语义表征具身理论:情绪在概念表征中的作用

概念如何被表征是认知科学的热点问题,其中抽象概念如何表征是当前具身认知最具争议性的话题之一。与前期概念隐喻理论(强调意象图式)和知觉符号理论(强调情境内省信息)的观点不同,语义表征具身理论强调情绪经验信息在抽象概念表征和加工中的作用。具体而言,具体概念的表征主要来自感觉运动信息,而抽象概念的表征主要来自情绪经验信息和语言信息。研究证明,抽象概念的高情绪经验信息能够促进词汇的加工,且这一促进作用受词汇情绪效价的调节。未来研究应进一步考虑影响情绪经验信息发挥作用的因素,比如语言信息的丰富性、情绪唤醒或个体的情绪状态等。     

Concepts as Semantic Pointers: A Framework and Computational Model

The reconciliation of theories of concepts based on prototypes, exemplars, and theory‐like structures is a longstanding problem in cognitive science. In response to this problem, researchers have recently tended to adopt either hybrid theories that combine various kinds of representational structure, or eliminative theories that replace concepts with a more finely grained taxonomy of mental representations. In this paper, we describe an alternative approach involving a single class of mental representations called “semantic pointers.” Semantic pointers are symbol‐like representations that result from the compression and recursive binding of perceptual, lexical, and motor representations, effectively integrating traditional connectionist and symbolic approaches. We present a computational model using semantic pointers that replicates experimental data from categorization studies involving each prior paradigm. We argue that a framework involving semantic pointers can provide a unified account of conceptual phenomena, and we compare our framework to existing alternatives in accounting for the scope, content, recursive combination, and neural implementation of concepts.     

决策信心的认知机制与神经基础

决策信心是指在进行判断或决策时, 个体对其决策最优性或正确性的信心程度。决策信心的单过程理论认为决策与信心评估是并行的同一加工过程; 而决策后理论认为决策和信心评估是串行的两个加工过程。决策信心存在两种典型的偏差效应：过分自信和信心不足。决策信心的神经机制研究指出, 信心评估可能是决策过程中最基本并且普遍存在的一个成分; 对决策信心评估敏感的脑区包括扣带回、背外侧前额叶和顶上小叶等。未来研究应该在决策信心产生的机制、信心与决策如何交互的心理及神经机制等领域展开大量研究。     

学科领域知识与数学学习的知识表征研究

根据领域知识的结构特点对初中数学学科知识作出改编和重组,形成数学学科领域知识单元进行教学实验,以215名普通初中二年级学生为被试,通过自编问卷和深度访谈考察学科领域知识对知识表征的影响,并探讨了知识表征与数学学业成绩之间的关系。研究发现:(1)学科领域知识可以显著提高学生数学陈述性知识表征全面性和总体水平;(2)学科领域知识可以显著提高学生的程序性知识表征全面性、自动化、组织性和总体水平;(3)认知结构三要素、陈述性知识表征及程序性知识表征与数学成绩显著相关;(4)学优生的陈述性知识表征准确性、总体水平和程序性知识表征组织性、总体水平显著高于中等生和学困生。     

飞行员动态空间表征建构的策略研究

运用动态视觉空间工作记忆任务探讨了飞行员和对照组的动态空间表征的建构特征。从两个方面考察策略运用:(1)在客体运动轨迹表征反应选择项上,根据客体运动轨迹的几何特征将选择项设置为整体型策略和局部型策略;(2)有关策略运用的问卷测试。结果发现,在完成运动轨迹的动态工作记忆时,飞行员更多采用整体策略,控制组更多采用局部。结果提示具有较高空间能力的飞行员在合并运动刺激元素、整合客体表征转化为整体表征时具有优势。最后提出延时动态空间表征表达运动客体运动轨迹表征,其空间构型依赖于一段时间的客体运动特性的积累。     

社会距离对他人行为表征的影响:评价内容效价的作用

心理距离的建构水平理论认为,人与人之间的亲密度具有心理距离特性(即社会距离),人们对心理上远距离的客体或事件的表征倾向于采用高水平建构,而对心理上近距离的客体或事件的表征倾向于采用低水平建构。本研究以特质性和行动性行为描述句子为实验材料,通过两个实验考察了社会距离(亲密舍友/公选课上认识的同性同学)对他人正性和负性行为评价的影响,以探讨评价内容效价对于建构水平的心理距离效应的调节作用。实验结果发现:(1)随着社会距离的延伸,被试对社会远距离他人的正性行为更倾向于高水平的特质性表征,但在负性行为上未获得明确的类似效应;(2)相对于社会远距离他人,被试对社会近距离他人正性行为和负性行为的评价分数均较高,提示人际熟悉度对他人行为的表征具有一定的调节作用。     

The colourless canvas: representation, therapeutic action and the creation of mind

Freud's initial formulations viewed psychoanalysis as working towards the rediscovery of psychic elements - thoughts, feelings, memories, wishes, etc. - that were once known - represented in the mind, articulatable, thinkable - but then disguised and/or barred from consciousness. His subsequent revisions implicated a second, more extensive category of inchoate forces that either lost or never attained psychic representation and, although motivationally active, were not fixed in meaning, symbolically embodied, attached to associational chains, etc. Following Freud's theory of representation, the author conceptualizes these latter forces as "unrepresented" or "weakly represented" mental states that make a demand upon the mind for work and require transformation into something that is represented in the psyche, if they are to be thought about or used to think with. This paper describes, discusses and presents illustrations of this transformational process (figurability),that moves intersubjectively from unrepresented or weakly represented mental states to represented mental states, from force to meaning, from the inchoate to mental order.     

Body ownership: When feeling and knowing diverge

Individuals with the peculiar disturbance of ‘overcompleteness’ experience an intense desire to amputate one of their healthy limbs, describing a sense of disownership for it (Body Integrity Identity Disorder – BIID). This condition is similar to somatoparaphrenia, the acquired delusion that one’s own limb belongs to someone else. In ten individuals with BIID, we measured skin conductance response to noxious stimuli, delivered to the accepted and non-accepted limb, touching the body part or simulating the contact (stimuli approach the body without contacting it), hypothesizing that these individuals have responses like somatoparaphrenic patients, who previously showed reduced pain anticipation, when the threat was directed to the disowned limb. We found reduced anticipatory response to stimuli approaching, but not contacting, the unwanted limb. Conversely, stimuli contacting the non-accepted body-part, induced stronger SCR than those contacting the healthy parts, suggesting that feeling of ownership is critically related to a proper processing of incoming threats.     

人类路径整合的心理机制与神经基础

路径整合是指巡航者对与自身运动有关的信息进行整合来完成巡航任务的过程。这些与自身运动有关的信息可以是内源性的,如前庭感觉、本体感觉、动作指令的信息;也可以是外源性的,如视觉流。路径整合在许多物种中存在。人类路径整合的行为实验表明,以自我为参照系的空间表征和以环境为参照系的空间表征都有可能支持路径整合。神经科学的研究则表明,海马、内嗅皮层等内侧颞叶区域和以楔前叶等顶叶区域都与人类路径整合密切相关。     

特征变化的连续性影响客体连续表征的维持

本研究采用客体回溯范式考察了特征变化的连续性对维持客体连续表征的作用。实验1和实验2分别探索了形状维度上的变化方式（不变、渐变、突变）和亮度维度上的变化方式（不变、渐变、随机变化）对客体预览利化效应的影响。在特征连续条件下（不变或渐变）,两个实验都获得了客体预览利化效应。而在特征不连续变化条件下（突变或随机变化）,该效应消失。这些结果说明特征变化的连续性同样影响客体连续表征的维持。