Group cognition,membership change,and performance: Investigating the benefits and detriments of collective knowledge

This study analyzes the effects of group membership change on group cognition and performance to determine how groups can simultaneously leverage oldtimers’ collective knowledge and a newcomer’s expertise. Our analysis focuses specifically on the interrelated effects of the two components of a transactive memory system (TMS)—TMS structure and TMS processes—to explain the cognitive mechanisms through which membership change affects group performance. Results from a laboratory study show that groups that experience partial membership change tend to rely on the TMS structure that oldtimers developed in their original group, and that doing so is ultimately detrimental to performance because it creates inefficient TMS processes. Results from a supplemental study indicate that these TMS process inefficiencies can be avoided when oldtimers are instructed to reflect upon their collective knowledge prior to task execution. We discuss the implications for managing group cognition in organizations where membership change is prevalent.     

小学教师课堂信息加工能力的研究

研究采用小学语文和数学教学录像为实验材料,以98名小学语文数学教师、其他学科教师和非教师为研究对象,运用反应时测量法探讨小学教师加工不同类型课堂信息的速度和辨别能力。结果表明:有学科教学经验的教师(语文和数学教师)在重视学科教学内容的同时,也重视课堂教学活动的组织和课堂气氛的调节;学科知识、学科教学经验和课堂教学经验对教师的课堂信息加工能力和教学专长发展有显著的影响;研究结论对提高教师课堂教学能力、教学专长以及教师培训提供了有力的实验证据。     

辩证看待浸润性乳腺癌腋窝的局部处理

用辩证的观点,论述浸润性乳腺癌腋窝处理的不同方法以及所产生的不同的结果;阐述了临床上对浸润性乳腺癌腋窝处理时经常出现的问题;并阐明坚持从实际出发,采取科学的态度,正确处理浸润性乳腺癌腋窝的观点;肯定了微创手术是一场手术革命,是传统外科学发展的必然结果,它的变革符合事物的发展规律。     

Nonparametric item response theory axioms and properties under nonlinearity and their exemplification with knowledge space theory

This paper investigates the dichotomous Mokken nonparametric item response theory (IRT) axioms and properties under incomparabilities among latent trait values and items. Generalized equivalents of the unidimensional nonparametric IRT axioms and properties are formulated for nonlinear (quasi-ordered) person and indicator spaces. It is shown that monotone likelihood ratio (MLR) for the total score variable and nonlinear latent trait implies stochastic ordering (SO) of the total score variable, but may fail to imply SO of the nonlinear latent trait. The reason for this and conditions under which the implication holds are specified, based on a new, simpler proof of the fact that in the unidimensional case MLR implies SO. The approach is applied in knowledge space theory (KST), a combinatorial test theory. This leads to a (tentative) Mokken-type nonparametric axiomatization in the currently parametric theory of knowledge spaces. The nonparametric axiomatization is compared with the assumptions of the parametric basic local independence model which is fundamental in KST. It is concluded that this paper may provide a first step toward a basis for a possible fusion of the two split directions of psychological test theories IRT and KST.     

How children make language out of gesture: morphological structure in gesture systems developed by American and Chinese deaf children

When children learn language, they apply their language-learning skills to the linguistic input they receive. But what happens if children are not exposed to input from a conventional language? Do they engage their language-learning skills nonetheless, applying them to whatever unconventional input they have? We address this question by examining gesture systems created by four American and four Chinese deaf children. The children's profound hearing losses prevented them from learning spoken language, and their hearing parents had not exposed them to sign language. Nevertheless, the children in both cultures invented gesture systems that were structured at the morphological/word level. Interestingly, the differences between the children's systems were no bigger across cultures than within cultures. The children's morphemes could not be traced to their hearing mothers' gestures; however, they were built out of forms and meanings shared with their mothers. The findings suggest that children construct morphological structure out of the input that is handed to them, even if that input is not linguistic in form.     

THE RELIGION‐SCIENCE DISCUSSION AT FORTY YEARS: “REPORTS OF MYDEATH ARE PREMATURE”

Abstract. The startling success of the religion‐science discussion in recent years calls for reflection. Have old walls been broken down, old antagonisms overcome? Have science and religion finally been reconciled? Or is all the activity just so much sound and fury signifying nothing? Postmodern equations of scientific and religious beliefs disregard a number of enduring differences that help make sense of the continuing tensions. Yet the skepticism of authors such as John Caiazza is also ungrounded. I describe five major types of approaches that are being employed in the recent literature. These methods have led to a deeper understanding of the commonalities between science and religion and have produced new productive partnerships between them.     

中国大学生第二语言知识的心理表征特征

采用启动效应的实验范式,基于不同加工水平的词汇判断任务,通过变化启动刺激与目标刺激的4个实验,考察了中国大学生第二语言知识的心理表征特征。被试为第二军医大学的学生38名。结果发现:在基于语义的范畴判断任务中,当启动刺激(英)和目标刺激(英)之间存在语义联想关系,得到了显著的启动效应(实验一);当启动刺激(英)和目标刺激(英)之间存在语音相同或相近关系,也得到了显著的启动效应(实验二);但在基于语音的词汇判断任务中,当启动刺激(英)和目标刺激(英)之间存在语义联想关系,没有得到启动效应(实验三);而当启动刺激(英)和目标刺激(英)之间存在语音相同或相近关系,得到了显著的启动效应(实验四)。这一结果表明,对于中国大学生程度的中英双语者来说,其第二语言(英语)知识的心理表征特征为:①语义联想特征和语音联想特征,符合激活扩散模型;②第二语言知识的心理表征,不仅在概念语义层有着联系,而且在词汇表征层也有相互的联系;其词汇表征层和语义概念表征层是分层表征的。     

企业组织氛围与组织隐性知识共享之关系研究

本研究旨在考察组织氛围是否与企业中隐性知识的共享存在相关。是否可以以组织氛围的高低来预测企业中隐性知识的共享程度。本研究对辽宁省沈阳市和辽阳市的8家工业企业54个部门(班组)的463名员工组成的样本进行了问卷调查。结果表明,组织氛围的不同维度与隐性知识的不同因子的共享存在相关,组织氛围的不同维度能够在一定水平上预测隐性知识不同因子上的共享程度,但也显示隐性知识的不同因子共享机制并不一致。     

初中学生类别建构中的知识效应研究

采用类别建构的实验范式,选取具有家族相似性结构的人工类别材料,考察了已有知识对初中学生类别建构的影响。实验结果表明,当类别特征能够在已有知识的基础上形成主题时,初中学生倾向于按主题建构类别,而且在主题愈突出时这种趋势愈为明显;并且,主题性质对不同领域材料的类别建构的影响是一致的。     

Who Needs Valid Moral Arguments? (Dedicated to the Memory of R.M. Chisholm, 1916–1999)

Why have so many philosophers agonised over the possibility of valid arguments from factual premises to moral conclusions? I suggest that they have done so, because of worries over a sceptical argument that has as one of its premises, `All moral knowledge must be non-inferential, or, if inferential, based on valid arguments or strong inductive arguments from factual premises'. I argue that this premise is false.