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911.
颜色突显是指在与视觉搜索任务有关的视觉显示中,采用颜色突出显示多个项目中的目标项目,从而提高视觉搜索效率的一种方法或技术。本文采用视觉搜索任务,以正确率和反应时为指标对单彩色和复杂彩色背景下不同颜色突显的视觉搜索绩效进行了研究。结果表明:(1)在单彩色背景和复杂彩色背景下,颜色突显条件视觉搜索绩效显著优于非突显条件;(2)在浅蓝或浅绿的单彩色背景下,四种颜色突显绩效中,红色突显绩效最好,紫色最差,而在随机彩色背景和复杂彩色背景下,颜色突显绩效差异并不显著;(3)在彩色背景下的颜色突显绩效会受到干扰数字的颜色的影响,其中在单色和随机彩色背景下,干扰目标颜色为黑色时的视觉搜索绩效优于干扰目标颜色为白色时的情景,而在自然彩色背景下,这种视觉搜索优势并不存在。 相似文献
912.
913.
新中国成立六十多年特别是改革开放三十多年来,社会主义革命、建设和改革取得巨大成就的关键在于开创了一条既坚持科学社会主义的基本原则,又根据我国实际和时代特征赋予其鲜明的中国特色的"中国道路".社会主义核心价值体系正是在"中国道路"不断探索、发展和完善的过程中形成的,体现了中国特色社会主义道路的本质要求,在思想和实践中引领了"中国道路"的发展. 相似文献
914.
本文立足于对索伦鄂温克人岁时仪式中火神祭祀仪式的田野调查资料,借鉴了范·杰内普和特纳的仪式研究理论及方法,从象征的角度分析了火神祭祀的仪式过程、仪式结构与秩序,从而描述仪式所表达的深层意义:有形世界与无形世界并非毫不相干,人也并不总在被动地接受神的安排,神秘甚至是危险的世界在仪式中变得可以接触。更为重要的是,对于仪式的参与者来说,一切行为都是可以解释的,而不是毫无理性地随意而为。 相似文献
915.
916.
Contextual regularities, that is, objects’ tendency to appear with certain other objects, facilitate the processing of visual scenes and confer contextually incongruent objects with a special attentional status. This study was aimed at investigating the mechanisms underlying this attentional advantage using Binocular Rivalry (BR). In two experiments, congruent and incongruent images (e.g., a man drinking from a glass vs. a man “drinking” from a hairbrush) were pitted against each other, yielding a version of BR in which two objects rival within a given scene. Incongruent objects predominated in awareness longer than congruent ones. This effect stemmed from the fact that their dominance epochs lasted longer on the average than those of congruent objects, suggesting a difficulty to disengage attention from such objects. On the other hand, no support was found for the notion that incongruent objects also attract attention. 相似文献
917.
Wei CJ Singer P Coelho J Boison D Feldon J Yee BK Chen JF 《Learning & memory (Cold Spring Harbor, N.Y.)》2011,18(7):459-474
The adenosine A(2A) receptor (A(2A)R) is highly enriched in the striatum where it is uniquely positioned to integrate dopaminergic, glutamatergic, and other signals to modulate cognition. Although previous studies support the hypothesis that A(2A)R inactivation can be pro-cognitive, analyses of A(2A)R's effects on cognitive functions have been restricted to a small subset of cognitive domains. Furthermore, the relative contribution of A(2A)Rs in distinct brain regions remains largely unknown. Here, we studied the regulation of multiple memory processes by brain region-specific populations of A(2A)Rs. Specifically, we evaluated the cognitive impacts of conditional A(2A)R deletion restricted to either the entire forebrain (i.e., cerebral cortex, hippocampus, and striatum, fb-A(2A)R KO) or to striatum alone (st-A(2A)R KO) in recognition memory, working memory, reference memory, and reversal learning. This comprehensive, comparative analysis showed for the first time that depletion of A(2A)R-dependent signaling in either the entire forebrain or striatum alone is associated with two specific phenotypes indicative of cognitive flexibility-enhanced working memory and enhanced reversal learning. These selective pro-cognitive phenotypes seemed largely attributed to inactivation of striatal A(2A)Rs as they were captured by A(2A)R deletion restricted to striatal neurons. Neither spatial reference memory acquisition nor spatial recognition memory were grossly affected, and no evidence for compensatory changes in striatal or cortical D(1), D(2), or A(1) receptor expression was found. This study provides the first direct demonstration that targeting striatal A(2A)Rs may be an effective, novel strategy to facilitate cognitive flexibility under normal and pathologic conditions. 相似文献
918.
Uriah Y. Kim 《Reviews in Religion & Theology》2011,18(2):195-200
What would our world be like if all oppositions to capitalism were to be removed? The author describes a doomsday scenario instead of everlasting plenitude if capitalists have their ways. This conclusion comes from the author's masterful discussion of political myth and analysis of the narrative of Genesis to Joshua as a political myth. The narrative of the Hexateuch constructs and at the same time punishes all sorts of rebels who oppose the theocratic state it wishes to establish. But myth is uncanny in that the rebellion hides what it fears the most, the impossibility of such a state to come true, and needs what it desires to annihilate in order to persist as an unfulfilled fantasy that powers a political movement. The author argues that some politicians in Australia and the USA are abusing the logic of the political myth of the Hexateuch in order to support their capitalistic agendas and, therefore, the Left must tell the ending of the capitalist fantasy of endless production and expansion in order to reveal its contradictions. 相似文献
919.
Pearson JM Heilbronner SR Barack DL Hayden BY Platt ML 《Trends in cognitive sciences》2011,15(4):143-151
When has the world changed enough to warrant a new approach? The answer depends on current needs, behavioral flexibility and prior knowledge about the environment. Formal approaches solve the problem by integrating the recent history of rewards, errors, uncertainty and context via Bayesian inference to detect changes in the world and alter behavioral policy. Neuronal activity in posterior cingulate cortex - a key node in the default network - is known to vary with learning, memory, reward and task engagement. We propose that these modulations reflect the underlying process of change detection and motivate subsequent shifts in behavior. 相似文献
920.
Jiang Jiang Yu Kou Fang Wang Ying Wu Yan‐Mei Li Yuan Li Yiyin Yang Hui Cao Qiuping Wu Shi‐Jie Jing Bi‐Jing Jiang La‐Mei Shen Ai‐Juan Li Zhongquan Li Wenjun Gao Chi‐Yue Chiu Ying‐Yi Hong Shih‐Chi Hsu Lin Zhang Bao‐Yan Yang Xiao‐Li Yang De‐Lei Zhao Zhimin Zou Qing‐Wang Wei Xia Chen Yu‐Fang Zhao Yi‐Jin Zhou Hong Chen Jianping Feng Xin Wang 《Asian Journal of Social Psychology》2011,14(3):207-216
A scandal can evoke public outrage when it is widely publicized and involves an individual who is perceived to have a high level of cultural representativeness. Two experiments showed that when the scandalous target's moral character was highlighted, emotional responses towards the target were least negative when the scandal was widely circulated and when the target was seen as a representative of his culture. These results suggest that when a cultural symbol is implicated in a widely‐circulated scandal, the negative emotions directed towards the scandalous individual can be alleviated when the public remains confident in his or her commitment to morality. 相似文献