The tilted Hermann grid illusion: 'illusory spots' versus 'phantom bands'

The Hermann grid illusion became a cause célèbre, when it was reported that small figural changes from straight to curved bars abolish the dark illusory spots. We demonstrate that this is not an all-or-none effect; rather, the visual system tolerates some tilt/curviness. We transformed straight and curved Hermann grids to rhombic Motokawa grids by gradually tilting the horizontal bars. Initially, we observed only dark illusory spots, then dark spots combined with phantom bands traversing the rhomb along the minor axis, and finally dark phantom bands only. This shows that two kinds of illusions can coexist in the same grid pattern.     

When does goal discrepancy induce compensatory effort? An application of self‐completion theory to social issues

The authors review research that applies self‐completion theory to goals targeting other people (as in the case of stereotyping and prejudice), goals that aim at the achievement of a certain social identity and goals based on the social identity. It is demonstrated that goal discrepancies lead to compensation for social as well as for non‐social goals. Based on self‐completion theory it is proposed that the identity‐relevance of the respective goal as well as the goal relevance of the subsequent task are of major importance considering the individuals’ compensation. The authors argue that the consideration of these factors advance our understanding of social phenomena.     

ROLE OF INFRASTRUCTURE NETWORKS IN SUPPORTING SOCIAL VALUES TO SUSTAIN ECONOMIC SUCCESS IN NEWLY-INDUSTRIALIZED NATIONS

Organizations are evolving into a flatter structure with fewer intermediate organizational levels. Especially, fewer middle managers are needed to relay communications up and down the hierarchy. As information technology is deployed for competitive advantage, fulfilling internal communication becomes as crucial as fulfilling external communications with suppliers and customers. Fulfilling internal communications is especially crucial because incorporation of social (organizational) values and corporate culture requires communication. As the role of communication expands, the role of information technology in promoting communication is fostering experimentation in organizing work and in management practices. For example, electronic mail promotes equality and consensus in a manner that enables participatory rather than authoritarian management. An infrastructure network is a telecommunications network that provides basic communication services on which public, e.g. government, or private organizations depend for their survival. An infrastructure network is distinguished from any ordinary communications facility because it is both pervasive and comprehensive to promote group participation. An infrastructure network is further distinguished by its robustness that allows sufficient bandwidth for substantial resource sharing. Infrastructure networks represent a vital opportunity for newly-industrialized nations in Asia. In these nations, through effective communication, social values related to the ‘group’ will produce a better payoff. This payoff would result from the momentum and partnership experience generated by recent economic success. Also, the relatively smaller size of these nations would enable easier networking. Finally, as demonstrated by their success and as a result of their smaller scale, the ability of these nations to focus on what needs to be done will ensure the wise investment of funds earned from economic success in projects that will guarantee future success. This paper recommends the development of infrastructure networks including national and local networks as well as gateways (to other national networks) and other network, e.g. data bases, resources. The involvement of all constituencies, government and education as well as the private sector, will encourage experiments with information technology in organizing work and in management practices that incorporate social values.     

加工水平对不同类型内隐记忆测试的影响

许多内隐记忆研究表明 ,加工水平影响外显记忆而不影响内隐记忆 ,这样的实验结果被一些研究者认为是外显记忆与内隐记忆系统分离的重要依据之一。实际上 ,内隐记忆研究中的加工水平问题一直存在争议 ,加工水平效应作为两类记忆系统分离的依据是不充分的。在我们的这项实验中 ,结果表明 ,加工水平影响概念样例生成这种内隐记忆测试而不影响知觉辨认测试。     

双任务并存条件下的信息提取

将短时记忆再认与长时记忆范畴判断两类不同性质的信息提取任务相并列,探讨了双任务条件下的信息提取过程是如何进行的。实验结果表明,双任务并存时,ｎｏ反应的总平均反应时不等于两种任务单独进行时各自ｎｏ反应的平均反应时之和（减去一次视觉动作反应时后）,而是与其中一个较后完成的过程的ｎｏ反应平均反应时相近。因此推断双任务并存时,信息提取过程不是完成一个再进行另一个的系列加工过程,而是二者同时平行加工的过程。     

FOK产生机制的实验研究

通过以初中生和大学生为被试的两个实验探讨了FOK（Feeling-of-Knowing即“熟知感”）的产生机制,是线索熟悉性还是靶项目的可提取性（或记忆强度）决定FOK判断的等级。识记材料为90对中文词对.分前后两部分让被试识记,前后两部分词对之间安排三种关系：①完全相同;②仅线索词相同,③完全不同,这三种关系可选成不同的靶项目记忆强度和不同的线索熟悉性.两组实验结果一致表明,FOK的等级判断的高低取决于线索熟悉程度,而不随靶项目的记忆强度而变化.     

氟哌啶醇干扰决策过程中前扣带回神经元的放电活动

运用在体多通道神经元放电同步记录技术, 观察和记录大鼠在完成T-迷宫成本效益决策任务时前扣带回神经元放电和局部场电位的变化及氟哌啶醇对此的改变, 在细胞水平上探讨前扣带回在决策中的作用以及多巴胺递质系统对决策的作用机制。结果显示, 经过一段时间的训练, 10只大鼠中有8只偏好高付出-高奖赏端, 且在选择高付出-高奖赏端时的神经元放电频率要显著高于选择低付出-低奖赏端时的频率, 同时局部场电位也呈现出事件相关性; 腹腔注射多巴胺受体拮抗剂氟哌啶醇后, 大鼠不再偏好高付出-高奖赏端, 对该端的选择显著减少, 而对低付出-低奖赏端的选择显著增加, 且神经元的放电频率和局部场电位显著降低, 神经元放电和局部场电位的特征性也消失。研究提示, 前扣带回和多巴胺在努力相关决策任务中有着至关重要的作用。