Group choice: competition, travel, and the ideal free distribution

If a group of foragers distributes among resource patches according to the ideal free distribution, the relative number of foragers in each patch should match the relative amount of resource obtained there, unless deviations arise from factors such as incomplete information or interforager interference. In analogy to individual choice, such effects may produce undermatching—group distribution falling short of resource distribution—or overmatching—group distribution overshooting resource distribution. In the present experiments, a flock of about 30 pigeons distributed between two patches with continuous inputs of green peas. Competition was varied by changing the size or extent of the patches. When the patches were areas or troughs, some undermatching occurred. When the patches were small bowls, strong undermatching occurred. When travel was required to switch patches, undermatching decreased slightly. A visual barrier that prevented pigeons from seeing one patch from the other had no effect. Overall rate of food delivery, varied over a wide range, had no effect. It appeared that the mechanism of flock distribution depended on comparisons between patches that were successive rather than simultaneous. Although most pigeons participated in the experiments, and different pigeons participated to different extents, individual pigeons tended to be consistent in the extent of participation from session to session, suggesting the possibility that participation might reflect competitive ability. Examination of the preferences and switching of individual pigeons revealed no consistency within or across individuals. It appeared that the flock's distribution was a truly emergent phenomenon, in the sense that results at the level of the flock in no way paralleled behavior at the level of the individual.     

The Brier Rule Is not a Good Measure of Epistemic Utility (and Other Useful Facts about Epistemic Betterness)

Measures of epistemic utility are used by formal epistemologists to make determinations of epistemic betterness among cognitive states. The Brier rule is the most popular choice (by far) among formal epistemologists for such a measure. In this paper, however, we show that the Brier rule is sometimes seriously wrong about whether one cognitive state is epistemically better than another. In particular, there are cases where an agent gets evidence that definitively eliminates a false hypothesis (and the probabilities assigned to the other hypotheses stay in the same ratios), but where the Brier rule says that things have become epistemically worse. Along the way to this ‘elimination experiment’ counter-example to the Brier rule as a measure of epistemic utility, we identify several useful monotonicity principles for epistemic betterness. We also reply to several potential objections to this counter-example.     

Francis Collins,the Skeptics,and Evidence for God

Skeptical Inquirer magazine has published an attempted refutation of Francis Collins' book, The Language of God. The refutation argues that Collins lacks scientific evidence for God and that Collins actually appeals not to evidence, but to personal belief. In refutation of this refutation, Ted Peters argues that Collins plays completely within the rules of scientific discourse while providing rational evidence—though not conclusive proof—for the existence of God as creator and moral lawgiver.     

Archbishop Wulfstan and the importance of paying God his dues

Archbishop Wulfstan of York (d. 1023) stands as one of the most powerful churchmen of his age. His sermons, law-codes, and political tracts are carefully crafted pieces of rhetorical power, albeit often prone to exergasia, anaphora, and epiphora. They are excellent examples of the quality and power of episcopal prose in the eleventh century, and the very real concerns facing the Anglo-Saxon realm. Beyond the enduring appeal and colourful flavour of his writings, it is possible to see a very determined effort to demand from the lay population a large number of payments for the service of the Church. Whilst this may appear a rather narrow-minded focus, certainly in a time of war and invasion, it will be argued here that for Wulfstan they offered a vehicle by which disaster could be averted, society could be aligned along proper Christian lines, and the nation itself could be saved.     

脑激活定律

用物理学的观点在系统水平上讨论脑内功能子系统的脑区激活及相互作用。引入一些参量描述脑功能特性 ,并且根据现有实验事实提出脑激活的四条定律。     

法律运行道德追问的两重向度

将法律运行的道德追问规定为两重向度 ,既有其学理的依据 ,又是历史给予的启示和破解现实难题的需要。对立法的道德追问不仅要考察法之形式正义和实质正义 ,而且要审视法与社会主导道德以及与广大民众心理和情感相契合的状况。对司法的道德追问则不仅要关注司法是否公正以及司法工作者是否具有良好的职业道德素质 ,而且应特别关注当下我国社会全面转型时期司法之“应然”。     

Mission and People with Disabilities

This article begins with a few thoughts and some historical and canonical encounters about how lay and ordained people with disabilities have been involved in Orthodox mission work in the past. It then presents two concrete contemporary situations in which people with disabilities are involved in Orthodox ordained ministry work despite the persisting tradition that disabled people not be ordained. The first example is taken from the Eritrean Orthodox Tewahedo Church, where the involvement of people with disabilities in both ordained and lay ministry provides significant support for a church that lives in a delicate situation. The second example is taken from the Romanian Orthodox Church and presents the case of Father Theophilus P?r?ian, one of the most prominent contemporary Romanian Orthodox monastic figures, who served as an ordained priest despite his disability. This article pleads for a deeper involvement of disabled people in both ordained and lay ministry in Orthodox churches.     

Fitts' Law is Applicable to Trunk Coordination Measurements in a Sitting Position

Trunk coordination is essential for many activities of daily living in wheelchair users. This study investigated whether Fitts' law is applicable to trunk movements in a sitting position. Fourteen healthy adults performed two series of 24 tasks of trunk flexion–extension movements in a sitting position. The results showed significant linear relationships between average group movement time (MT) and index of difficulty (ID) over all tasks (r² = 0.92) and within target distances (0.94 < r² < 1.00). Target distance affected intercept and slope (P < 0.001). Hence, Fitts' law is applicable to the studied trunk movements in a sitting position, indicating these trunk movements tasks could serve as a basis for qualitative trunk coordination tests. Transferability of these conclusions to wheelchair users, and optimal test design should be further investigated.     

Minimizing Mistreatment by Female Adults: The Influence of Gender-Based Social Categories and Personality Differences on Attitudes about Child Sexual Abuse

We investigated the effects of gender-based social categories (i.e., men, women, boys, and girls) on attitudes about child sexual abuse and individual differences in the use of such categories. In four experiments, we systematically varied perpetrators’ sex and victims’ sex. In three investigations, we assessed personality variables potentially related to participants’ use of these social categories. Across these four experiments, we varied perpetrator-victim relationships (teacher-student, neighbors) and victims’ ages. In experiment one, individuals had the least negative attitude about child sexual abuse involving adult female neighbors and eighth grade male neighbors. In experiment two, we replicated this effect with fifth grade victims and demonstrated that attitudes were moderated by individual differences in intolerance of ambiguity. In experiment three, we again replicated the aforementioned effect while (a) extending this finding to teacher-student relationships with eighth grade adolescent victims and (b) demonstrating the need for cognition was a moderator. In experiment four, we again replicated (a) our perpetrator sex/victim sex interactive effect and (b) need for cognition moderation while also demonstrating that these effects were applicable to fifth grade victims. Methodological limitations as well as clinical and policy implications (e.g., attenuating the underreporting incidents of child sexual abuse) are discussed.