Basic visual perceptual processes in children with typical development and cerebral palsy: The processing of surface,length, orientation,and position

The present study aims to assess how the processing of basic visual perceptual (VP) components (length, surface, orientation, and position) develops in typically developing (TD) children (n = 215, 4–14 years old) and adults (n = 20, 20–25 years old), and in children with cerebral palsy (CP) (n = 86, 5–14 years old) using the first four subtests of the Battery for the Evaluation of Visual Perceptual and Spatial processing in children. Experiment 1 showed that these four basic VP processes follow distinct developmental trajectories in typical development. Experiment 2 revealed that children with CP present global and persistent deficits for the processing of basic VP components when compared with TD children matched on chronological age and nonverbal reasoning abilities.     

不同词长中文句子阅读知觉广度的年老化:眼动证据

采用移动窗口范式分别探测单字词句、双字词句和混合句子阅读知觉广度的年老化模式。单字词句是完全由单字词组成的句子,双字词句是完全由双字词组成的句子,混合句的所有词由1~4个汉字组成,这些词汇的平均词长为1.5个字。结果发现：（1）老年读者在各种词长句子上的阅读知觉广度范围均是从注视字至其右侧2个汉字;（2）青年读者在各种词长句子上的阅读知觉广度为注视点左侧1个汉字到右侧3个汉字空间。由此可见,年老化促使中文读者的阅读知觉广度变小,变得更加不对称;且句子构成词汇的词长并不调节中文阅读知觉广度的年老化。     

经颅电刺激与视功能调控

经颅电刺激(Transcranial Electrical Stimulation, TES)通过电极将特定模式的低强度电流作用于大脑头皮以调控皮层活动, 是一种非侵入、无创的神经刺激方法。根据刺激电流的模式的不同, TES分为经颅直流电刺激(tDCS), 经颅交流电刺激(tACS)和经颅随机电刺激(tRNS)。TES能对视功能诸如光幻视阈值、视野、对比敏感度、视知觉运动等进行一定程度上的调控, 并且能够与传统的视觉知觉学习训练相结合以调控视觉功能。对于不同的视觉功能, 不同的TES参数和模式的调控效果有所不同。     

视知觉学习的认知与神经机制研究

知觉学习是指由于训练或经验而引起的长期稳定的知觉变化,是一种内隐性的学习。近20年来,视知觉学习的大量研究结果提示大脑皮层的各个区域,甚至包括初级感觉皮层,在成熟之后仍然具有一定的可塑性。该文根据近年来的研究进展,对视知觉学习在大脑的什么地方,什么时候,以何种方式发生等热点问题进行了探讨。研究提示,视知觉学习涉及了包括初级视皮层在内的多个大脑皮层,并且存在一种自上而下的调控机制;视知觉学习可以在不同的时间尺度上发生,快速学习之后将伴随着慢速学习;通过视知觉学习,人们对于复杂物体的表征将从高级皮层区域移向低级皮层区域,任务执行也将趋于自动化     

情绪具身观：情绪研究的新视角

情绪具身性有着广泛的理论假说与研究证据, 从情绪外周理论到面部反馈假说、躯体标记假说再到现在的情绪具身观, 都一致认为情绪是具身的。情绪具身观认为情绪是包括大脑在内的身体的情绪, 身体的解剖学结构、身体的活动方式、身体的感觉和运动体验决定了我们怎样加工情绪。相关的行为和脑机制研究均支持了情绪加工的具身性。目前关于具身情绪的理论解释主要有镜像神经元系统假说、具身模仿论和知觉符号系统理论等。作为一种新兴的理论观点, 情绪具身观为情绪研究提供了新的视角。     

从中西医结合角度探讨代谢综合征

代谢综合征的发生、发展、变化错综复杂,中医的病因病机学说有很多包括脾胃功能失常、肝失疏泄、痰浊瘀血阻滞等。由于老年人抗病能力和修复能力低下,往往同时合并多种其他病变。所以,在辨证研究上需要一个标准化的、符合实际情况的、临床可行的分型。由于目前的中医临床研究的深度和广度还不足以产生一个辨证分型的方案,所以可分期对待,在分期的基础上进一步辨证论治。治疗的重点在于纠正代谢紊乱,改善和延缓合并症的发生及发展。中医学整体调整的理念和中药中的多种成分的多重作用,有利于多因素多系统病变的防治。中药可通过不同途径和环节改善胰岛素敏感性,在防治代谢综合征方面可能有着广阔的前景。     

Neural Representations of Nondeclarative Memories

ABSTRACT— Nondeclarative learning refers to abilities characterized by a lack of awareness of what has been learned and an independence from medial temporal lobe structures that support conscious memories of facts and events. Neuroimaging approaches have been used extensively in two domains of nondeclarative learning—priming and skill learning—to investigate the neural substrates supporting performance. Recent neuroimaging studies have attempted to understand what is being learned in different tasks in order to inform psychological theories of nondeclarative memory. For example, priming may be considered a form of perceptual learning or a form of stimulus–response learning, and correlations between performance and activation patterns in different regions may suggest the nature of the brain changes that support behavior. The attainment of expertise in a skill has been characterized as greater efficiency of processing in the same neural structures that support novice performance or, alternatively, as the recruitment of additional regions. Current research suggests that, within the domains of priming and skill learning, there is much heterogeneity in the underlying brain representations and psychological theories will need to account for these variations.     

Representationalism and indeterminate perceptual content

Representationalists currently cannot explain counter-examples that involve indeterminate perceptual content, but a double content (DC) view is more promising. Four related cases of perceptual imprecision are used to outline the DC view, which also applies to imprecise photographic content. Next, inadequacies in the more standard single content (SC) view are demonstrated. The results are then generalized so as to apply to the content of any kinds of non-conventional representation. The paper continues with evidence that a DC account provides a moderate rather than extreme realist account of perception, and it concludes with an initial analysis of the failure of nomic covariance accounts of information in indeterminacy cases.

图片和汉字的激活水平及知觉干扰效应的比较

研究使用8个残缺水平下的图片及其中文名（汉字双字词）为实验材料．试图比较图片与汉字双字词识别激活水平的差异,接着比较二者产生知觉于扰效应的条件,并把二者产生知觉于扰的条件与英文单词产生知觉于扰的条件进行比较。实验一结果发现,在材料较清晰的条件下,汉字双字词的命名成绩高于图片,表明汉字双字词的激活水平不比图片低,但在材料很残缺的条件下,汉字双字词的命名成绩低于图片。实验二发现双字词和图片在没有事先学习情况下都产生知觉干扰效应,已有研究表明单个汉字无需事先学习也可以产生干扰效应,而英文单词需要事先学习。因此,图片和汉字的干扰效应与英文单词的差别跟图片、汉字的激活水平比英文单词高有关。     

亲子间家庭功能的知觉差异及其与青少年孤独感的关系

采用家庭功能评价量表（FAI）,青少年孤独感问卷,对北京和两安的1325名初高中生及其父母进行调查。结果发现：（1）在家庭功能问卷的所有维度,亲子间知觉差异显著,青少年的知觉更消极;（2）在家庭功能的所有维度,男孩与父母的知觉差异均大于女孩与父母的差异;沟通维度父子间的差异大于母予差异,冲突与和谐维度母女间的差异大于父女间的差异;（3）不同知觉差异纽青少年的孤独感差异显著,知觉差异水平与孤独感间呈线性关系;亲子阃在冲突与和谐及父母关注维度的知觉差异可以显著预测青少年的孤独感。