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171.
The development of children's rule use on the balance scale task   总被引:6,自引:0,他引:6  
Cognitive development can be characterized by a sequence of increasingly complex rules or strategies for solving problems. Our work focuses on the development of children's proportional reasoning, assessed by the balance scale task using Siegler's (1976, 1981) rule assessment methodology. We studied whether children use rules, whether children of different ages use qualitatively different rules, and whether rules are used consistently. Nonverbal balance scale problems were administered to 805 participants between 5 and 19 years of age. Latent class analyses indicate that children use rules, that children of different ages use different rules, and that both consistent and inconsistent use of rules occurs. A model for the development of reasoning about the balance scale task is proposed. The model is a restricted form of the overlapping waves model (Siegler, 1996) and predicts both discontinuous and gradual transitions between rules.  相似文献   
172.
Central pontine myelinolysis (CPM) and extrapontine myelinolysis (EPM) are well recognized syndromes related to the rapid correction of hyponatremia, which are reported to show brain stem signs and various movement disorders. Cognitive dysfunction and neuropsychological findings, however, have seldom been reported. Cognitive manifestations in osmotic myelinolysis may have been underestimated due to the prominent brain stem symptoms and movement disorders. We report a case of EPM without CPM and describe the neuropsychological findings of EPM. The absence of CPM in this case made it possible to test neuropsychological function in the acute stage. Neuropsychological testing showed severe impairment of attention, verbal and visual memory, visuospatial function, and frontal/executive function. Language and language-related functions were normal except naming.  相似文献   
173.
迄今为止,人们往往把《巴黎手稿》的异化理论归结为异化劳动.而实际上它决不仅仅指《第一手稿》中的异化劳动,还指《穆勒评注》中的交往异化.交往异化是马克思走出孤立人的自我异化逻辑,走向复杂的社会关系逻辑的关键环节,也是马克思建构社会概念以及唯物史观的前提.因此,交往异化在思想水平上高于异化劳动,《穆勒评注》在理论上也比《第一手稿》成熟,我们应该遵循《第一手稿》在前《穆勒评注》在后的文献学顺序解读《巴黎手稿》.如果说马克思在其早期思想发展过程中有一次根本性转变的话,《穆勒评注》就是这次转变的转折点.  相似文献   
174.
认知年老化与执行衰退假说   总被引:6,自引:1,他引:5  
在认知年老化领域,执行衰退假说是近年来新兴的一种理论。执行衰退假说在理论上具有很强的吸引力,但在实证研究中却存在很多困难,如执行功能的可分离性问题,执行功能测量的信度和效度问题,以及执行功能与加工速度的关系问题。目前,该领域研究的焦点是:在行为学水平上,控制一般性因素(加工速度)后,执行功能是否仍对认知年老化起重要的中介作用;在神经水平上,执行(额叶)功能随龄的变化情况,以及在认知年老化过程中,额叶在大脑功能重组中扮演的角色。最终实现对认知年老化的理解,需要将认知功能与大脑结构联系起来;既看到广泛存在的共同的基本机制,又不能忽略不同认知结构的选择性变化。  相似文献   
175.
用自然实验和实验室实验考察了对小学四年级学生进行快速阅读训练的有效性,结果发现:(1)快速阅读训练可以显著地提高小学生的有效读速;(2)快速阅读训练可以显著减少注视次数、注视点平均持续时间;(3)快速阅读训练可以显著扩大眼跳距离。  相似文献   
176.
This article reports the development of a tool for examining the social and cognitive processes of people involved in a conversational interaction. Research on how people process utterances while they are actually engaged in an interaction has been extremely rare. To that end, we have developed a conversational bot (computer program designed to mimic human communication) with which participants can chat in a format similar to instant messaging. This program allows for the recording of comprehension speed, and it can be interfaced with secondary tasks (e.g., lexical decisions) in order to examine online conversational processing. Additional research possibilities with this program are discussed.  相似文献   
177.
“The ineffable” in Wittgenstein’s Tractatus Logico-Philosophicus is an essential term that has various interpretations. It could be divided into two types, namely, positive and negative, or real and fake. The negative or fake type can be clarified by logical analysis, while the positive or real type can be understood only through philosophical critique. Both the positive and negative types consist of infinity or absoluteness, but the infinity is subject to distinctions in meaning and logic. __________ Translated from Zhexue Yanjiu 哲学研究 (Philosophical Researches), 2005, (8): 64–68  相似文献   
178.
Transactive memory system links work team characteristics and performance   总被引:2,自引:0,他引:2  
Teamwork and coordination of expertise among team members with different backgrounds are increasingly recognized as important for team effectiveness. Recently, researchers have examined how team members rely on transactive memory system (TMS; D. M. Wegner, 1987) to share their distributed knowledge and expertise. To establish the ecological validity and generality of TMS research findings, this study sampled 104 work teams from a variety of organizational settings in China and examined the relationships between team characteristics, TMS, and team performance. The results suggest that task interdependence, cooperative goal interdependence, and support for innovation are positively related to work teams' TMS and that TMS is related to team performance; moreover, structural equation analysis indicates that TMS mediates the team characteristics-performance links. Findings have implications both for team leaders to manage their work teams effectively and for team members to improve their team performance.  相似文献   
179.
Many empirical studies have shown that people's preferences are reference-dependent. Previous theoretical studies of reference-dependence assumed that the reference point was fixed and then imposed the usual assumptions of decision theory, in particular completeness of preferences. This paper gives preference foundations for additive reference-dependent utility when the reference point varies across decisions and is one of the options in the decision maker's opportunity set. This decision situation is common, for example because usually the retention of the status quo is an available option, but is difficult to handle axiomatically because it implies incompleteness of preferences. The results of this paper provide tools to extend existing theories of reference-dependent preferences, such as prospect theory, to new and empirically important decision contexts.  相似文献   
180.
视觉搜索过程中的眼跳及其机制   总被引:2,自引:0,他引:2  
该文对视觉搜索过程中的眼跳及其时间进程、神经机制及相关的理论与模型等方面研究进行了回顾。发现内外源性眼跳得到了研究者的普遍关注,对眼运动记忆、返回抑制及眼跳时间进程的研究尚存在分歧。关于眼跳的神经机制,额叶眼动区与上丘分别被认为是眼跳的关键区与指令发出者。尽管不同的眼跳理论与模型对眼跳现象给出了各自的解释,但都不尽完善,尚需对这些理论进行整合或者提出新的解释模型。文章还对未来的研究进行了展望  相似文献   
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