观察不同形状和颜色时眼运动的顺序性

实验使用EVM3200型眼动仪测量被试在观察四种不同形状和四种不同颜色时眼运动轨迹的特点,来研究人眼运动的顺序性。结果表明：人眼在观察不同形状和颜色时,眼运动具有时间序列和空间序列的特性;形状和颜色一样具有诱目性序列特征;眼运动凝视点受到刺激所处空间位置的明显影响;首次凝视点是研究眼运动的重要变量。     

THREE COMPARATIVE MAPS OF THE HUMAN

Abstract. This article is a response to the 1994 Star Island conference on the "Decade of the Brain" from a Jewish perspective. After a brief introduction about the logical function of models and maps, I compare and contrast three models of the human: Ezekiel's vision of the chariot in the Hebrew Scriptures, Franz Rosenzweig's geometry of the human face in Der Stern der Erlosung (the Star of Redemption), and a standard anatomical picture of the human brain. Whereas Rosenzweigs face is seen to be compatible with Ezekiel's chariot, both are seen to be radically distinct from the implicit conception of what a human being is in modern medical science. I conclude with a suggestion that the differences are to be understood in terms of their different intended functions and express my hope for some new kind of model that will incorporate the functional advantages of both.     

WHAT IS THE ROLE OF SCIENCE IN THE DIALOGUE PROPOSED BY WILLIAM KLINK?

Abstract. Klink rejects the use of ecological models in environmental decision making because their predictions cannot be tested by rigorous scientific methods. I argue that models that cannot be tested according to the rigorous standards of the physical sciences can still be considered “scientific”; they are useful (and, in practice, used) for assessing the impacts of human actions on the environment and choosing between alternative courses of action. It is, however, important to be aware of the uncertainties and to make corrections as new data and insights become available. The interplay between (1) model-based decisions and action and (2) their consequences and subsequent corrections can be regarded as a dialogue between humans and nature (or God) in the sense proposed by Klink. Klink also claims that future actions should be informed by the larger vision of theology and should not be based on science. I suggest that science has an indispensible role. The larger vision is needed to respond to the fundamental religious question: How should I live—and why? But this question cannot be answered without first addressing the fundamental scientific question: How does the world work? I suggest that responses to the first question can be formulated as visions of a future state of existence that we feel compelled to strive to realize, and that science is necessary to provide “maps of reality” needed to realize visions. I also suggest that Christian traditions can probably provide adequate visions; the crucial need is for improving our “maps of reality.”     

Reduced visual acuity is mirrored in low vision imagery

Research has examined the nature of visual imagery in normally sighted and blind subjects, but not in those with low vision. Findings with normally sighted subjects suggest that imagery involves primary visual areas of the brain. Since the plasticity of visual cortex appears to be limited in adulthood, we might expect imagery of those with adult-onset low vision to be relatively unaffected by these losses. But if visual imagery is based on recent and current experience, we would expect images of those with low vision to share some properties of impaired visual perception. We examined key parameters of mental images reported by normally sighted subjects, compared to those with early- and late-onset low vision, and with a group of subjects with restricted visual fields using an imagery questionnaire. We found evidence that those with reduced visual acuity report the imagery distances of objects to be closer than those with normal acuity and also depict objects in imagery with lower resolution than those with normal visual acuity. We also found that all low vision groups, like the normally sighted, image objects at a substantially greater distance than when asked to place them at a distance that ‘just fits’ their imagery field (overflow distance). All low vision groups, like the normally sighted, showed evidence of a limited visual field for imagery, but our group with restricted visual fields did not differ from the other groups in this respect. We conclude that imagery of those with low vision is similar to that of those with normal vision in being dependent on the size of objects or features being imaged, but that it also reflects their reduced visual acuity. We found no evidence for a dependence on imagery of age of onset or number of years of vision impairment.     

Embodying the psychological attitude: types of consciousness in the transformation of culture

It is time to reclaim C.G. Jung’s vision of psychology as the foundational science upon which all sciences and institutions would be based, and as the discipline, theory, and practice necessary for fostering humanity’s overall psychocultural development. Jung identified eight distinct ‘types’ of consciousness through which humankind engages its emerging psychological attitude. Jung’s view of psychological development as hingeing on the differentiation of function-attitudes provides the means for understanding not only ourselves and each other, but our society as well. This paper offers an example of such an analysis by focusing on the current conflict within American political culture. The goal is as lofty as it is necessary: the operationalization of Jung’s vision of psychology as the powerful influencer of human cultural evolution that it has the potential to be. The immediate goal is to instigate the first step toward this vision of Jung’s ‘complex psychology’ by stimulating conversations among Jungians about how they can foster that vision, leading them towards taking up roles as ‘citizen therapists’, actively involved in their communities in cultivating greater empathy and the withdrawal of projections in the interest of furthering ‘collective consciousness’.     

基于神经网络的黑白图形视觉识别机制模拟

物理刺激引起视觉系统的生理反应．经过大脑的信息加工而形成视觉。现有多种模型从不同角度对视觉机制进行模拟。该文利用人工神经网络技术对黑白图形识别的视觉机制加以模拟,构建了一个两层BP(back-propagatbn)神经网络模型。应用所建网络对一幅目标和背景灰度分布曲线有重叠的图像进行了成功识别．对大脑视觉加工机制作了有益的探索。     

Awareness in the crowd: Beta power and alpha phase of prestimulus oscillations predict object discrimination in visual crowding

Visual crowding is among the factors that most hamper conscious object perception. However, we currently ignore the neural states that predispose to an accurate perception within different crowding regimes. Here, we performed single-trial analyses of the electroencephalographical (EEG) oscillations, evaluating the prestimulus power and phase differences between correct and incorrect discrimination during a letter-crowding task, where irrelevant letters were placed nearby (strong crowding) or far (mid crowding) relative to the target. Results show that prestimulus alpha (8–12 Hz) power was related to target discrimination in the mid, but not in the strong, crowding condition. Importantly, accurate discrimination in the strong crowding condition was predicted by the phase of alpha and by the power of beta (13–20 Hz) oscillations. These evidence suggest that both periodic visual sampling mechanisms, reflected in the alpha phase, and network predisposition to extract local information, reflected in the beta power, predispose to object discrimination in a crowded scene.     

Computational Cognitive Neuroscience of the Visual System

ABSTRACT— Should psychologists care about functional magnetic resonance imaging (fMRI)? Within the field of visual perception, the answer to this question is an emphatic "yes." There is a long history of close interactions between psychology and neuroscience in the study of vision. In the 1980s, vision researchers developed a general framework for combining the two fields, and that framework still supports much current research. This article will briefly cover this general approach and then will illustrate how neuroimaging allows the framework to be applied to human perception. In short, fMRI can measure how information is represented in sequential stages of processing. These same representations can also be measured behaviorally. Theories of vision specify how the sequential representations participate in well-defined computations that underlie perception.     

Visions of Brazilian Scientists on Nanosciences and Nanotechnologies

This article examines the visions on nanosciences and nanotechnologies (N&N) disseminated by a group of Brazilian scientists to legitimize this emergent field of research. For this purpose we analyzed reports on N&N published by the Journal of Science, edited daily by the Brazilian Society for the Progress of Science, from 2002 to 2007, covering the period in which the main events in domestic N&N research policy took place. Our analysis shows that researchers on N&N are spreading visions of progress, efficiency and competitiveness related to the advances in this field, giving little attention to issues such as potential risks, and economic, social and ethical implications of these technologies.

大学生生命愿景、自我效能感与应对方式的关系

采用问卷法以377名大学生为被试研究了生命愿景、一般自我效能感及应对方式的关系。研究结果为:1)大学生生命愿景整体水平较高,存在着性别和年级差异,女生的生命愿景显著高于男生;大一学生显著高于大四;2)生命愿景不同水平的大学生在一般自我效能感上存在显著性差异(t=7.35,p<0.001);在积极应对与消极应对因子上有显著性差异。3)大学生生命愿景与一般自我效能感呈显著正相关,并对自我效能感具有良好的预测作用;4)大学生生命愿景与积极应对方式呈显著正相关,与消极应对方式呈显著负相关;5)大学生生命愿景通过一般自我效能感对应对方式产生间接影响。结论为生命愿景作为应对源对大学生应对校园压力发挥积极作用。