细胞死亡方式的新理念

起初人们认为不同细胞死亡方式之间潜在的细胞调节是不同的,然而,近来的研究显示细胞死亡的潜在机制较复杂,在一定情况下,不同细胞死亡方式之间相互联系甚至相互转化.对几种细胞死亡方式之间的区别和联系进行了回顾.有助于评价关键的细胞死亡途径,发现新的治疗干预措施.     

细胞死亡方式的新理念

起初人们认为不同细胞死亡方式之间潜在的细胞调节是不同的,然而,近来的研究显示细胞死亡的潜在机制较复杂,在一定情况下,不同细胞死亡方式之间相互联系甚至相互转化。对几种细胞死亡方式之间的区别和联系进行了回顾,有助于评价关键的细胞死亡途径,发现新的治疗干预措施。     

Theories and Theorizers: A Contextual Approach to Theories of Cognition

An undisputable characteristic of cognitive science is its enormous diversity of theories. Not surprisingly, these often belong to different paradigms that focus on different processes and levels of analysis. A related problem is that researchers of cognition frequently seem to ascribe to incompatible approaches to research, creating a Tower of Babel of cognitive knowledge. This text presents a pragmatic model of meta-theoretical analysis, a theory conceived of to examine other theories, which allows cognitive theories to be described, integrated and compared. After a brief introduction to meta-theoretical analysis in cognitive science, the dynamic and structural components of a theory are described. The analysis of conceptual mappings between components and explanation strategies is also described, as well as the processes of intra-theory generalization and inter-theory comparison. The various components of the meta-theoretical model are presented with examples of different cognitive theories, mainly focusing on two current approaches to research: The dynamical approach to cognition and the computer metaphor of mind. Finally, two potential counter arguments to the model are presented and discussed.     

动作记忆SPT优势效应的理论探讨

操作条件下的记忆效果好于语词条件下记忆效果的现象被称为动作记忆SPT效应。以往研究先后提出非策略加工、多通道加工、动作编码及情景整合理论来解释SPT效应,但这些理论解释仍存在矛盾和分歧,并阻碍了当前动作记忆领域的研究进展。为了解决目前的理论困境,本文详细地阐述了各理论的核心内容、发展历程及其存在矛盾和分歧的原因,并提出应以加工过程与加工对象相结合的视角来建立新的理论模型,以进一步促进实证研究的展开。     

Additive Theories of Rationality: A Critique

Additive theories of rationality, as I use the term, are theories that hold that an account of our capacity to reflect on perceptually‐given reasons for belief and desire‐based reasons for action can begin with an account of what it is to perceive and desire, in terms that do not presuppose any connection to the capacity to reflect on reasons, and then can add an account of the capacity for rational reflection, conceived as an independent capacity to ‘monitor’ and ‘regulate’ our believing‐on‐the‐basis‐of‐perception and our acting‐on‐the‐basis‐of‐desire. I show that a number of recent discussions of human rationality are committed to an additive approach, and I raise two difficulties for this approach, each analogous to a classic problem for Cartesian dualism. The interaction problem concerns how capacities conceived as intrinsically independent of the power of reason can interact with this power in what is intuitively the right way. The unity problem concerns how an additive theorist can explain a rational subject's entitlement to conceive of the animal whose perceptual and desiderative life he or she oversees as ‘I’ rather than ‘it’. I argue that these difficulties motivate a general skepticism about the additive approach, and I sketch an alternative, ‘transformative’ framework in which to think about the cognitive and practical capacities of a rational animal.     

Theories of the syllogism: A meta-analysis

Syllogisms are arguments about the properties of entities. They consist of 2 premises and a conclusion, which can each be in 1 of 4 "moods": All A are B, Some A are B, No A are B, and Some A are not B. Their logical analysis began with Aristotle, and their psychological investigation began over 100 years ago. This article outlines the logic of inferences about syllogisms, which includes the evaluation of the consistency of sets of assertions. It also describes the main phenomena of reasoning about properties. There are 12 extant theories of such inferences, and the article outlines each of them and describes their strengths and weaknesses. The theories are of 3 main sorts: heuristic theories that capture principles that could underlie intuitive responses, theories of deliberative reasoning based on formal rules of inference akin to those of logic, and theories of deliberative reasoning based on set-theoretic diagrams or models. The article presents a meta-analysis of these extant theories of syllogisms using data from 6 studies. None of the 12 theories provides an adequate account, and so the article concludes with a guide-based on its qualitative and quantitative analyses-of how best to make progress toward a satisfactory theory.     

Caring for the Carers: A Note on Counseling for the Wider Impact of AIDS

AIDS (Acquired Immune Deficiency Symdrome) affects the psychological functioning not only of people with AIDS but also of those who care for them. In this article we describe the provision of counseling for voluntary curers, using personal construct counseling. Some of the problems in providing such counseling are considered.     

Theories of Individuation: A Reconsideration of Bare Particulars

The metaphysical problem of individuation requires an answer to two different but intimately related questions: 1) How are we to characterize individuality ontologically? To what ontological category or logical type does individuality belong? 2) What sort of distinction is there between the individuality and nature of an individual, e.g., a real distinction, a modal distinction, a distinction of reason, or some other distinction My purpose in this article is to clarify a bare particular account of individuation and respond to objections that have been raised against bare particulars as individuators.     

Theories and Theoria of the Atonement: A Proposal

This article traces the origins of language about ‘theories’ of the atonement in Friedrich Schleiermacher and F.C. Baur’s historicization of Protestant theology in Germany. It follows the growth and promulgation of this conceptualization as it spread to America and Great Britain in the later nineteenth century. This approach contributed to the growth and development of the doctrine and its history, while severely limiting it in important ways. I note four dangers implicit within uncritical use of ‘theory’ language in studies of the history of the doctrine of the atonement, and conclude by arguing that a more fitting approach lies in the ancient and medieval concept of theoria, or contemplation, which serves as the broader telos for appreciating the riches we have in the work of Christ, within which modest contemporary notions of theory can and should play a role.     

A One-Handed Motor Task

Meehl, P. E. Clinical vs. Statistical Prediction: A Theoretical Analysis and a Review of the Evidence. Minneapolis: Univ. Minnesota Press, 1954. Pp. 149. Reviewed by Raymond B. Cattell.     

Social Facilitation: A Test of Competing Theories1

Evaluation–apprehension and distraction–conflict have typically been treated as alternative explanations for social facilitation. The present study tested both theories under a single design. The study examined (a) whether each explanation predicted social‐facilitation performance outcomes and (b) whether combining evaluation and distraction manipulations produced even greater performance outcomes. The present study also explored whether physical presence is necessary to produce social‐facilitation effects when evaluation and distraction manipulations are already present. The study found significant facilitation effects on the simple task only in the evaluation–apprehension condition. Significant performance impairment was found for both evaluation and distraction. Combining evaluation with distraction led to greater effects only on the complex task. Furthermore, physical presence does not appear necessary to produce social‐facilitation effects.     

Implicit Theories versus the Social Construal of Ability in Self-Regulation and Performance on a Complex Task

The present experiment examined the relative impacts of implicit theories and the social construal of ability as either a fixed entity or an incremental skill on self-efficacy, affective reactions, self-set goals, and performance on a complex group-management task. It was also a novel task for participants. Participants who had an implicit theory that group-management ability is an incremental skill that can be acquired with experience developed stronger self-efficacy, maintained more positive affect, and set themselves more challenging goals across multiple trials. They also outperformed participants with a fixed-entity theory of group-management ability. Some of the motivational benefits of an incremental-skill conception were lost when the social construal of managerial ability emphasized a fixed-entity conception. However, the negative motivational effects of a fixed-entity theory of ability were not ameliorated by the social construal of managerial ability as an incremental skill. The effects of conceptions of ability were fully mediated by the self-regulatory responses of participants. The hypothesis that self-efficacy moderates the impact of ability conceptions on self-set goal challenges was not supported.