英语语法规则获得与迁移的智力技能研究

选取451名高中生为被试,以强调句型语法为研究内容,采取教师教学、产生式规则和专家思维编制的实验材料,探讨了英语语法规则获得早、中期阶段促进规则获得的手段。在前面实验的基础上,选取298名高中生,以定语从句为研究内容,运用产生式规则、专家思维和练习编制的不同学习材料,采取随机区组设计,探讨了英语语法规则获得后期阶段的智力技能研究。通过研究得到如下结论：在语法规则获得的早中期阶段,产生式样例有助于学生智力技能的获得,同时也有助于所获得技能的迁移;在智力技能获得的后期阶段,专家样例有利于学生形成专家头脑中的图式,有助于学生实现有关智力技能的自动化。     

Relationship between nicotinic receptors and cognitive function in early Alzheimer's disease: a 2-[18F]fluoro-A-85380 PET study

Neuronal nicotinic acetylcholine receptors (nAChRs) are critical for higher order cognitive processes. Post-mortem studies suggest reductions in nAChRs (particularly the alpha(4)beta(2) subtype) with ageing and in Alzheimer's disease (AD). This study aimed to; (1) quantify nAChR distribution in vivo with 2-[18F]fluoro-A-85380 (2-FA) in 15 early AD patients compared to 14 age-matched, healthy controls (HC) and (2) correlate nAChR distribution with cognitive performance in both groups. All participants were non-smokers and underwent cognitive testing along with a dynamic PET scan after injection of 200 MBq of 2-FA. Brain regional 2-FA binding was assessed through a simplified estimation of Distribution Volume (DV(S)). The AD group differed significantly from HC on all cognitive measures employed, with impairments on measures of attention, working memory, language, executive function, visuospatial ability, verbal learning and verbal memory (p<.05). Contrary to post-mortem data this study found no evidence of in vivo nAChR loss in early AD despite significant cognitive impairment. Furthermore, no correlation between nAChR and cognitive performance was found for either group. The findings of the current study suggest preservation of nAChRs early in AD supporting previous studies. It is possible that while the clinical 2-FA PET method described here may be insensitive in detecting changes in early AD, such changes may be detected in more advanced stages of the illness.     

抽象与立象:普遍性追寻的两种道路

西方哲学在生存论上以视觉的“看”为优先,所建立的范畴(“相”)相应于“看”而更注重形式性,注重存在的“明”性(清楚明白性),通达“相”的道路则是以分离为特征的“抽象”;中国哲学在生存论上以整个人的“感”为优先,所建立的范畴(“象”)相应于“感”而更注重形式质料统一,注重世界“幽”与“明”的统一性,通达“象”的道路是“立象”、“取象”。两种通达普遍性的道路不同,所达到的“普遍性”的内涵也不尽相同。     

科学与宗教关系的几个问题

一、明确科学和宗教的涵义科学与宗教的关系历来是一个重大的话题,也是一个十分复杂的问题。长期以来,科学与宗教关系的讨论之所以分歧很大,首先在于参与讨论的主体自身的世界观和方法论存在着差异;其次,对于什么是科学,什么是宗教这些基本概念认识上和使用上也不统一。如果参与讨论者在这两个基本问题上达不成共识,讨论引发的根本分歧是不可能弥合的。在无神论学会的会议上讨论科学与宗教的关系问题,应该说在世界观和方法论上,大家基本上趋于一致。但同时也要对什么是科学,什么是宗教加以科学界定,尽可能形成共识,在此基础上才能展开深入的研究。     

Understanding print: early reading development and the contributions of home literacy experiences

This study explored the development of children's early understanding of visual and orthographic aspects of print and how this is related to early reading acquisition. A total of 474 children, ages 48 to 83 months, completed standardized measures of phonological awareness and early reading skills. They also completed experimental tasks that tapped their understanding of what constitutes "readable" print. The parents of participants completed a questionnaire regarding their children's home literacy experiences. The data showed systematic development in children's understanding of print conventions and English orthography and spelling. Regression analyses indicated that print knowledge was related to early reading skill, even after accounting for variance due to age and phonological awareness. Furthermore, parents' ratings of the extent of their children's involvement in activities that led to practice in reading and writing most consistently predicted the development of emerging literacy skills, including understanding of the conventions of the English writing system. Little relation between print knowledge and the frequency of storybook reading by adults was observed.     

Role conflict and ambiguity of CEOs in international joint ventures: a transaction cost perspective

Insights from transaction cost economics were used to study the boundary conditions underlying the role conflict and ambiguity of 265 CEOs in Chinese-based international joint ventures. Role conflict and ambiguity were lower when the contract between parents was more complete. Contract completeness fully mediated the effects of parent objective gap and parent formalization on role ambiguity but only partially so in the case of role conflict. Role conflict was lower when the foreign parent was dominant in the venture but higher when the local parent was dominant. Role conflict and ambiguity were inversely related to cultural distance. Neither construct had a detrimental effect on international joint venture performance. Implications for role theory are discussed.     

Obstructing the cascade: motivational system coactivation dampening defensive reactions to threat and disgust

ABSTRACT

This study uses the limited capacity model of motivated mediated message processing (LC4MP; Lang, 2006) as a framework to study coactivation of fundamental motivational systems elicited by common message features in antismoking public service announcements (PSAs): the appetitive system (elicited by smoking cues) and aversive system (elicited by perceived threat and disgust). Specific predictions were made for smoking cues’ ability to provide cognitive resources for message encoding when simultaneous message elements are so highly aversive they begin to deplete resources (i.e., during a defensive cascade). The results showed that greater resources were expended on encoding headlines as indicated by increased attention (i.e., gaze duration and frequency of fixation) and better free recall, but not noncue pictorial elements when smoking cues were present in PSAs high in perceived disgust. Although the inclusion of smoking cues was effective in highly aversive PSAs, results indicated that the inclusion of smoking cues reduced attention and free recall for moderately and low-aversive PSAs. Theoretical advances include the use of motivational coactivation to reduce defensive reactions and the differential allocation impact on text versus visual message elements. Applied implications highlight the importance of formative production research to ensure aversive activation is high enough to offset urges associated with smoking cues.     

The Role of Subsidies in Coordination Games with Interconnected Risk

Can subsidies promote Pareto‐optimum coordination? We found that partially subsidizing the cooperative actions for two out of six players in a laboratory coordination game usually produced better coordination and higher total social welfare with both deterministic and stochastic payoffs. Not only were the subsidized players more likely to cooperate (choose the Pareto‐optimum action), but the unsubsidized players increased their expectations on how likely others would cooperate, and they cooperated more frequently themselves. After removal of the subsidy, high levels of coordination continued in most groups with stochastic payoffs but declined in deterministic ones. This carry‐over disparity between the deterministic and stochastic settings was consistent with the economic theories that agents were more likely to keep the status quo option under uncertainty than without uncertainty. Hence, players with stochastic payoffs were more likely to keep the high coordination level (status quo) brought by the subsidy in the previous subsidy session. A post‐game survey also indicated that with stochastic payoffs, players focused on risk reduction. Temporary subsidies promoted lasting coordination because even after subsidy was removed, players still assumed that others players would prefer reduced risks from cooperation. With deterministic payoffs, however, the subsidy might crowd out other rationales for coordination, with many players indicating that the subsidy was the only reason for anyone to cooperate. Hence, the coordination level dropped when the subsidy was removed. Copyright © 2014 John Wiley & Sons, Ltd.     

员工真诚对同事关系的双刃剑效应：共事时间的调节作用

目前普遍认为员工在职场中的真诚有助于该员工与同事建立良好的关系。本研究提出员工真诚对同事关系的影响很可能积极和消极并存, 其作用效果取决于员工与同事之间的共事时间。基于社会渗透理论并整合归因的文献, 本研究认为同事怀疑和同事信任是员工真诚影响同事关系的关键中介机制。为检验本研究理论模型假设, 采用轮询问卷法(round-robin survey)和实验法分别开展两个独立调研。结果发现：在共事时间较短的情况下, 员工真诚会引发同事怀疑降低同事信任, 减少人际帮助并增加人际排斥。在共事时间较长的情况下, 员工真诚则有助于打消同事怀疑增加同事信任, 增多人际帮助并减少人际排斥。通过引入共事时间作为调节变量, 本研究发现员工真诚对同事关系的影响由消极转化为积极需要经过足够长时间的共事才能实现。     

Educational Expectations of Left-behind Children in China: Determinants and Gender Differences

Applied Research in Quality of Life - In response to the relatively low educational attainment of left-behind children in China, this article examines the determinants of educational expectations...