see the victim helped\, they feel less of a responsibility to help when others are present and able to help. Here\, we present results from two multi-player dictator games\, one in the lab with real stakes (N=196) and one online with hypothetical stakes (N=215)\, to look for evidence of the diffusion of responsibility in an experimental economics setting. URL:https://bec.ucla.edu/event/karthik-panchanathan-quantifying-the-bystander-effect-in-a-multi-player-dictator-game/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20090105T000000 DTEND;TZID=America/Los_Angeles:20090105T000000 DTSTAMP:20260504T190750 CREATED:20200922T214318Z LAST-MODIFIED:20201013T004832Z UID:4087-1231113600-1231113600@bec.ucla.edu SUMMARY:Caleb Finch - The Role of Diet and Infection in Human Evolution DESCRIPTION:Caleb Finch: USC Davis School of GerontologyHuman lifespans have increased remarkably from the 20 year life expectancy (LE) of the great apes. The normative 40 y LE of pre-industrial peoples has recently risen to about 80 y in privileged populations during the last 200 years. I propose that diet and infections are key to understanding both demographic transitions. During human evolution\, human ancestors shifted from a largely plant based diet to include larger amounts of animal tissues and cholesterol intake that observed in the extant great apes. Exposure to infections also increased because of consumption of raw tissues and from close contact with feces not observed in great apes which rarely use the same night nest. In 2004\, Craig Stanford and I hypothesized that “meat-adaptive genes” enabled these transitions (Q Rev Biol. vol 79\, 2004). Apolipoprotein E is a candidate for pleiotropic genes with influences on blood lipids\, innate immunity\, and brain development; the apoE3 allele that increases LE spread in human populations about 225\,000 years ago. I will further discuss the possible role of apoE alleles and other genes in supporting the recent increase in LE during post 18th century improvements of diet and reduction of infections. URL:https://bec.ucla.edu/event/caleb-finch-the-role-of-diet-and-infection-in-human-evolution/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20081201T000000 DTEND;TZID=America/Los_Angeles:20081201T000000 DTSTAMP:20260504T190750 CREATED:20200922T214308Z LAST-MODIFIED:20201013T004832Z UID:4086-1228089600-1228089600@bec.ucla.edu SUMMARY:Peter DeScioli - The Alliance Hypothesis for Human Friendship DESCRIPTION:Peter DeScioli: Chapman University\, Economic Science InstituteExploration of the cognitive systems underlying human friendship will be advanced by identifying the biological functions these systems perform. Here I propose that human friendship results from cognitive mechanisms designed to assemble support groups for potential conflicts. I draw on game theory to identify computations about friends that can increase performance in multi-agent conflicts. This analysis suggests that people would benefit from: 1) ranking friends\, 2) hiding their friend-ranking\, and 3) ranking friends according to their own position in partners’ rankings. These possible tactics motivate the hypotheses that people possess egocentric and allocentric representations of the social world\, that people are motivated to conceal this information\, and that egocentric friend-ranking is determined by allocentric representations of partners’ friend-rankings (more than others’ traits). I report several investigations designed to test predictions derived from these hypotheses. The results suggest that the alliance hypothesis merits further attention as a candidate explanation for human friendship. URL:https://bec.ucla.edu/event/peter-descioli-the-alliance-hypothesis-for-human-friendship/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20081124T000000 DTEND;TZID=America/Los_Angeles:20081124T000000 DTSTAMP:20260504T190750 CREATED:20200922T214307Z LAST-MODIFIED:20201013T004833Z UID:4085-1227484800-1227484800@bec.ucla.edu SUMMARY:Tatsuya Kameda - Emotional Functioning and Socio-Economic Uncertainty: Is "Hikikomori" an Indigenous Cultural Pathology in Japan? DESCRIPTION:Tatsuya Kameda: Hokkaido University Department of Behavioral ScienceFeeling and expressing emotions appropriately in the right context is an essential component of social behavior. It has been suggested that emotional functioning has been weakened among contemporary Japanese youth\, who exhibit acute social withdrawal\, a “cultural pathology” known as Hikikomori (Hattori\, 2005; Zielenziger\, 2006). Assuming that Hikikomori is at least partially caused by socio-economic uncertainties faced by younger generations\, we predicted that the syndrome is not confined to a clinical subpopulation but should be manifested by even undiagnosed youth\, though in moderated form\, as a negative function of their family socio-economic status (SES). Results from an emotion-sampling study – in which participants’ reported their momentary emotional states 12 times per day for one-week during the course of their daily lives – and a laboratory experiment – which measured psycho-physiological responses to emotional stimuli – both supported this prediction. Implications of these findings for the well-being of youth in well-developed\, post-industrial societies are discussed. URL:https://bec.ucla.edu/event/tatsuya-kameda-emotional-functioning-and-socio-economic-uncertainty-is-hikikomori-an-indigenous-cultural-pathology-in-japan/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20081117T000000 DTEND;TZID=America/Los_Angeles:20081117T000000 DTSTAMP:20260504T190750 CREATED:20200922T214305Z LAST-MODIFIED:20201013T004833Z UID:4084-1226880000-1226880000@bec.ucla.edu SUMMARY:John Mikhail - Universal Moral Grammar: Theory\, Evidence\, and Future Research DESCRIPTION:John Mikhail: Georgetown LawScientists from various disciplines have begun to focus renewed attention on the psychology and biology of human morality. One research program that has recently gained attention is universal moral grammar (UMG). UMG seeks to describe the nature and origin of moral knowledge by using concepts and models similar to those used in Chomsky’s program in linguistics. This approach is thought to provide a fruitful perspective from which to investigate moral competence from computational\, ontogenetic\, behavioral\, physiological\, and phylogenetic perspectives. In my talk\, I first outline a framework for UMG and describe some of the evidence supporting it. I then discuss some initial findings of a related study in comparative law that seeks to determine how certain norms\, such as the prohibition of homicide\, are codified and interpreted in several hundred jurisdictions around the world. The study’s main finding\, the apparent universality or near-universality of specific justifications and excuses\, lends further support to UMG. It also raises novel questions for cognitive science\, broadly construed\, including neuroethics\, behavioral economics\, evolutionary psychology\, and legal anthropology.http://papers.ssrn.com/abstract=1163422 URL:https://bec.ucla.edu/event/john-mikhail-universal-moral-grammar-theory-evidence-and-future-research/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20081110T000000 DTEND;TZID=America/Los_Angeles:20081110T000000 DTSTAMP:20260504T190750 CREATED:20200922T214304Z LAST-MODIFIED:20201013T004833Z UID:4083-1226275200-1226275200@bec.ucla.edu SUMMARY:Noah Goldstein - The Constructive\, Destructive\, and Reconstructive Power of Social Norms DESCRIPTION:Noah Goldstein: UCLA Anderson School of ManagementSocial norms can be powerful drivers of human behavior\, which means that communicators who can properly harness norms hold in their hands a powerful tool for persuasion. If utilized properly\, communicators can effectively convey such norms in ways that motivate individuals to engage in positive\, constructive behaviors that benefit not only those individuals themselves but society as a whole. However\, even thoughtful and well meaning communicators can convey norms ineffectively—or worse\, elicit a negative\, destructive backfire effect that may exacerbate an already unappealing situation. Yet\, even in such instances\, when a certain social norm leads individuals to perform destructive behaviors\, other types of social norms can be employed to mitigate the negative influence of that norm. I will discuss how\, when\, and why different kinds of social norms play constructive\, destructive\, and even reconstructive roles in motivating human behavior. URL:https://bec.ucla.edu/event/noah-goldstein-the-constructive-destructive-and-reconstructive-power-of-social-norms/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20081103T000000 DTEND;TZID=America/Los_Angeles:20081103T000000 DTSTAMP:20260504T190750 CREATED:20200922T214303Z LAST-MODIFIED:20201013T004833Z UID:4082-1225670400-1225670400@bec.ucla.edu SUMMARY:John Alcock - Why I Am Still a Single-Minded Adaptationist DESCRIPTION:John Alcock: Arizona State University Department of Life SciencesI will review why I became an adaptationist and continue to believe that the theory of natural selection as amended by W.D. Hamilton supplies us with all we need in order to understand all aspects of animal behavior\, including that of our own species. I will examine the state of the study of animal behavior when I entered the field and the effects of the revolution that occurred around this time thanks to Hamilton and George C. Williams. I will present my take on the challenges to the “adaptationist programme” that have occurred since 1966. These challenges include Gould and Lewontin’s famous attack in the 1970s but also the current attempt to revive group selection led by David S. Wilson and E.O. Wilson. In addition\, I will explain why the cultural evolution approach to human behavior has only limited usefulness. I hope to be still in one piece when I am finished. URL:https://bec.ucla.edu/event/john-alcock-why-i-am-still-a-single-minded-adaptationist/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20081027T000000 DTEND;TZID=America/Los_Angeles:20081027T000000 DTSTAMP:20260504T190750 CREATED:20200922T214300Z LAST-MODIFIED:20201013T004833Z UID:4081-1225065600-1225065600@bec.ucla.edu SUMMARY:Brooke Scelza - Bush Forager\, Shop Forager: Production and Consumption Behavior in a Group of Western Desert Aborigines DESCRIPTION:Brooke Scelza: UCLA Department of AnthropologyAustralian Aborigines in the Western Desert have gone through a nutritional transition in the last 50 years; moving from a diet of mainly indigenous “bush foods” acquired during daily foraging trips to one that includes store-bought products delivered directly to community shops. Although store-bought foods are more convenient\, their availability fluctuates due to poor road conditions\, community budget constraints and food spoilage. Small game and certain species of widely available large game\, on the other hand\, require more energy to acquire\, but have a relatively consistent rate of return. An evolutionary perspective on diet choice suggests that people should make choices that will optimize their daily caloric intake and respond quickly to resource depletion. In this paper I will look at the consumption of foraged and store-bought foods in one Martu Aboriginal community to better understand issues of diet choice\, foraging time allocation and risk management. I will then place this case study within a broader framework to demonstrate how an evolutionary approach can illuminate new ways of thinking about human behavior related to diet and nutrition. URL:https://bec.ucla.edu/event/brooke-scelza-bush-forager-shop-forager-production-and-consumption-behavior-in-a-group-of-western-desert-aborigines/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20081020T000000 DTEND;TZID=America/Los_Angeles:20081020T000000 DTSTAMP:20260504T190750 CREATED:20200922T214259Z LAST-MODIFIED:20201013T004833Z UID:4080-1224460800-1224460800@bec.ucla.edu SUMMARY:Gary Charness - Three Field Experiments on Procrastination and Willpower / Territoriality and Gender in the Laboratory DESCRIPTION:Gary Charness: UC Santa Barbara Department of EconomicsWe conducted three field experiments to investigate how people schedule and complete tasks\, providing some of the first data concerning procrastination and willpower under financial incentives. In our first study\, we paid students $95 if they completed 75 hours of monitored studying over a five-week period. We also required people to meet interim weekly targets in one treatment\, but not in the other. In a second study\, the task consisted of answering of multiple-choice questions on seven consecutive days\, with staggered start dates and an endogenous task ordering (tasks varied by number of questions). In our third study\, participants answered 20 multiple-choice questions over two consecutive days\, varying whether this was during the week or on the weekend. Participants were required to complete an easy or difficult Stroop test (used by psychologists to deplete willpower) on the first day\, before any questions could be answered. We find evidence of procrastination and willpower depletion/replenishment\, as well as evidence suggesting a self-reputation interpretation. And yet the behavioral interventions we used led to outcomes that surprised us in all three studies\, although these outcomes are largely consistent with the standard neo-classical model.http://www.bec.ucla.edu/Charness_Procrastination.pdf URL:https://bec.ucla.edu/event/gary-charness-three-field-experiments-on-procrastination-and-willpower-territoriality-and-gender-in-the-laboratory/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20081013T000000 DTEND;TZID=America/Los_Angeles:20081013T000000 DTSTAMP:20260504T190750 CREATED:20200922T214257Z LAST-MODIFIED:20201013T004833Z UID:4079-1223856000-1223856000@bec.ucla.edu SUMMARY:Jessica Lynch Alfaro - Biological And Cultural Evolution In Capuchin Monkeys: Mapping Behavioral Traditions Onto A Cebus Molecular Phylogeny DESCRIPTION:Jessica Lynch Alfaro: UCLA Center for Society and GeneticsDespite growing interest in capuchin monkeys as model organisms for social learning and cultural evolution\, comparative evolutionary study of Cebus behavioral traits across field sites and species have been impeded by the lack of a robust phylogenetic hypothesis for the group. Here I present the first molecular phylogeny of Cebus and use it as a framework to study the evolution of social and foraging traditions\, including anointing behaviors and tool use. Using tissue collected from museum specimens of wild-caught capuchins of known provenance across Latin America\, I sequenced portions of three mtDNA genes (12s\, 800 bp; cytB\, 307 bp; d-loop\, 435 bp) and reconstructed phylogenetic relationships using likelihood and Bayesian methods. My data revealed Cebus as a monophyletic genus composed of distinct tufted and non-tufted clades. In contrast to morphological studies\, the data revealed that C. albifrons and C. libidinosis are each paraphyletic. Genetic diversity in the tufted capuchin clade was concentrated in the Atlantic forest\, and the Amazonian tufted capuchins were nested as a subclade within Atlantic forest capuchins. I estimated divergence times within Cebus using external fossil calibrations under the assumption of a relaxed molecular clock and used this timetree to test whether social and foraging traditions have evolved more quickly in tufted versus non-tufted clades. This study provides both the first detailed molecular phylogeny for Cebus and new approaches to examining rates of behavioral evolution for different traits across capuchin populations. Conclusions from this study have implications for the prioritization of conservation funding and data collection. URL:https://bec.ucla.edu/event/jessica-lynch-alfaro-biological-and-cultural-evolution-in-capuchin-monkeys-mapping-behavioral-traditions-onto-a-cebus-molecular-phylogeny/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20081006T000000 DTEND;TZID=America/Los_Angeles:20081006T000000 DTSTAMP:20260504T190750 CREATED:20200922T214256Z LAST-MODIFIED:20201013T004833Z UID:4078-1223251200-1223251200@bec.ucla.edu SUMMARY:Russell Jackson - What You See is not What You Get: Evolved Distance Perception Adaptations DESCRIPTION:Russell Jackson: CSU San Marcos Department of PsychologyDistance perception is among the most ubiquitous psychological phenomena known. Humans utilize distance estimation during all waking hours and even when sleeping. Distance perception likely takes place to this same extent in most other animals and distance perception also occurs in many non-animal species. \nFurthermore\, distance perception is one of the oldest researched topics in modern behavioral science. The most commonly cited founding of modern psychological science dates to Wundt’s investigations of distance perception in the late 1800s. Distance perception is among the most common mental tasks and has been investigated since the founding of psychology. \nUnfortunately\, some of the most important questions about distance perception remain unanswered. How and why do we perceive distances the way that we do? Why is distance perception sometimes wildly inaccurate? Why are there such big individual differences in distance perception? We have yet to answer to these questions well. \nRecent application of evolution by natural selection has yielded novel insights to these questions. I will discuss recent evidence from several empirical studies that discovered large magnitude visual effects\, including illusions\, in everyday distance perception. These illusions appear to occur constantly throughout human experiences and reach magnitudes of nearly a factor of two. These findings also illuminate a potential cause for the most prevalent\, but least acknowledged\, finding of all distance perception research. URL:https://bec.ucla.edu/event/russell-jackson-what-you-see-is-not-what-you-get-evolved-distance-perception-adaptations/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080929T000000 DTEND;TZID=America/Los_Angeles:20080929T000000 DTSTAMP:20260504T190750 CREATED:20200922T214255Z LAST-MODIFIED:20201013T004833Z UID:4077-1222646400-1222646400@bec.ucla.edu SUMMARY:Brian Skyrms - Evolution of Signaling Systems With Multiple Senders and Receivers DESCRIPTION:Brian Skyrms: UC Irvine Department of Logic & Philosophy of ScienceSender-Receiver games are simple\, tractable models of information transmission. They provide a basic setting for the study the evolution of meaning. It is possible to investigate not only the equilibrium structure of these games\, but also the dynamics of evolution and learning – with sometimes surprising results. Generalizations of the usual binary game to interactions with multiple senders\, multiple receivers\, or both\, provide the elements of signaling networks. These can be seen as the loci of information processing\, of group decisions\, and of teamwork. URL:https://bec.ucla.edu/event/brian-skyrms-evolution-of-signaling-systems-with-multiple-senders-and-receivers/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080602T000000 DTEND;TZID=America/Los_Angeles:20080602T000000 DTSTAMP:20260504T190750 CREATED:20200922T214127Z LAST-MODIFIED:20201013T004833Z UID:4076-1212364800-1212364800@bec.ucla.edu SUMMARY:Gyorgy Gergely - Beyond Imitative Learning: The case for Natural Pedagogy Evolutionary Mechanisms of Cultural Knowledge Transmission in Humans DESCRIPTION:Gyorgy Gergely: Central European University\, Budapest\, Stanford Center\nfor Advanced Studies in Behavioral SciencesHuman minds construct cultural products that form part of the environmental niche to which new generations of human minds must adapt. A remarkable feature of cultural transmission is that infants fast-learn a vast amount of cultural skills very early on even when they cannot yet fully grasp their relevant causal\, functional\, intentional\, or adaptive properties. This represents an apparent paradox: how can such cognitively ‘opaque’ cultural forms be successfully transmitted and maintained across generations? Are there specialized cognitive mechanisms evolved to make efficient intergenerational transfer of such cultural knowledge possible? \nThe dominant view holds that it is the capacity for imitative learning that serves the evolutionary function of\ncultural transmission in humans. I’ll argue\, however\, that presently proposed models of imitative learning face\nthe problem of ‘relevance-blindness’ as they lack appropriate selection mechanisms to differentiate relevant\n(to be re-enacted and learned) from non-relevant\, incidental to be disregarded) aspects of observed\nbehaviors. ‘Relevance-blind’ imitative copying would be a wasteful and inefficient transmission mechanism\nlikely to lead to distorted reproduction and eventual extinction of useful cultural innovations over the\ngenerations. \nI’ll suggest that the emergence of cognitively opaque cultural skills during hominin evolution and the\nconsequent need for their efficient intergenerational transmission created evolutionary pressure leading to the\nselection of a new type of ‘relevance-guided’ social-communicative learning mechanism of mutual design:\nthe system of ‘Natural Pedagogy’ (NP) (Gergely & Csibra\, 2006). On the naïve “teacher’s” side\, NP involves an\ninstinctual inclination to ostensively manifest – and guide the ignorant “learner’s” inferences to identify –\nrelevant cultural information to be fast-learned. On the naïve “learner’s” side\, NP involves evolved sensitivity\nto ‘ostensive’ (e.g.\, eye-contact\, contingent reactivity\, or infant-directed speech) and referential (e.g.\, gaze-shift\nor pointing) cues that are interpreted to signal the other’s communicative intention to manifest new\, relevant\n(and generalizable) cultural knowledge about a referent (and its kind). Such cues trigger a receptive learning\nattitude to fast-learn ostensively manifested contents even when they are cognitively opaque to the\nlearner. I’ll present evidence to support the NP hypothesis from our infancy studies testing the basic\nassumptions of the theory about the nature of early cultural learning in humans in a number of different\nknowledge domains. URL:https://bec.ucla.edu/event/gyorgy-gergely-beyond-imitative-learning-the-case-for-natural-pedagogy-evolutionary-mechanisms-of-cultural-knowledge-transmission-in-humans/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080519T000000 DTEND;TZID=America/Los_Angeles:20080519T000000 DTSTAMP:20260504T190750 CREATED:20200922T214127Z LAST-MODIFIED:20201013T004834Z UID:4075-1211155200-1211155200@bec.ucla.edu SUMMARY:Katie Hinde - Magnitude\, Sources\, and Consequences of Individual Variation in Milk Production in Rhesus Macaques DESCRIPTION:Katie Hinde: UCLA AnthropologyLactation represents the greatest post-natal cost of mothering in primates and numerous studies have\nestablished that variation in maternal condition is associated with infant growth\, development\, health\, and\nsurvival. Presumably the effects of maternal condition are mediated through milk output during lactation\,\nhowever this relationship remains poorly understood. Here I present the first systematic investigation of the\nmagnitude\, sources\, and consequences of individual variation in mother’s milk for an Old World monkey.\nRhesus macaques produce dilute milk typical of the primate order\, however there was substantial variation\nbetween mothers\, as well as within mother\, over lactation in milk composition and yield\, and therefore the milk\nenergy available for the infant. Maternal life history was associated with milk yield and milk energy density was\nbiased in favor of sons\, especially first-born sons. Infants that had higher available milk energy at one month\nof age were characterized by higher activity levels and greater confidence at 3.5 months of age suggesting that\nmother’s milk may serve as a nutritional cue that calibrates infant behavior and temperament to maternal\nand/or environmental conditions. These results\, obtained from a well-fed captive population\, demonstrate that\nsmall differences between mothers can have important implications for lactational investment and infant\noutcomes. URL:https://bec.ucla.edu/event/katie-hinde-magnitude-sources-and-consequences-of-individual-variation-in-milk-production-in-rhesus-macaques/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080512T000000 DTEND;TZID=America/Los_Angeles:20080512T000000 DTSTAMP:20260504T190750 CREATED:20200922T214126Z LAST-MODIFIED:20201013T004834Z UID:4074-1210550400-1210550400@bec.ucla.edu SUMMARY:Peter Todd - Investigating mate search with simulation and speed-dating DESCRIPTION:Peter Todd: U of Indiana Cognitive Science\, Informatics\, and Psychological and Brain SciencesThe choice of a mate is not only one of the most important decisions in our lives\, but also one of the most difficult\, fraught by lack of knowledge of the options to come and inability to return to options already passed by. How do we make this challenging sequential choice\, at the same time we are trying to convince someone else to choose us—and more specifically\, how do we decide when our search is over? To find out\, we could follow a set of individuals through multiple relationships over an extended period of time—or we can speed things up: We can build simulated mate-seekers who embody plausible decision rules for searching for partners\, and see how they fare in an artificial mating market\, comparing their behavior to that of aggregated humans. We can also speed up human mate-seekers themselves\, by having them participate in speed-dating events and observing their searches as they meet and interact with a succession of potential partners. With these methods we are testing a satisfying search model that adjusts mate aspiration levels lower after failed relationships and higher after successful ones. We are also able to test other hypotheses about the kinds of mate choices people make\, and how well matched they end up being. URL:https://bec.ucla.edu/event/peter-todd-investigating-mate-search-with-simulation-and-speed-dating/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080505T000000 DTEND;TZID=America/Los_Angeles:20080505T000000 DTSTAMP:20260504T190750 CREATED:20200922T214126Z LAST-MODIFIED:20201013T004834Z UID:4073-1209945600-1209945600@bec.ucla.edu SUMMARY:Debra Lieberman - It's all relative: Altruism\, sexual aversions\, and morality DESCRIPTION:Debra Lieberman: U of Hawaii PsychologyMechanisms for detecting kin rely on cues that correlated with relatedness in ancestral environments to adaptively regulate mate selection and altruistic effort. For siblings\, one potential cue\, proposed by Edward Westermarck\, is co-residence duration. Another cue that would have been highly predictive of siblingship is seeing one’s mother caring for a newborn. Data from a series of investigations show that these two cues regulate the development of altruistic motivations\, sexual aversions\, and\, as a by-product\, moral sentiments relating to incest. Revisiting the natural experiments that fueled the discussion over how sexual aversions and moral sentiments develop\, I show that these two cues also explain the data from the Taiwanese minor marriages. Furthermore\, I provide new evidence that childhood co-residence predicts altruistic tendencies\, sexual aversions\, and moral sentiments in individuals raised in the communal fashion of the Israeli Kibbutzim. URL:https://bec.ucla.edu/event/debra-lieberman-its-all-relative-altruism-sexual-aversions-and-morality/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080428T000000 DTEND;TZID=America/Los_Angeles:20080428T000000 DTSTAMP:20260504T190750 CREATED:20200922T214125Z LAST-MODIFIED:20201013T004834Z UID:4072-1209340800-1209340800@bec.ucla.edu SUMMARY:Susan Perry - Social learning about foraging strategies in wild capuchin monkeys. DESCRIPTION:Susan Perry: UCLA AnthropologyWhite-faced capuchin monkeys are best known for their innovation and traditions in the domain of social\ncommunication; however\, social learning appears to play a role in the acquisition of their foraging techniques\nas well. In this talk\, I explore several lines of evidence indicating social influence in food processing\ntechniques. Several foods are processed differently at different sites that are similar both genetically and\necologically. Within social groups\, those monkeys who spend more time together are also more likely to\nshare the same foraging technique. There is also evidence that monkeys bias their social learning\nopportunities to preferentially observe models who are foraging on rare or hard-to-process foods\, thus\nproviding useful information on what to eat and how to eat it. Developmental studies yield evidence for a\nconformity bias in use of food processing techniques\, even for individuals who have already learned both of\ntwo possible techniques. URL:https://bec.ucla.edu/event/susan-perry-social-learning-about-foraging-strategies-in-wild-capuchin-monkeys/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080421T000000 DTEND;TZID=America/Los_Angeles:20080421T000000 DTSTAMP:20260504T190750 CREATED:20200922T214118Z LAST-MODIFIED:20201013T004834Z UID:4071-1208736000-1208736000@bec.ucla.edu SUMMARY:Gary Marcus - Kluge: The Haphazard Construction of the Human Mind DESCRIPTION:Gary Marcus: NYU PsychologyIn fields ranging from reasoning to linguistics\, the idea of humans as perfect\, rational\, optimal creatures is\nmaking a comeback – but should it be? Hamlet’s musings that the mind was “noble in reason …infinite in\nfaculty” have their counterparts in recent scholarly claims that the mind consists of an “accumulation of\nsuperlatively well- engineered designs” shaped by the process of natural selection (Tooby and Cosmides\,\n1995)\, and the 2006 suggestions of Bayesian cognitive scientists Chater\, Tenenbaum and Yuille that “it\nseems increasingly plausible that human cognition may be explicable in rational probabilistic terms and that\,\nin core domains\, human cognition approaches an optimal level of performance”\, as well as in Chomsky’s\nrecent suggestions that language is close “to what some super-engineer would construct\, given the\nconditions that the language faculty must satisfy”. \nIn this talk\, I will I argue that this resurgent enthusiasm for rationality is misplaced\, for three reasons. First\, I\nwill suggest that recent empirical arguments in favor of human rationality rest on a fallacy of composition\,\nimplicitly but mistakenly assuming that evidence of rationality in some (carefully analyzed) aspects of cognition\nentails that the broader whole (i.e. the human mind in toto) is rational. In fact\, establishing that some particular\naspect of cognition is optimal (or perfect\, or near optimal) is not tantamount to showing that the system is a\nwhole is; current enthusiasm for optimality overlooks the possibility that the mind might be suboptimal even if\nsome (or even many) of the components of cognition have been optimized. Second\, I will argue that there is\nconsiderable empirical evidence (most well-known\, but rarely given due attention in the neo-Rationalist\nliterature) that militates against any strong claim of human cognitive perfection. Finally\, I will argue that the\nassumption that evolution tends creatures towards rationality or “superlative adaptation” is itself theoretically\nsuspect\, and ought to be considerably tempered by recognition of what Stephen Jay Gould called “remnants of\nhistory”\, or what might be termed evolutionary inertia. \nI will close by suggesting that mind might be better seen as what engineers call a kluge: clumsy and\ninelegant\, yet remarkably effective. URL:https://bec.ucla.edu/event/gary-marcus-kluge-the-haphazard-construction-of-the-human-mind/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080414T000000 DTEND;TZID=America/Los_Angeles:20080414T000000 DTSTAMP:20260504T190750 CREATED:20200922T214118Z LAST-MODIFIED:20201013T004834Z UID:4070-1208131200-1208131200@bec.ucla.edu SUMMARY:Carol Padden & Mark Aronoff - Embodied cognition in an emerging language: Al-Sayyid Bedouin Sign Language DESCRIPTION:Carol Padden & Mark Aronoff: UCSD\, Stonybrook UWe report here on work we have carried out with colleagues Wendy Sandler and Irit Meir on an emerging sign\nlanguage\, Al-Sayyid Bedouin Sign Language (ABSL). ABSL developed de novo in a small closed community\nof Bedouins which is now in its third generation of signers. In this talk\, we show how a new human language\nis assembled over a relatively short period of time. In this language\, the body emerges as a primary signifier\,\nfiguring prominently in the form of verbs\, particularly in grammatical notion of subject. Broadly\, we find that the\niconicity of the body and space around the body interacts with emerging grammatical structures\, including\nword order and morphology\, resulting in a complex story about the deployment of physical\, human resources\nin the service of natural language grammars. URL:https://bec.ucla.edu/event/carol-padden-mark-aronoff-embodied-cognition-in-an-emerging-language-al-sayyid-bedouin-sign-language/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080407T000000 DTEND;TZID=America/Los_Angeles:20080407T000000 DTSTAMP:20260504T190750 CREATED:20200922T214118Z LAST-MODIFIED:20201013T004834Z UID:4069-1207526400-1207526400@bec.ucla.edu SUMMARY:Sam Bowles - The Coevolution of Parochial Altruism and War DESCRIPTION:Sam Bowles: Santa Fe InstituteAltruism — benefiting fellow group members at a cost to oneself — and parochialism – hostility toward\nindividuals not of one’s own ethnic\, racial or other group — are common human behaviors. The intersection of\nthe two – which we term parochial altruism — is puzzling from an evolutionary perspective because altruistic or\nparochial behavior reduces ones payoffs by comparison to what one would gain by eschewing these\nbehaviors. But parochial altruism could have evolved if parochialism promoted inter-group hostilities and the\ncombination of altruism and parochialism contributed to success in these conflicts. Our game-theoretic\nanalysis and agent-based simulations show that under conditions likely to have been experienced by late\nPleistocene and early Holocene humans\, neither parochialism nor altruism is viable singly\, but by promoting\ngroup conflict\, they could have evolved jointly. http://www.bec.ucla.edu/Bowles.pdf URL:https://bec.ucla.edu/event/sam-bowles-the-coevolution-of-parochial-altruism-and-war/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080331T000000 DTEND;TZID=America/Los_Angeles:20080331T000000 DTSTAMP:20260504T190750 CREATED:20200922T214117Z LAST-MODIFIED:20201013T004834Z UID:4068-1206921600-1206921600@bec.ucla.edu SUMMARY:Carel van Schaik - Dominance styles and male-male coalitions among nonhuman primates and humans DESCRIPTION:Carel van Schaik: Anthropological Institute & Museum\, University of ZurichNaturalistic data on nonhuman primates show that the degree of despotism among males in primate groups\nis predicted by the degree to which mating access to females can be monopolized. Degree of despotism\nshould affect other aspects of male behavioral strategies\, such as how long top-dominants’ tenure is\, how\ntop-dominance is achieved and which groups are targeted for dispersal\, as well as the feasibility and\nprofitability of different kinds of male-male coalitions. Primate data support these predictions. This primate\nmodel is then applied to human foragers. A fundamental difference is caused by the presence of weaponry.\nWhen opportunities for despotism increase\, violent coalitionary takeovers of top dominance and the formation\nof elites emerge. URL:https://bec.ucla.edu/event/carel-van-schaik-dominance-styles-and-male-male-coalitions-among-nonhuman-primates-and-humans/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080310T000000 DTEND;TZID=America/Los_Angeles:20080310T000000 DTSTAMP:20260504T190750 CREATED:20200922T214117Z LAST-MODIFIED:20201013T004834Z UID:4067-1205107200-1205107200@bec.ucla.edu SUMMARY:Becky Frank - The role of contingent reciprocity and market exchange in the lives of female olive baboons DESCRIPTION:Becky Frank: UCLA AnthropologyThe goal of this project was to examine the dynamics of exchange among female baboons and test\npredictions derived from a biological market model of grooming. Evolutionary theory predicts that cooperation\namong nonkin will be limited to reciprocating partners who monitor the balance of trade within their\nrelationships in order to prevent cheating. But primates may be cognitively limited to negotiating balanced\nreciprocity over very short time scales. If so\, then trade might be regulated in a biological market\, where\nsupply and demand determines the value of an exchange\, and individuals choose to trade with the partner\noffering the highest value. Individuals maximize their immediate benefits without having to monitor the\nbalance of their exchanges over time. When demand for a partner or commodity is greater than the supply\,\nindividuals compete for access to the preferred partner by raising the price they are willing to pay. Applied to\nprimate grooming exchanges\, a market model predicts that females will balance the amount of grooming they\ntrade within single bouts when all partners offer similar value. In some cases\, partners can offer other\nvaluable benefits and will trade those with who ever offers the most grooming in return. Thus\, females are\npredicted to trade grooming for access to resources when feeding competition is elevated and rank\ndifferences translate to differential foraging success. Females are also predicted to trade grooming with\nmothers of young infants in exchange for access to the infant. I tested these predictions in a group of 16 adult\nfemale olive baboons in Chololo\, Kenya. In this troop\, females only reciprocated within the same grooming\nbout 34% of the time and balanced their grooming more evenly over many bouts than within single bouts.\nNon-mothers preferentially groomed mothers of young infants\, but did not compete for access to infants by\nraising their grooming offers to mothers as the availability of infants declined. When feeding conflict within\ndyads was high\, females provided additional grooming to their higher ranking partners\, but they do not spend\nmore time co-feeding in return. These results suggest that female baboons are capable of monitoring their\nexchanges over time and can trade across some currencies\, but it is not clear that market pricing explains the\nobserved patterning of exchange. URL:https://bec.ucla.edu/event/becky-frank-the-role-of-contingent-reciprocity-and-market-exchange-in-the-lives-of-female-olive-baboons/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080303T000000 DTEND;TZID=America/Los_Angeles:20080303T000000 DTSTAMP:20260504T190750 CREATED:20200922T214026Z LAST-MODIFIED:20201013T004835Z UID:4066-1204502400-1204502400@bec.ucla.edu SUMMARY:Jelmer Eerkens - Material culture evolution: an archaeological perspective on forces and rates of change DESCRIPTION:Jelmer Eerkens: UC Davis AnthropologyLaboratory experiments and ethnographic studies show that many aspects of human culture\, particularly\ninformation\, can change quickly in the course of transmission. The archaeological record indicates much\nmore conservative rates of change\, at least for material culture. Is there common theoretical ground between\nthe micro- and macro- scales? This paper considers some of the factors that affect culture change and the\nrate at which material culture\, and variation therein\, might change in the archaeological record. As well\, it\nexplores the micro-macro perspectives. URL:https://bec.ucla.edu/event/jelmer-eerkens-material-culture-evolution-an-archaeological-perspective-on-forces-and-rates-of-change/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080225T000000 DTEND;TZID=America/Los_Angeles:20080225T000000 DTSTAMP:20260504T190750 CREATED:20200922T214025Z LAST-MODIFIED:20201013T004835Z UID:4065-1203897600-1203897600@bec.ucla.edu SUMMARY:John Mitani - Cooperation in wild chimpanzees DESCRIPTION:John Mitani: University of Michigan Anthropology URL:https://bec.ucla.edu/event/john-mitani-cooperation-in-wild-chimpanzees/ CATEGORIES:Past Presentation,Presentation END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Los_Angeles:20080211T000000 DTEND;TZID=America/Los_Angeles:20080211T000000 DTSTAMP:20260504T190750 CREATED:20200922T214024Z LAST-MODIFIED:20201013T004835Z UID:4064-1202688000-1202688000@bec.ucla.edu SUMMARY:Steve Gangestad - Human Estrus: Function and Phylogeny DESCRIPTION:Steve Gangestad: University of New Mexico PsychologyBroad\, ambitious conceptualizations of the evolution of human sexuality (and accompanying unique social\,\ndevelopmental\, and intellectual adaptations) offered by anthropologists and biologists over the last half\ncentury have been\, almost universally\, rooted in a foundational assumption: That women evolutionarily “lost”\nestrus—a distinct fertile-phase sexuality—and instead evolved “continuous” sexuality across the reproductive\ncycle\, which functioned to “conceal” ovulation. Recent research suggests that this assumption is wrong;\nwomen clearly do exhibit a distinct “fertile-phase” sexuality. This talk addresses a number of questions about\nthe conceptual significance and theoretical meaning of these recent findings: (a) Is this fertile phase sexuality\nappropriately referred to as human “estrus\,” and\, if so\, on what basis?; (b) What selection pressures shaped\nfertile-phase sexuality; was it shaped through direct selection or through indirect selection (i.e.\, as\nbyproduct)?; (c) Recent evidence also suggests that men respond differently to women as a function of their\nphase (typically\, being more attracted to women in their fertile phases than women in their luteal phases); is\nwomen’s fertility in fact not concealed? A general reinterpretation of women’s purported “lost estrus\,”\ncontinuous sexuality\, and concealment of fertility will be offered. The theme that a proper understanding of\nhuman sexuality requires a broader comparative perspective than is often brought to bear in evolutionary\npsychology is stressed. URL:https://bec.ucla.edu/event/steve-gangestad-human-estrus-function-and-phylogeny/ CATEGORIES:Past Presentation,Presentation END:VEVENT END:VCALENDAR