中文词间词和词内词预视加工的差异：词间阴影的作用

为了考察词语的属性特征对预视加工的影响, 实验操纵注视字与预视字是否属于一个语言单元, 利用眼动轨迹记录法并结合边界范式以探讨其对预视效应的影响。此外, 考察了词边界信息对词间词和词内词预视加工的影响。结果显示, 词内词的预视效应大于词间词, 词间阴影、非词阴影条件下的预视效应和正常条件之间没有差异。说明阴影提供的词边界对词间词和词内词的预视加工无影响, 支持词切分和词汇识别模型, 即词切分和词汇识别是同时进行的。     

Dissociable spatial memory systems revealed by typical and atypical human development

Rodent lesion studies have revealed the existence of two causally dissociable spatial memory systems, localized to the hippocampus and striatum that are preferentially sensitive to environmental boundaries and landmark objects, respectively. Here we test whether these two memory systems are causally dissociable in humans by examining boundary‐ and landmark‐based memory in typical and atypical development. Adults with Williams syndrome (WS)—a developmental disorder with known hippocampal abnormalities—and typical children and adults, performed a navigation task that involved learning locations relative to a boundary or a landmark object. We found that boundary‐based memory was severely impaired in WS compared to typically‐developing mental‐age matched (MA) children and chronological‐age matched (CA) adults, whereas landmark‐based memory was similar in all groups. Furthermore, landmark‐based memory matured earlier in typical development than boundary‐based memory, consistent with the idea that the WS cognitive phenotype arises from developmental arrest of late maturing cognitive systems. Together, these findings provide causal and developmental evidence for dissociable spatial memory systems in humans.     

对人类不良记忆的修饰：来自记忆再巩固的证据

已经巩固的长时记忆被再次提取后, 进入一个记忆的不稳定期, 在此过程中, 记忆可被更新、强化、削弱甚至抹除, 这个过程称为再巩固。人类不良记忆再巩固研究揭示记忆激活后口服普萘洛尔(propranolol)或进行消退训练可削弱或抹除不良情绪记忆, 此过程中涉及杏仁核、海马、前额叶皮层等脑区的参与及其构成的神经环路的调控。当前临床上利用再巩固原理可通过药物治疗、行为干预或无创脑部刺激的方法改变不良记忆。然而, 由于其形成过程复杂并受多种因素影响, 未来研究应尽可能模拟临床中人类不良记忆形成的复杂环境, 深入探讨再巩固“边界问题”, 推动实验室研究向临床应用的转化。     

事件切割：我们如何知觉并记忆日常事件?

事件切割指的是人们将连续的外界信息析解成若干个有意义且互相关联的事件的过程, 实验室中通常使用事件切割任务对其进行研究。事件切割既包含自下而上的加工过程, 也有自上而下加工的成分。事件切割活动对记忆有着重要的影响, 个体知觉事件、回忆事件的能力被认为与其日常生活紧密相关。解释事件切割加工过程和特征的理论模型主要包括情境模型、事件切割理论和事件视界模型。未来的研究可以深入探讨事件记忆在不同测试类型上的差异, 并关注事件切割过程中的注意分配过程。     

Quackademia? Mass-Media Delegitimation of Homeopathy Education

In response to concerns about the standards of training for non-medically qualified homeopathic practitioners, between 1999 and 2009 a number of UK universities taught Bachelor of Science (BSc) degrees in homeopathy. All the courses were subsequently closed following media coverage of a vigorous campaign from scientists against the degree courses. A boundary-work analysis of 65 articles published in the UK print media reveals the use of metaphors from a number of different fields as rhetorical strategies to malign homeopathy education. As well as the commonly used contrasts of profit versus academic integrity, rationality versus faith and logic versus magic, media reports associated homeopathy with new universities and Mickey Mouse degrees, both of which had been denigrated in the press previously. In the press coverage, much attention was also drawn to the fact that the method of repeatedly diluting homeopathic medicines defies both logic and common sense, and the plausibility argument became a decisive blow in the debate over the legitimacy of teaching homeopathy as a science degree. It seems that the boundary work sought to protect the authority of both science and medicine by expelling homeopathy from higher education. These findings contrast with previous studies that suggest that orthodox medicine has occasionally expanded to incorporate desirable aspects of complementary and alternative therapies. Scientists carry out boundary work not just to demarcate the boundaries of science and directly defend their own interests, but also to protect the authority of other allied professions.     

Effect of deep cryogenic treatment on carbon segregation in Cr8Mo2SiV tool steel during tempering

Carbon segregation in Cr8Mo2SiV tool steel after common heat treatment (CHT) and deep cryogenic treatment (DCT) has been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) extraction replica and three-dimensional atom probe (3DAP) tests. The XRD results show that most of the retained austenite transformed to martensite after DCT. The TEM results confirm the transformation of blocky retained austenite to twin martensite during DCT. The 3DAP results reveal the segregation of carbon atoms and the maximum carbon fraction in carbon-rich regions increases after DCT. The peak carbon concentration in carbon-rich regions of SDC99 steel after CHT and DCT are 8 at. % and 15 at. %, respectively. The segregated carbon atoms grew into nuclei for nanoscale carbides precipitation on subsequent tempering.     

高校辅导员的边界分割偏好与工作-非工作冲突:边界分割管理策略的调节作用

采用问卷调查法,对312名高校辅导员进行调查,探讨边界分割偏好、组织分割供给和个人边界分割策略与工作-非工作冲突的关系。结果表明:(1)辅导员的边界分割偏好与工作-非工作冲突正相关;(2)组织分割供给和个人边界分割策略均能减弱边界分割偏好与工作-非工作冲突之间的正相关。本研究提示高校应在不影响工作的前提下尽量向辅导员提供更多的组织分割供给,同时辅导员也可以通过灵活运用边界分割策略,进行自主的工作-非工作边界管理。     

医务人员在医疗活动中的利益边界与道德责任分析

当今是一个以利益为轴心的时代,利益伦理是医学伦理学不可忽视的课题。欲望是无穷的,利益是有限的,任何利益都有其边界和限度,我们必须设置利益的道德界限。医患双方未能遵守利益限度和利益边界原则,使矛盾转化为冲突。利益冲突不仅影响医生的专业判断,而且影响了其医疗决定。医生既是医疗职业者,也是社会的一员,社会公众利益最大化是医疗服务的基本目标,为病人最大利益着想是医护专业最根本的道德规范与责任。