Passion and Compassion: Psychology of Kin Relations within and Beyond the Family

Family is special. People avoid sexual contact with close relatives, but at the same time are highly beneficent toward them. Such discriminatory behavior is guided by a set of psychological mechanisms, heuristics that facilitate evolutionarily adaptive behavior most of the time but may lead to overperception of kinship under specific circumstances. In this chapter, we describe psychological mechanisms of kin recognition in sexual and altruistic contexts, and we discuss the extent to which these mechanisms may influence close relationships between unrelated individuals, resulting in an experience of “psychological kinship.” We suggest that friendship may provide a context within which overinclusive kin recognition is especially likely to occur, especially among women. We also identify questions for future research, including when men might be especially prone to overperceiving kinship

Superfluid transitions in bosonic atom-molecule mixtures near Feshbach resonance

We study bosonic atoms near a Feshbach resonance, and predict that in addition to a standard normal and atomic superfluid phases, this system generically exhibits a distinct phase of matter: a molecular superfluid, where molecules are superfluid while atoms are not. We explore zero- and finite-temperature properties of the molecular superfluid (a bosonic, strong-coupling analog of a BCS superconductor), and study quantum and classical phase transitions between the normal, molecular superfluid and atomic superfluid states.Comment: 4 revtex pages, 3 eps figures; submitted to PR

The asymmetric behavioral homeostasis hypothesis: Unidirectional flexibility of fundamental motivational processes

International audienc

Female intrasexual competition is affected by the sexual orientation of the target and the ovulatory cycle

Research suggests that women use indirect aggression strategies to compete with same-sex peers and improve their mating prospects. One such tactic involves strategically transmitting reputation-damaging information as opposed to reputation-enhancing information, to lessen the appeal of sexual rivals. The present study further examined whether this strategic information transmission constitutes an intrasexual competition strategy, by comparing denigration of same-sex peers who constitute sexual competitors or noncompetitors as determined by their sexual orientation. This study also explored the impact of the ovulatory cycle on this strategy, following research suggesting that hormone fluctuation drives subtle behavioral changes near ovulation, amplifying other forms of intrasexual competition between women. Results indicated that among women identifying as straight, exposure to a same-sex peer who constituted a sexual rival (straight/bisexual target) led to greater transmission of reputation-damaging information relative to reputation-enhancing information, compared with exposure to a noncompetitor (lesbian target). The ovulatory cycle was foundto be associated with denigration, but this did not depend on the sexuality of the target. Participants in the estimated high-estrogen phase showed greater denigration overall than participants in the low-estrogen phase, regardless of the target's sexuality

CalYOUTH Survey of Young Adults' Child Welfare Workers

This report presents the results of the CalYOUTH Survey of Young Adults' Child Welfare Workers, a survey of case workers supervising youth in extended foster care who are participating in the CalYOUTH Youth Survey. The report shares the county child welfare workers' views on how these young people are faring with the transition to adulthood, as well as their preparedness and service needs in a wide range of areas. The report also shares workers' perceptions of the availability and helpfulness of services within their county, their perceptions of court personnel's supportiveness of extended care, their satisfaction with collaboration with other systems of potential support for youth, and their views of challenges to effective implementation of extended foster care in California. The survey results highlight areas of progress and opportunities for continued improvement as California continues its development of foster care for young adults

Sine-Gordon Field Theory for the Kosterlitz-Thouless Transitions on Fluctuating Membranes

In the preceding paper, we derived Coulomb-gas and sine-Gordon Hamiltonians to describe the Kosterlitz-Thouless transition on a fluctuating surface. These Hamiltonians contain couplings to Gaussian curvature not found in a rigid flat surface. In this paper, we derive renormalization-group recursion relations for the sine-Gordon model using field-theoretic techniques developed to study flat space problems.Comment: REVTEX, 14 pages with 6 postscript figures compressed using uufiles. Accepted for publication in Phys. Rev.