不同注意条件下的知觉启动及其机制

采用快速命名方法探讨不同注意条件下的知觉启动效应及其机制。实验中呈现一系列颜色词,要求被试分别完成集中和分散注意任务,然后进行词命名和再认测验。在词命名任务中．实验1包括旧词、重组颜色词和新词,而在实验2中重组颜色词改为新颜色词。结果表明,在实验1中,只有在集中注意条件下,被试对旧词的命名时间明显短于重组颜色词．即表现出知觉启动效应。而在实验2的两种注意条件下,被试对旧词的命名时间均明显短于新颜色词。这提示,在不同注意条件下的学习会影响其后的颜色知觉启动,并且与词和颜色的联结捆绑有关。     

New perspectives on binding in visual working memory

How does visual working memory (WM) store the binding between different features of a visual object (like colour, orientation, and location), and does memorizing these bindings require additional resources beyond memorizing individual features? These questions have traditionally been addressed by comparing performance across different types of change detection task. More recently, experimental tasks such as analogue (cued) recall, combined with analysis methods including Bayesian hypothesis testing and formal model comparison, have shed new light on the properties of WM. A significant new perspective is that noise in neural representation limits the precision of recall, and several recent models incorporate this view to account for failures of binding in WM. We review the literature on feature binding with a focus on these new developments and discuss their implications for the interpretation of classical findings.     

Consistent inter-individual differences in susceptibility to bodily illusions

Illusory senses of ownership and agency (that the hand or effector that we see belongs to us and moves at our will, respectively) support the embodiment of prosthetic limbs, tele-operated surgical devices, and human-machine interfaces. We exposed forty-eight individuals to four different procedures known to elicit illusory ownership or agency over a fake visible rubber hand or finger. The illusory ownership or agency arising from the hand correlated with that of the finger. For both body parts, sensory stimulation across different modalities (visual with tactile or visual with kinesthetic) produced illusions of similar strength. However, the strengths of the illusions of ownership and agency were unrelated within individuals, supporting the proposal that distinct neuropsychological processes underlie these two senses. Developing training programs to enhance susceptibility to illusions of agency or ownership for people with lower natural susceptibility could broaden the usefulness of the above technologies.     

动作的主动控制感与因果关系的主动控制感：主动动作时间压缩效应的产生机制

主动动作的时间压缩效应指主动动作到动作结果之间存在时间上的主观压缩。基于动作的主动控制感和因果关系的主动控制感是该效应的两种理论解释。本文首先分别介绍动作的主动控制感和因果关系的主动控制感, 并从行为和脑机制角度提供相应的证据解释时间压缩效应的机制。同时, 本文提出了在主动动作时间压缩效应中动作的主动控制感与因果关系的主动控制感之间可能存在的序列加工和平行加工的关系。     

The amount of recent action-outcome coupling modulates the mechanisms of the intentional binding effect: A behavioral and ERP study

Our everyday interactions depend on the ability to maintain a feeling of control over our bodily actions, that is, the sense of agency. The intentional binding effect – a perceived temporal shortening between voluntary actions and sensory outcomes – has been shown to implicitly measure agency. We investigated the effect’s underlying mechanisms: prediction and retrospective inference. First, long-term and recent action-outcome coupling were compared. Second, brain activity was recorded to uncover the neural correlates of the two mechanisms. Our results show that the recent accumulation of action-outcome coupling, but not that of a long-term accumulation, is correlated with the binding effect of actions and accounts for both mechanisms. Temporal action binding was reflected in both the readiness potential and the auditory evoked potential. The results shed new light on our understanding of the influence that immediate context of an action has on its temporal binding and the neural substrate of human agency.     

The action congruency effect on the feelings of agency

Previous studies suggest that the sense of agency (SoA), the feeling of control about one’s own actions and ensuing effects is also generated during action selection processes. We investigate whether the conflict at the action selection stage induced by a supraliminal stimulus, modulates an implicit measure of SoA, namely intentional binding. Furthermore, we were interested to investigate the influence of different types of stimulus-response compatibility on SoA. To this aim we compared the influence of an automatic imitation task and a stroop-like task on intentional binding. In both tasks participants performed congruent and incongruent fingers movements (key release) in response to an external stimulus. Their movements caused an effect and participants estimated the time between their action and the ensuing effect. We found a reduced intentional binding effect in incongruent compared to congruent conditions in both tasks. The results are discussed within the theoretical framework of the fluency of action.     

Musical expertise affects the sense of agency: Intentional binding in expert pianists

Intentional Binding (IB), a subjective compression of the time interval between a voluntary action and its consequence, is an implicit measure of the sense of agency (the feeling of controlling one's own actions and their outcomes). The sense of agency is influenced by experience, e.g. learning, development, or learned contingency. The present study aimed at analyzing expertise – an expert competence acquired through experience alone – as a possible means to affect the sense of agency. We compared performance of expert pianists and non-musicians within the IB paradigm with two types of sensory outcome – a piano note and an electronic sound. Pianists showed significantly greater outcome binding and composite binding for both types of stimuli. Therefore, musical expertise might influence the sense of agency, possibly due to continuous exposure to action-outcome associations during the musical training. Additionally, such effect might extend beyond the specific expertise to the other types of auditory outcomes.     

How does culture shape our moral identity? Moral foundations in Saudi Arabia and Britain

North American measures of moral identity (MI) assume that caring and fairness are the most prototypical features of morality. Moral foundations theory describes such individualising foundations of morality as dominant in individualist cultures and binding foundations of morality as more particular to collectivist cultures. We weighed the criticism that moral identity scales are guilty of “liberal ethnocentrism” in two studies drawing on participants in the UK and Saudi Arabia. Only individualising traits were prototypical of concepts of moral people in Britain, while individualising and binding traits were both prototypical of such concepts in Saudi Arabia (Study 1, N = 160). In Study 2 (N = 539), participants completed the moral identity scale following typical instructions that referred to the prototypical traits of one of five moral foundations. Overall MI scores were lower in Britain than in Saudi Arabia, particularly when instructions described binding traits as characteristics of a moral person. Cross-cultural differences were mediated by the perceived cultural importance attributed to these traits, particularly binding traits. These results justify concerns that existing moral identity scales underestimate important cultural variation in conceptualising moral identity, but justice and caring concerns remain the best single candidates for a universal foundation of human morality.     

特征觉察器与康德的先验形式

康德主张对象必须符合主体的认识条件,即与特定的形式相符合,这与认知心理学上的特征觉察器相一致。特征觉察器是对特定的刺激物作出特定反应的高级神经元组织。康德的先验形式的问题可以用特征觉察器和特征捆绑等神经组织和神经过程来解释。特征觉察器可为审美先验形式提供生理心理基础,也可以使康德美学的主客之争得到相对缓解。     

胰岛素样生长因子结合蛋白3mRNA在肾癌中的表达

为探讨胰岛素样生长因子结合蛋白3（IGFBP-3）mRNA在肾癌（RCC）中的表达,采用半定量RT-PCR方法进行检测,检测56例RCC组织标本及56例癌旁组织标本中IGFBP-3的表达。结果显示RCC与癌旁组织之间IGFBP-3表达差异有显著性（P〈0.05）,IGFBP-3在透明细胞癌的强阳性表达,高于其他病理类型（P均〈0.05）,并与病理分级相关。因此,IGFBP-3在RCC组织中的表达具有显著性,其在肾透明细胞癌中的强阳性表达具有特异性。