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.     

知觉或记忆条件下对连续变化刺激的相似判断

控制不同材料(图形和字母)的大小、位置和长宽比连续变化,在标准和待判断刺激同时(知觉任务)或相继呈现(记忆任务)两种条件下进行相似判断的实验研究。结论为(1)任务方式对图形的相似判断有非常显著的影响;(2)知觉任务中相似判断的反应时非常显著地长于记忆任务中的反应时;(3)对材料各种特征的相似判断和加工速度差异非常显著．某些特征在相似表征中有较重要的作用。     

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。     

Media Violence and Social Neuroscience: New Questions and New Opportunities

ABSTRACT— Decades of research have demonstrated that exposure to violence on television can cause increases in aggression. The recent emergence of violent video games has raised new questions regarding the effects of violent media. The General Aggression Model (GAM) predicts that exposure to violent media increases aggressive behavior through one of three primary pathways (arousal, cognitions, and affect). Past psychophysiological research has supported GAM but has been limited to examining arousal-related variables. Recent advances in social neuroscience have opened the door to investigations of exposure to violent media on cognitive and affective components and their neurocognitive underpinnings. Neuroscience tools have the potential to provide answers to the new questions posed by recent advances in media technology.     

Can we still stand by words? or: Why rhetoric needs A pragmatic turn

Rhetorical theory has developed powerful criticisms of pretentions to objectivity, in the spirit of deconstruction and ideology critique. These critiques contain nihilistic tendencies when they become abstracted from the interactive social contexts upon which they depend for their own significance and efficacy. With a rich analysis of the social bases of communication sustained by its commitment to the project of deliberative democracy, the classic Pragmatism of John Dewey and G. H. Mead can provide an important corrective by orienting rhetorical theory toward reflective social-political engagement.     

Self-reported change in health behaviour after a mass media-based health education campaign

A comprehensive short-term fund-raising campaign, was launched in 1987 by a health charity organization in cooperation with the only Norwegian TV-channel covering the whole country. The campaign which was extensively announced on TV and other media and which involved large proportions of the population, finished up with a six hour TV-show on the fund-raising day. Because a considerable amount of information on prevention of heart disease was presented in connection with the campaign, it is presently evaluated as a nationwide health education campaign. Twenty-two per cent of the population reported changes in one or more habits in connection with the campaign (one third of them took more exercise, while one quarter reduced/quit their smoking). Health behaviour change among family/friends, reported new knowledge of health and worry created by the campaign, were the factors most clearly associated with self-reported behaviour change. The paper discusses the magnitude of the effects of the campaign in relation to the study design, and the importance of social environment and fear arousal on health behaviour.     

Absence of perceptual segmentation in image generation by normals

We used kanji characters (Chinese ideographic characters) and hiragana characters (Japanese phonographic characters) in the transfer‐appropriate processing paradigm to examine whether or not people without brain damage conduct perceptual segmentation while generating a visual mental image. Ninety‐six participants were divided into three study conditions: (a) seeing hiragana characters and generating a mental image of the corresponding kanji characters; (b) seeing the kanji characters; and (c) seeing the hiragana characters without generating the image of the kanji characters. Generating an image of a kanji character did not transfer at test to the decision as to whether the visually presented kanji character was vertically segmented or not, whereas it did transfer to a semantic decision as to whether the kanji character had a concrete or abstract meaning. Seeing a kanji character transferred to both decisions. Seeing hiragana characters without generating an image of the kanji characters transferred to neither decision. These results suggest that perceptual segmentation is not routinely conducted by normals in the process of image generation.     

中文读写能力及其相关因素研究

使用5点量表,本研究在北京地区调查了2187名小学一、三、五年级儿童的中文读写能力及其相关因素。因素分析抽取了8个因素：书面语意义理解、基本知觉能力、书写技能、家庭阅读背景、动作技能、口语能力、朗读和听写、书面表达。对上述因素进行多元逐步回归分析发现,各种读写能力内部相关显著。基本知觉能力、口语能力、家庭阅读背景和动作技能分别对中文读写能力的不同成分有显著解释作用。这个结果对于理解阅读能力发展及其与家庭阅读背景、口语、基本知觉一动作能力之间的关系,以及阅读障碍的内在机制具有重要的理论意义。     

When Walking Makes Perception Better

ABSTRACT— When we move, the visual world moves toward us. That is, self-motion normally produces visual signals (flow) that tell us about our own motion. But these signals are distorted by our motion: Visual flow actually appears slower while we are moving than it does when we are stationary and our surroundings move past us. Although for many years these kinds of distortions have been interpreted as a suppression of flow to promote the perception of a stable world, current research has shown that these shifts in perceived visual speed may have an important function in measuring our own self-motion. Specifically, by slowing down the apparent rate of visual flow during self-motion, our visual system is able to perceive differences between actual and expected flow more precisely. This is useful in the control of action.