基于知觉的恐惧泛化的认知神经机制

恐惧泛化是条件性恐惧反应转移到另一个相似但安全的刺激的现象。适当的恐惧泛化对人类有积极意义, 而过度的恐惧泛化则不利于个体有效地适应环境。基于知觉的恐惧泛化研究揭示了恐惧泛化的规律, 因而被广泛应用。本文首先梳理了对知觉恐惧泛化的相关研究, 介绍恐惧泛化的经典理论基础—巴普洛夫条件反射以及恐惧泛化梯度; 其次简要回顾基于多个感觉通道(即视觉、听觉、情景)的知觉恐惧泛化研究现状; 再次, 分别对海马、杏仁核、脑岛和前额叶等脑区在恐惧泛化中的作用进行回顾, 进一步总结出恐惧泛化的神经环路结构模型。最后, 简要区分了基于知觉的恐惧泛化和正在兴起的基于概念的恐惧泛化, 进而指出未来研究需要结合基于概念的恐惧泛化、区分被试对刺激的辨别力、增加恐惧刺激材料的准确性及多样化、结合激素等个体差异和多模态脑成像数据来展开。     

无边界职业生涯下职业成功的诱因与机制

职业成功(career success)作为职业生涯研究领域的一个前沿主题, 受到了理论界和实务界的广泛关注。研究主要从职业成功的概念、测量、影响因素、实施效果与作用机制等方面, 对国内外相关研究进行了系统梳理与探讨。未来研究应关注无边界职业生涯时代职业成功、开发中国组织情境下职业成功的概念和测量、基于特质激发理论视角分析职业成功的诱因、基于职业成功观分析职业成功的实施效果、探讨中国本土文化的权变作用。     

子团队利弊作用的调节机制

子团队是指在断裂带的作用之下, 团队成员在认同以及信息加工方式等方面的差异而自发形成的小群体, 因子团队广泛存在于团队之中, 因此对其利弊作用的研究受到了越来越多的关注。从子团队利弊作用出发, 即以子团队给团队运转过程带来的积极与消极作用为基础, 来研究调节子团队利弊作用的因素并提出其调节机制。最后提出未来的研究应从动态视角的结合、团队领导的介入、子团队过程的考虑、子团队距离以及社会关系等角度做进一步的探索。     

双价效应及其认知机制

任务转换时, 如果一个刺激不仅包含当前任务的特征还包含另一任务的关联特征, 这样的刺激被称为双价刺激。双价刺激能影响个体对单价刺激的加工, 使个体对后续所有单价刺激的反应减慢, 这种现象被称为双价效应(bivalency effect)。研究者发现双价效应具有一定的普遍性和稳定性。对双价效应的理论解释主要有情境捆绑说和基于经验的预测模型。双价效应的产生与额外视觉特征的提取及自上而下的认知控制调整有关, 前者主要与颞-顶联合区的激活有关, 后者主要与背侧前扣带回以及前辅助运动区的激活相关。     

Disentangling perceptual and motor components in inhibition of return

Following an abrupt onset of a peripheral stimulus (a cue), the response to a visual target is faster when the target appears at the cued position than when it appears at other positions. However, if the stimulus onset asynchrony (SOA) is longer than approximately 300 ms, the response to the target is slower at the cued position than that at other positions. This phenomenon of a longer response time to cued targets is called "inhibition of return" (IOR). Previous hypotheses propose contributions of both response inhibition and attentional inhibition at cued position to IOR, and suggest that responding to the cue can eliminate the component of response inhibition. The current study uses tasks either executing or withholding response to the cue to investigate the relative contributions of response and attention components to IOR. A condition with bilateral display of the cue is also chosen as a control condition, and eight different SOAs between 1,000 and 2,750 ms are tested. Compared to the control condition, response delay to the target at a cued position is eliminated by responding to the cue, and a response advantage to the target at an uncued position is not affected by responding to the cue. Furthermore, both response delay at a cued position and response advantage at an uncued position decrease with SOA in the time window tested in these experiments. The results reported here indicate a dominant response inhibition at a cued position and a primary attentional allocation at an uncued position for IOR. Nonsignificant perceptual/attentional suppression at a cued position is argued to be a benefit for visual detection in a changing world.     

关于安慰剂效应的研究

安慰剂效应是指由安慰剂所引起的可观察的行为.本文讨论了安慰剂效应的确切定义,安慰剂效应的强度差异,以及临床背景、患者的人格特质、安慰剂的特征和医患关系等因素对安慰剂效应的影响.目前研究者普遍认为安慰剂效应通过期待和条件作用产生.近期的一个研究热点是疼痛和帕金森氏症背景下期待引起的安慰剂效应的神经机制.     

关于社会主义科技荣辱观的若干思考

随着科学技术的发展及其日益社会化,人们的思维方式、价值观念发生了变化,一些有违科技荣辱观的问题日益凸显。它们不仅败坏学术风气,损害我国科技界声誉,而且阻碍我国科学技术的进步,影响我国科教兴国战略的实施。因此,在当前建设社会主义核心价值体系、弘扬社会主义荣辱观的形势下和过程中,加强社会主义科技荣辱观的研究和建设,既十分紧迫,又非常重要。     

QUESTIONING SCIENTIFIC FAITH IN THE LATE NINETEENTH CENTURY

The late nineteenth century was not only a time in which religious faith was questioned in light of increasing claims of natural science. It is more accurate to see the familiar Victorian crisis of faith as but one aspect of a larger historical phenomenon, one in which the methods of both religion and science came under scrutiny. Among several examinations of the status of scientific knowledge in the waning decades of the century, the treatment of the subject by the German theologian Wilhelm Herrmann and philosopher Hans Vaihinger rejected its objective nature and denied that either scientists or theologians had access to the truth of nature. Although this stance regarding the nature of science, religion, and their relationship was limited to intellectuals in German society at the time, it foreshadowed developments in our own day in which the traditional search for truth has been problematized.     

论神经语言学的兴起与发展

神经语言学是一门新兴的医学与语言学的交叉边缘学科。简要论述了该学科的起源,研究范围,主要研究方法以及在我国的研究现状,还探讨了它与神经哲学的关系和它的哲学思考。因此,神经语言学体现了现代科学各学科门类交叉的必然趋势,是当代学术研究的前沿,具有广阔的发展前景。     

限制性饮食者对食物线索的认知偏向：行为和脑机制的证据

限制饮食是为了控制体重, 长期严格地控制进食的倾向。大量研究表明相对于非限制性饮食者, 限制性饮食者对食物线索尤其是高能量或高美味食物线索存在认知偏向。这种偏向是基于一定的脑神经基础的如前额叶背内侧, 小脑等区域。未来研究应设置严格的筛选标准, 运用视觉odd-one-out和学习-再认实验范式, 重视认知神经机制的探讨, 开展中国限制性饮食者对食物线索加工的认知机制和主要影响因素模型的系统研究。