共查询到17条相似文献,搜索用时 31 毫秒
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老龄化个体出现的认知障碍在某种程度上是由于语言的认知老化所导致,因此,了解语言认知老化的具体表现、老化机制及其神经基础对于延缓语言认知老化、矫正老年痴呆有重要意义。首先基于理解和产生两个维度,分别从词汇、句子和文本三个层面分析了语言认知老化的表现,而后着重从工作记忆的角度分析了语言认知老化的认知机制,在此基础上,进一步从词汇加工、语义提取、句法分析三个方面分析了语言认知老化的神经基础,并指出半球不对称性减弱和脑区的弥散性激活是语言认知老化的主要神经表现。最后,围绕着语言认知老化的"发展进程、领域表现形式、干预矫正方法"三个必须解决的问题展开讨论,为该领域未来的发展做出理论上的铺垫。 相似文献
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抑郁反刍是指个体把注意力集中在抑郁症状以及这些症状含意的行为和想法, 包含反复思虑抑郁症状、抑郁的可能原因、以及抑郁可能引起的后果。抑郁反刍主要表现出对负性信息过度关注、认知控制缺陷以及非适应性的自我参照加工等认知特点。基于这些特点, 近期脑成像研究发现, 抑郁反刍主要与杏仁核、前额叶以及默认网络等脑区或神经网络有关。未来应在不同亚型抑郁反刍的神经机制、基因以及开发有效的干预技术与方法等方面展开深入研究。 相似文献
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说谎,作为人性的一方面,已经成为心理学、生物进化学、实验经济学等多学科的关注点。说谎会受到多种文化的谴责,说谎行为也是人们所不支持的。但是国外的研究发现,在普通人群中,不诚实行为也是普遍存在的,而且这种不诚实行为并没有影响被试诚实的自我概念。因此了解这种不诚实行为的发生、发展过程,对人们认识和识别不诚实行为,提高人际互动质量至关重要。本文从不诚实行为的发生、发展过程出发,重点介绍了不诚实行为的研究范式、认知神经机制和影响因素。并针对已有研究的不足:(1)实验结果的解释水平低;(2)变量操纵不严谨;(3)研究方法局限; 提出了可能的解决方案。 相似文献
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工作记忆的认知模型与神经机制 总被引:2,自引:0,他引:2
本文评述了工作记忆认知模型的进展,阐述工作记忆神经机制研究的基本问题。研究者在工作记忆认知模型框架下,提出了工作记忆成分结构的脑模型。根据自己的研究探索,展望进一步的研究问题,以及TMS和fMRI/ERP等脑成像技术的结合运用对工作记忆认知神经科学研究的推动。 相似文献
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乐观偏差是指人们趋向于认为好事发生在自己身上, 坏事发生在他人身上的一种心理期望(Weinstein, 1980)。乐观偏差的研究范式主要有社会比较范式、过去未来想象范式以及信息转变任务范式。运用fMRI对乐观偏差研究发现, 乐观偏差的神经机制主要涉及前喙扣带皮质和杏仁核、前额叶、多巴胺等。未来要结合社会比较和信息转变范式对乐观偏差进行测量; 研究乐观偏差认知机制的神经机制, 特别是采用ERP技术研究乐观偏差的认知机制; 同时要进一步揭示不同亚型乐观偏差的神经机制; 最后还要开展乐观偏差影响心理健康的神经机制研究。 相似文献
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拖延行为常常阻碍个人、企业和政府按时完成既定任务,妨害了人们的工作、学业以及疾病防治等方方面面。自我控制是自主减少拖延行为的主要能力,但却是一种相对有限的认知资源。探明自我控制的作用机制有助于更高效地减少拖延行为。然而,由于缺乏合适的认知机制理论和脑成像实验范式,国内外研究多从现象层面探索自我控制、拖延行为和神经指标之间的关系。研究团队提出的“时间决策模型”通过揭示人们如何做出拖延决策,为认知机制的研究和脑成像实验范式的设计提供了理论支持。基于时间决策模型中“现在做还是以后做”的决策机制,本项目拟:(1)结合横向和纵向研究,考察自我控制作用的认知机制及其稳定性;(2)开发拖延的脑成像实验范式,结合多模态MRI技术,揭示自我控制减少拖延决策的神经基础;(3)利用神经刺激技术,考察“基于自我控制脑区的神经干预”的效果及作用机制。研究成果有望为拖延行为提供更加综合的理论框架和新的干预方案。 相似文献
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羞怯指个体在社交情境下的抑制, 是个体参与社交的阻碍。近年来, 关于羞怯的认知神经科学研究增多, 学者基于元认知模型、社会适应模型、侧化脑-体情绪模型等理论, 探讨了大脑结构和功能以及几种与感知觉和注意相关的ERP成分与羞怯的关系。但当前关于羞怯认知神经科学的理论和实证研究尚处于起步阶段。基于上述提出羞怯的心理发展模型; 未来应从人格和情绪双角度研究羞怯, 并在开发研究范式的基础上, 加大羞怯认知神经机制的探讨。 相似文献
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Regret and disappointment are the two emotions that are most closely linked to decision making. This study compares the appraisal patterns of the two emotions. This is done in the context of the related negative emotions anger and sadness. The results show clear differences between regret and disappointment in this respect while replicating prior findings concerning the appraisal patterns of anger and sadness. The results are of interest for emotion researchers and decision researchers. 相似文献
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Shunmin Zhang Peiwei Liu Tingyong Feng 《Wiley Interdisciplinary Reviews: Cognitive Science》2019,10(4)
Procrastination, the voluntary and irrational delay of an intended course of action, has troubled individuals and society extensively. Various studies have been conducted to explain why people procrastinate and to explore the neural substrates of procrastination. First, research has identified many contributing factors to procrastination. Specifically, task aversiveness, future incentives, and time delay of these incentives have been confirmed as three prominent task characteristics that affect procrastination. On the other hand, self‐control and impulsivity have been identified as two most predictive traits of procrastination. After identifying contributing factors, two important theories proposed to explain procrastination by integrating these factors are reviewed. Specifically, an emotion‐regulation perspective regards procrastination as a form of self‐regulation failure that reflects giving priority to short‐term mood repair over achieving long‐term goals. However, temporal motivation theory explains why people's motivation to act increases when time approaches a deadline with time discounting effect. To further specify the cognitive mechanism underlying procrastination, this study proposes a novel theoretical model which clarifies how the motivation to act and the motivation to avoid vary differently when delaying a task, explaining why people decide not to act now but are willing to act in the future. Of note, few recent studies have investigated neural correlates of procrastination. Specifically, it was revealed that individual differences in procrastination are correlated with structural abnormalities and altered spontaneous metabolism in the parahippocampal cortex and the prefrontal cortex, which might contribute to procrastination through episodic future thinking or memory and emotion regulation, respectively. This article is categorized under:
- Economics > Individual Decision Making
- Psychology > Theory and Methods
- Psychology > Emotion and Motivation
- Psychology > Reasoning and Decision Making
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以往不作为惯性领域的研究发现, 当个体没有获得先前更优机会是源于他人或外界等不可控因素时, 个体仍会倾向于继续放弃当前次优机会, 且后悔情绪未能对此进行解释。本研究认为失望情绪适用于解释此种情况下的不作为惯性, 或可成为后悔情绪解释的有效补充。本研究通过两个实验首次探讨了失望情绪在不作为惯性产生中的作用。结果发现, 各自变量对失望情绪(体验失望和预期失望)和作为可能性均具有一致的影响力, 且预期失望在不作为惯性的产生中具有中介作用。本研究表明, 失望情绪可能也是导致不作为惯性的一个重要因素。 相似文献
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Lisanne M. Jenkins David G. Andrewes Christian L. Nicholas Katharine J. Drummond Bradford A. Moffat Pramit M. Phal Patricia Desmond 《Journal of Neuropsychology》2018,12(1):120-141
We aimed to elicit emotion in patients with surgically circumscribed lesions of the prefrontal cortex (PFC) in order to elucidate the precise functional roles in emotion processing of the discrete subregions comprising the ventromedial PFC, including the medial PFC and orbitofrontal cortex (OFC). Three components of emotional reactivity were measured: subjective experience, behaviour, and physiological response. These included measures of self‐reported emotion, observer‐rated facial expression of emotion and measurements of heart rate and heart rate variability (HRV) during film viewing, and a measure of subjective emotional change since surgery. Patients with lesions to the ventromedial PFC demonstrated significant differences compared with controls in HRV during the film clips, suggesting a shift to greater dominance of sympathetic input. In contrast, patients with lesions restricted to the OFC showed significant differences in HRV suggesting reduced sympathetic input. They also showed less facial expression of emotion during positive film clips, and reported more subjective emotional change since surgery compared with controls. This human lesion study is important for refining theoretical models of emotion processing by the ventromedial PFC, which until now have primarily been based on anatomical connectivity, animal lesion, and human functional neuroimaging research. Such theories have implications for the treatment of a wide variety of emotional disorders. 相似文献
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R. J. R. Blair E. Colledge D. G. V. Mitchell 《Journal of abnormal child psychology》2001,29(6):499-511
This study investigated the performance of boys with psychopathic tendencies and comparison boys, aged 9 to 17 years, on two tasks believed to be sensitive to amygdala and orbitofrontal cortex functioning. Fifty-one boys were divided into two groups according to the Psychopathy Screening Device (PSD, P. J. Frick & R. D. Hare, in press) and presented with two tasks. The tasks were the gambling task (A. Bechara, A. R. Damasio, H. Damasio, & S. W. Anderson, 1994) and the Intradimensional/Extradimensional (ID/ED) shift task (R. Dias, T. W. Robbins, & A. C. Roberts, 1996). The boys with psychopathic tendencies showed impaired performance on the gambling task. However, there were no group differences on the ID/ED task either for response reversal or extradimensional set shifting. The implications of these results for models of psychopathy are discussed. 相似文献