BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Center for Behavior, Evolution, and Culture - ECPv6.16.5.1//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: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:20090105T000000 DTEND;TZID=America/Los_Angeles:20090105T000000 DTSTAMP:20201013T004832Z 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:20090112T000000 DTEND;TZID=America/Los_Angeles:20090112T000000 DTSTAMP:20201013T004832Z 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:20090126T000000 DTEND;TZID=America/Los_Angeles:20090126T000000 DTSTAMP:20201013T004832Z 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 END:VCALENDAR