Pure reasoning in 12-month-old infants as probabilistic inference

Many organisms can predict future events from the statistics of past experience, but humans also excel at making predictions by pure reasoning: integrating multiple sources of information, guided by abstract knowledge, to form rational expectations about novel situations, never directly experienced. Here, we show that this reasoning is surprisingly rich, powerful, and coherent even in preverbal infants. When 12-month-old infants view complex displays of multiple moving objects, they form time-varying expectations about future events that are a systematic and rational function of several stimulus variables. Infants' looking times are consistent with a Bayesian ideal observer embodying abstract principles of object motion. The model explains infants' statistical expectations and classic qualitative findings about object cognition in younger babies, not originally viewed as probabilistic inferences.     

Ethical dilemmas in agriculture: The need for recognition and resolution

Agricultural research and education ended 100 years of funding under the Hatch Act with a decade of unprecedented criticism of goals and outcomes. This paper examines the way that planners can accommodate some of these criticisms within a framework for understanding the ethical and social goals of agriculture that is consistent with traditional practice. The paper goes on to state that some criticisms are so fundamental that they cannot be readily incorporated into this framework. They must be regarded as a challenge, both politically and intellectually, to longstanding practices within academic institutions devoted to agriculture.     

A distinct role of the temporal-parietal junction in predicting socially guided decisions

To make adaptive decisions in a social context, humans must identify relevant agents in the environment, infer their underlying strategies and motivations, and predict their upcoming actions. We used functional magnetic resonance imaging, in conjunction with combinatorial multivariate pattern analysis, to predict human participants' subsequent decisions in an incentive-compatible poker game. We found that signals from the temporal-parietal junction provided unique information about the nature of the upcoming decision, and that information was specific to decisions against agents who were both social and relevant for future behavior.     

Foundress associations in polistine wasps: dominance hierarchies and the evolution of social behavior

Interactions among female paper wasps of newly founded colonies suggest that dominance relations assign social (reproductive) roles to siblings in a way advantageous to both dominants and subordinates. In various social animals dominance relations may have been an important prerequisite for the evolution of a division of labor between reproductive and nonreproductive (or less reproductive) adults.     

Should arthropod parasitoids and predators be subject to host range testing when used as biological control agents?

Testing of candidate biological control agents to estimate their likely field host ranges in the area of release has been part of weed biological control for several decades, with evolving techniques and goals. Similar efforts have been made less often for parasitoids and predators being introduced for arthropod biological control. Here, we review both techniques of host range testing and social objectives of such screening. We ask whether agents introduced for arthropod biological control should be subjected to host range testing before release, and if so, are methods used for estimating host ranges of herbivorous arthropods appropriate, or are different approaches needed. Current examples in which host range testing has been employed for arthropod biological control are reviewed. We conclude with recommendations concerning guiding principles about use of host range testing. We recommend modest expansion of host range testing for arthropod biological control for projects on continents. We recommend more extensive testing for projects of introduction onto islands. We note that introductions to islands could provide opportunities to gain experience in use of host range estimation for this class of organisms and to conduct post release evaluations of host ranges. We urge caution in efforts to mandate host range testing but simultaneously recommend consultation between biological control workers and insect conservationists.     

Do 15-month-old infants understand false beliefs?

For more than two decades, researchers have argued that young children do not understand mental states such as beliefs. Part of the evidence for this claim comes from preschoolers' failure at verbal tasks that require the understanding that others may hold false beliefs. Here, we used a novel nonverbal task to examine 15-month-old infants' ability to predict an actor's behavior on the basis of her true or false belief about a toy's hiding place. Results were positive, supporting the view that, from a young age, children appeal to mental states--goals, perceptions, and beliefs--to explain the behavior of others.     

The social goals of agriculture

An analysis of social goals for agriculture presupposes an account of systematic interactions among economic, political, and ecological forces that influence the performance of agriculture in a given society. This account must identify functional performance criteria that lend themselves to interpretation as normative or ethical goals. Individuals who act within the system pursue personal goals. Although individual acts and decisions help satisfy functional performance criteria, individuals may never conceptualize or understand these criteria, and, hence, social goals for agriculture may not be intentionally sought or desired by any human being. The statement of social goals is not, therefore, reducible to statements about individual desires and preferences, and the validity of social goals does not depend upon deriving a social welfare function, nor upon measuring interpersonal utility. The paper examines a series of strategies for defining social goals for agriculture, beginning with the statement of goals offered by William Aiken in 1983. Aiken's view stresses individually based constraints upon action, but social goals cannot be adequately defined on this view. Successively more adequate approaches to the problem of social goals are examined with respect to production and efficiency, Jeffersonian democracy, and ecosystem goals of community and self-reliance. The role of family farms, and the change in farm structure is evaluated in light of this analysis for social goals.     

Visual language discrimination in infancy

This study shows that 4- and 6-month-old infants can discriminate languages (English from French) just from viewing silently presented articulations. By the age of 8 months, only bilingual (French-English) infants succeed at this task. These findings reveal a surprisingly early preparedness for visual language discrimination and highlight infants' selectivity for retaining only necessary perceptual sensitivities.     

Individual ethics and the social goals of agriculture

This article is a response to Paul Thompson's recent claim that individual farmers cannot have obligations to practice sustainable methods unless a large number of other producers also use them. Using a moral rights framework, I explain the relation of human interests and needs to the duties of individuals to accomplish moral social goals; i.e., those moral goals whose accomplishment requires the cooperation of other persons. The purpose is to show that individual action to promote sustainability does have moral value. Duties to practice sustainable methods are derived from the rights of all persons to adequate food and nutrition. These rights themselves are grounded, not in individual subjective desires or preferences, but in the genuine interests all persons (present and future) have in the satisfaction of basic biological needs to sustain life and health. The duty of each person is correlative to the rights of the others, and fulfillment of the duty requires social action, in this case practicing sustainable methods in farming. If others are unwilling or constrained from fulfilling their obligations, then duties to take other kinds of actions may be derived from the primary duty to attain the goal of sustainability. Actions to secure social cooperation may include, for example, exhorting others to participate and taking political action to force restructuring of agricultural policy, as well as practicing sustainable methods on one's own farm. While frameworks of individual responsibility have been attacked as failing to capture the moral importance of holistic outcomes, it is argued that such problems are related to human motivation rather than to the structure of our moral systems. I conclude that a properly elaborated system of moral rights and duties connected with an adequate moral psychology can account for our duties to other humans to accomplish the goal of a sustainable agriculture.     

Effects of brief separation from mother on rhesus monkeys

To summarize, data on the course of development of mother-infant relations in rhesus monkeys have been presented; a method for teasing apart the relative roles of mother and infant in causing changes or differences in the interaction described; and the complexity of the social nexus, within which the relationship is set, stressed. When the mother is removed for a few days, the infant calls a great deal at first and then shows depressed locomotor and play activity. These symptoms may last for a month after the mother's return. Simple tests given 6 months and even 2 years later strongly suggest that the differences (between infants that have had such a separation experience and infants that have not) are persistent. Are these data relevant to the human case? The rhesus monkey has no verbal language and a much less complex social development than man. Furthermore, its social environment is quite different from that found in any human culture. Parallels between monkey and man must therefore be scrutinized carefully before being used as a basis for generalization. But the facts show that a brief separation experience produces in rhesus monkey infants symptoms that are very similar (except for the apparent absence of a "phase of detachment" on reunion) to those in human infants (25). While age of separation, within the rather narrow limits used here, was a variable of minor importance, the effects of the separation varied, as in the human case, with the length of the separation experience and the sex of the infant. Differences in the techniques of experimenters, as well as differences in the species, prevent precise comparisons of the roles of the mother-infant relationships; nevertheless, the nature of the relationship appears to be an important variable in both monkey and man. There would seem, therefore, to be strong reasons for thinking that we are dealing with comparable phenomena. If that is the case, the fact that monkeys function at a simpler conceptual level than man limits the complexity of the explanatory hypotheses necessary in the human case. In addition, the finding that such a brief separation experience, involving removal of the mother but no exposure to a strange environment, can produce effects lasting for months or years in rhesus monkeys strengthens the evidence that long-term effects may occur also in man. Finally, this analysis provides bases for attempts to predict individual differences in the effects of a period of separation on rhesus infants, and the parallels with man suggest that examination of the same variables in the human case would be worthwhile.     

实施生态扶贫战略提高生态建设和扶贫工作的整体效果

扶贫开发和生态建设是我国社会发展所面临的两项重要任务。改革开放以来,我国的开放式扶贫工作和生态建设项目取得了举世瞩目的成就。但由于这两项任务实施目标不同,已有项目并没有相互兼顾,近三十年的实践表明,两类项目所瞄准的地区存在较高重叠。因此,实施生态扶贫战略,兼顾减贫和改善生态环境的双重目标,提高两者的整体效果,探索一条符合我国国情的生态建设和扶贫双赢的道路,对于建设社会主义新农村和构建和谐社会具有积极意义。文章最后提出实施生态扶贫战略的四项主要目标。     

基于CA-Markov模型和MCE约束的白洋淀流域景观动态研究

CA-Markov模型对景观动态分析的精度受到环境因素的影响,本研究以添加约束条件的MCE-CA-Markov模型为对比,基于白洋淀流域2008、2013年和2018年的景观数据对2023年景观进行预测,比较CA-Markov模型和MCE-CA-Markov模型模拟结果差异。结果表明： 2008、2013、2018年三个时点的耕地和林地面积合计均超过白洋淀流域总面积的75%,始终为基质景观。各景观类型斑块2008—2018年破碎且分散,耕地、林地的优势度逐渐降低,全流域格局多样性和复杂程度明显增强。2018—2023年,白洋淀流域耕地、林地面积减少,其他景观面积增加,各景观斑块主要呈紧实且聚集状态,建设用地优势度逐渐升高,全流域格局趋于多样化和均匀化。经验证,MCE-CA-Markov模拟精度（0.900 7）优于CA-Markov模型,2023年白洋淀景观结构和格局变化幅度整体小于CA-Markov模拟结果,且各景观转化特征更符合社会发展实际。     

Supermarket power, own-labels, and manufacturer counterstrategies: international relations of cooperation and competition in the fruit canning industry

Growing supermarket dominance and the expansion of own-label market share in Australia has put considerable pressure on agri-food manufacturers, and the recent movement of a number of manufacturing operations off-shore has attracted widespread attention. This paper examines the pursuit of an international manufacturing base by SPC Ardmona, one of Australia’s major fruit and vegetable processors, with a focus on strategic alliances formed with Siam Foods in Thailand and Rhodes Food Group in South Africa/Swaziland. Strategic horizontal alliances have become increasingly important for manufacturers seeking to counter retailer dominance, yet have received little attention in the agri-food literature. The two alliances examined in this paper illustrate the profound importance of prevailing societal and institutional environments in which production networks ‘touch-down’, and their influence on firm-level dynamics of trust, motivation, corporate values, and strategic objectives. Horizontal alliances can offer a promising alternative to cut-throat competition and a ‘race- to-the-bottom’ between agri-food manufacturers. However, with own-label sourcing strategies deepening competition between geographically-disparate manufacturers, identifying compatible alliance partners is likely to become an increasingly greater challenge.     

Functional neuroimaging of speech perception in infants

Human infants begin to acquire their native language in the first months of life. To determine which brain regions support language processing at this young age, we measured with functional magnetic resonance imaging the brain activity evoked by normal and reversed speech in awake and sleeping 3-month-old infants. Left-lateralized brain regions similar to those of adults, including the superior temporal and angular gyri, were already active in infants. Additional activation in right prefrontal cortex was seen only in awake infants processing normal speech. Thus, precursors of adult cortical language areas are already active in infants, well before the onset of speech production.     

Mining for justice in the food system: perceptions,practices, and possibilities

Despite much popular interest in food issues, there remains a lack of social justice in the American agrifood system, as evidenced by prevalent hunger and obesity in low-income populations and exploitation of farmworkers. While many consumers and alternative agrifood organizations express interest in and support social justice goals, the incorporation of these goals into on-the-ground alternatives is often tenuous. Academics have an important role in calling out social justice issues and developing the critical thinking skills that can redress inequality in the agrifood system. Academics can challenge ideological categories of inquiry and problem definition, include justice factors in defining research problems, and develop participatory, problem-solving research within social justice movements. In addition, scholars can educate students about the power of epistemologies, discourse, and ideology, thereby expanding the limits and boundaries of what is possible in transforming the agrifood system. In these ways, the academy can be a key player in the creation of a diverse agrifood movement that embraces the discourse of social justice.

The influence of social hierarchy on primate health

Dominance hierarchies occur in numerous social species, and rank within them can greatly influence the quality of life of an animal. In this review, I consider how rank can also influence physiology and health. I first consider whether it is high- or low-ranking animals that are most stressed in a dominance hierarchy; this turns out to vary as a function of the social organization in different species and populations. I then review how the stressful characteristics of social rank have adverse adrenocortical, cardiovascular, reproductive, immunological, and neurobiological consequences. Finally, I consider how these findings apply to the human realm of health, disease, and socioeconomic status.     

Ancestral hierarchy and conflict

Ancestral Pan, the shared predecessor of humans, bonobos, and chimpanzees, lived in social dominance hierarchies that created conflict through individual and coalitional competition. This ancestor had male and female mediators, but individuals often reconciled independently. An evolutionary trajectory is traced from this ancestor to extant hunter-gatherers, whose coalitional behavior results in suppressed dominance and competition, except in mate competition. A territorial ancestral Pan would not have engaged in intensive warfare if we consider bonobo behavior, but modern human foragers have the potential for full-scale war. Although hunter-gatherers are able to resolve conflicts preemptively, they also use mechanisms, such as truces and peace pacts, to mitigate conflict when the costs become too high. Today, humans retain the genetic underpinnings of both conflict and conflict management; thus, we retain the potential for both war and peace.     

手机对大学生德育工作的影响与对策探讨

从手机对大学生德育工作正反两方面的影响出发,分析了手机的使用在整合德育空间、增强德育工作的实效性及对大学生自我教育方面的积极影响,并在教育模式、教育目标上分析了手机的使用对高校德育的挑战,进而提出应在德育理念、方法、内容、测评等方面充分利用手机加强高校德育工作的新对策。     

Infants' perseverative search errors are induced by pragmatic misinterpretation

Having repeatedly retrieved an object from a location, human infants tend to search the same place even when they observe the object being hidden at another location. This perseverative error is usually explained by infants' inability to inhibit a previously rewarded search response or to recall the new location. We show that the tendency to commit this error is substantially reduced (from 81 to 41%) when the object is hidden in front of 10-month-old infants without the experimenter using the communicative cues that normally accompany object hiding in this task. We suggest that this improvement is due to an interpretive bias that normally helps infants learn from demonstrations but misleads them in the context of a hiding game. Our finding provides an alternative theoretical perspective on the nature of infants' perseverative search errors.     

The land reform in independent Estonia: Memory as precedent — Toward the reconstruction of agriculture in Eastern Europe

As literally every East European nation struggles to reformits agricultural sector, land reform in its many forms figures preeminently in strategic thinking on the problem. Estonia's historic program, instituted during the first republican period, was a highly successful reform from many perspectives. With political as well as economic goals, the reform had an important social dimension as well in that it reinvigorated entire rural regions and established a vital family farming system. The land reform's achievements owe as much to the social and human infrastructure created in Estonia as it did to changes in land tenure, land assembly, and land use. This may be one of its most important lessons for those attempting to craft a new agricultural structure for this and other nations in the region.