知觉和概念加工范式对内隐与外显记忆发展的影响

控制知觉材料的熟悉性和概念范例的典型性,以考察它们对内隐与外显记忆发展的影响。结果表明：（1）知觉内隐记忆的启动效应不存在年龄和熟悉性效应,而知觉外显记忆成绩则具有明显的年龄和熟悉性效应;（2）在概念内隐记忆任务上,典型范例的启动效应不存在年龄差异,非典型范例的启动效应则存在随年龄而增长的启动效应：无论是典型范例还是非典型范例的外显记忆成绩均随年龄增长而提高。     

Age-related differences in idea generation and selection for propositional language

Conceptual preparation mechanisms such as novel idea generation and selection from amongst competing alternatives are critical for language production and may contribute to age-related language deficits. This study investigated whether older adults show diminished idea generation and selection abilities, compared to younger adults. Twenty younger (18–35 years) and 20 older (60–80 years) adults completed two novel experimental tasks, an idea generation task and a selection task. Older participants were slower than younger participants overall on both tasks. Importantly, this difference was more pronounced for task conditions with greater demands on generation and selection. Older adults were also significantly reduced on a semantic, but not phonemic, word fluency task. Overall, the older group showed evidence of age-related decline specific to idea generation and selection ability. This has implications for the message formulation stage of propositional language decline in normal aging.     

细菌感染性疾病中的对立统一规律与Quorum Sensing系统

引起人类细菌性感染的病原菌可以分为条件致病菌和非条件致病菌,不同性质的细菌引起的感染决定了感染矛盾的特殊性,对于不同质的矛盾,只有用不同质的方法才能解决。抗生素的发明和使用为人类控制感染性疾病的同时,这种单纯的“对抗”的解决方法也引出了一些新的矛盾。因此,细菌感染矛盾的特殊性决定我们不能采用千篇一律的“对抗斗争”形式,而必须寻求一种特殊的解决方式。对QS系统的研究发现在细菌表现致病性过程中发挥重要作用,通过QS系统减弱细菌的致病性而不杀死细菌的“抗致病性药物”来治疗感染成为一种新的抗感染思路,这种“抗致病性”概念使我们抗感染的态度从与细菌“对抗”转变为“共生”,因而QS系统可以为这种特殊矛盾提供一个合理的解决方式。     

Individualism, Communitarianism and Consensus

There is a contemporary conflict between individualistic andcommunitarian conceptions of rationality. Robert Goodin describes it asa conflict between an enlightenment individualistic conception of a``sovereign artificer'' and ``a socially unencumbered self'' ascontrasted with the communitarian conception of a ``socially embeddedself'' whose identity is formed by his or her community. Should wejustify and explain rationality individualistically or socially? This isa false dilemma when consensus is reached by a model articulated byKeith Lehrer and Carl Wagner. According to this model, the consensusresults from the positive weights individuals give to others and use tocontinually average and, thus, aggregate their allocations. Aggregationconverges toward a consensus in which the social preference and theindividual preferences become identical. The truth of communitarianismis to be found in the aggregate and the truth of individualism in theaggregation. The original conflict dissolves in rational consensus.     

内隐记忆特点的新探索

从1911年Claparede发现遗忘症病人有回避条件反射记忆到Graf和Schacter于1985正式提出内隐记忆这一概念,再到内隐记忆成为认知心理学的研究焦点,研究者对内隐记忆的定义、研究方法等都进行了逐渐深入的探讨。在此基础上,内隐记忆的相关特点也日益明晰,概念性内隐记忆、知觉性内隐记忆、自动加工记忆等各亚类均具有提取自动化、年龄独立性等共同特征,但在编码、脑机制诸方面存在差异。     

ALL THE (MANY,MANY) THINGS WE KNOW: EXTENDED KNOWLEDGE*

In this paper we explore the potential bearing of the extended mind thesis—the thesis that the mind extends into the world—on epistemology. We do three things. First, we argue that the combination of the extended mind thesis and reliabilism about knowledge entails that ordinary subjects can easily come to enjoy various forms of restricted omniscience. Second, we discuss the conceptual foundations of the extended mind and knowledge debate. We suggest that the theses of extended mind and extended knowledge lead to a bifurcation with respect to the concepts of belief and knowledge. We suggest that this conceptual bifurcation supports a form of pluralism about these concepts. Third, we discuss whether something similar can be said at the metaphysical level.     

Motion and edge sensitivity in perception of object unity

Although much evidence indicates that young infants perceive unitary objects by analyzing patterns of motion, infants' abilities to perceive object unity by analyzing Gestalt properties and by integrating distinct views of an object over time are in dispute. To address these controversies, four experiments investigated adults' and infants' perception of the unity of a center-occluded, moving rod with misaligned visible edges. Both alignment information and depth information affected adults' and infants' perception of object unity in similar ways, and infants perceived object unity by integrating information about object features over time. However, infants perceived a moving, misaligned, three-dimensional object as indeterminate in its connectedness, whereas adults perceived it as connected behind the occluder. These findings indicate that the effectiveness of common motion in specifying unified surfaces across an occluder is reduced by misalignment of edges. Alignment information enhances perception of object unity either by serving directly as information for unity or by optimizing the detectability of motion-carried information for unity. In addition, young infants are able to retain information about edge orientation over short intervals in determining connectedness via a process of spatiotemporal integration.     

Thinking “Outside the Box”: Unconstrained Creative Generation in Adults with Attention Deficit Hyperactivity Disorder

Creative generation is structured around existing knowledge and task examples, yet overreliance on specific examples may limit imagination (Ward, T. B., Finke, R. A., & Smith, S. M., 1995). The constraining influence of knowledge during creative generation may be offset by conceptual expansion, a process of thinking outside traditional conceptual boundaries, which may be heightened by distractibility and mild executive dysfunction (Abraham, A., Windmann, S., Daum, I., & Güntürkün, O., 2005). The present study explored the constraining effects of knowledge in adults with Attention Deficit Hyperactivity Disorder (ADHD), a disorder characterized by impaired attention and inhibitory control (Barkley, R. A., 1997). College students with and without ADHD were compared on two creative generation measures: an alien fruit invention task that required participants to imagine fruit that might exist on another planet (Ward, T.B., 1994), and a product label invention task wherein the goal was to invent product names without using elements of task examples (Kray, L.J., Galinski, A.D. & Wong, E.M., 2006). ADHD participants created alien fruit that diverged more from Earth fruit and labels that conformed less to examples, relative to non-ADHD peers. Results suggest that adults with ADHD may be less constrained by knowledge during creative generation. Findings are discussed in terms of theoretical import and practical implications for individuals with ADHD.