一些传统药物为何退出“历史舞台”

一个与当前的社会热点问题——药品价格虚高问题同样重要的问题——许多安全有效的传统药物正在退出“历史舞台”的问题,应该引起社会各界的足够重视,传统药物不应被抛弃。因为人们对于传统药物的了解,无论是在药理作用上,还是在不良反应方面,都大大优于新药。     

Is the principle of minimization of secondary moments validated during various fingertip force production conditions?

During the application of fingertip forces with simultaneous flexion of the four fingers, namely index, middle, ring, and little fingers, a stable force sharing among fingers is adopted. Several studies have hypothesized that this stable force sharing is established to minimize unnecessary rotational moments (different from the main flexion moments). This principle labeled "minimization of secondary moments" is presented in the literature as a principle used by the central nervous system to solve musculoskeletal redundancy. However, this principle has only been tested with one solicited degree of freedom and in one finger posture. Our study tests this principle with various degrees of freedom solicited as secondary moments and in two different finger postures. Participants (n=6) were asked to apply a downward vertical force using their four fingers with the forearm placed in two different configurations: a "horizontal" condition (involving flexion/extension and pronation/supination at the wrist joint) and a "vertical" condition (involving flexion/extension and radial/ulnar deviation at the wrist joint). Additionally, two finger postures were tested in each forearm configuration: in the first, the distal inter-phalangeal joints (DIP) were extended and the proximal inter-phalangeal joints (PIP) highly flexed. In the second finger posture, both DIP and PIP joints were flexed. The resultant four-finger force and the relative involvement of each finger in the resultant four-finger force (force sharing) were analyzed. Results showed that the finger postures did not influence the finger force sharing, showing that the minimization of the secondary moment principle was stable among the finger joint angle configurations. Nonetheless, the relative involvement of each finger was dependent on the secondary degree of freedom solicited (pronation/supination vs. radial/ulnar). The modifications of the finger force sharing between the "horizontal" and "vertical" conditions were in accordance with the principle of minimization of the secondary moments.     

Encroachments on State Sovereignty: The Argumentation Strategies of the George W. Bush Administration

As the world has increasingly embraced globalization, temptations to encroach on traditional boundaries of state sovereignty for reasons of self-interest mount. Argumentation studies provide an important lens for examining the public discourse used to justify such moves. This essay examines the Bush administration’s strategic use of the definitional processes of association and dissociation to build its public case for regime change in Afghanistan. After exploring how the Bush administration’s early rhetoric after 9/11 failed to actually provide the Taliban a choice to remain in power, the essay reveals three combinations of the terrorism/state relationship that functioned as an argument by definition to gain support for the US campaign to overthrow the regime.     

应用内隐联想测验的内隐社会认知研究新进展

内隐联想测验是一种新的社会认知研究方法,在内隐社会认知研究中得到广泛应用。近年来,国内外研究者应用内隐联想测验在对内隐刻板印象、内隐态度、内隐自尊以及内隐攻击性的研究中取得了新的进展。对内隐联想测验本身存在问题的研究推动了它在内隐社会认知研究领域内的进一步发展及应用。     

特征关联的类别间面孔适应

研究通过系列实验探讨了面孔适应不仅仅发生在形状选择性上, 也能发生在任务相关的特征上有内在关联的两个不同类别的物体间。实验1以带有明显性别倾向的物品图片作为适应刺激, 让被试对男女之间morphing程度不同的图片面孔进行性别辨别, 考察了不同适应刺激呈现时间的类别间面孔适应。结果表明适应刺激呈现时间大于50 ms时均存在类别间面孔适应效应。实验2评估了“性别”这一特征以及适应刺激形式在类别间面孔适应中所起的作用, 结果发现带有性别倾向的物品图片、相应的物品名称和性别文字(“男性”、“女性”) 3种适应刺激类型均能产生类别间适应。实验3通过操纵适应刺激上的注意负荷(高负荷、低负荷和无负荷), 探究了注意对类别间面孔适应的影响。结果表明随着注意负荷的增加, 类别间面孔适应效应减小。3个实验报告了一个新异的类别间适应后效, 证明了适应也能发生于在任务相关特征上有内在关联的两个不同类别的物体间。     

大学生心中父亲形象的结构分析

通过对当代大学生心目中“父亲”的概念表征进行研究,采用字词联想法进行数据收集,以父亲形象为刺激,让231名被试进行自由联想,选出前43个联想频率在4.7%以上的高频词语（概念）作为分析单位,做成卡片。另请100名被试进行分类,然后根据它们之间的关系亲疏程度实施系统聚类分析。结果发现,“父亲”概念在大学生的心目中可以从以下4个方面进行表征: (1)“依靠性”;(2)“情义性”;(3)“自律性”;(4)“阳光性”。     

自发性自传体记忆：功能、特征及其理论解释

自发性自传体记忆是个体在日常生活中对自身经历的突发性回忆。作为一种普遍的基本记忆方式, 它具有指导功能和自我功能。与自觉性自传体记忆相比, 其特征是：提取方式为基于联想、自下而上加工的直接提取过程, 内容上更倾向于积极情绪事件且复述频率较低, 性质上更具体。相应的解释理论有情景记忆回想理论、线索-启动理论、直接提取理论及概念联想理论。未来研究应注意功能验证、研究系统化、理论整合与跨文化等问题。     

心理疾病内隐污名：来自单类内隐联想测验的证据

以61名大学生为被试,采用三个独立的单类内隐联想测验（SC-IAT）考察心理疾病内隐污名的构成及其内隐效应。结果发现：（1）在认知评价、情感反应、行为倾向及其三者合并的4个SC-IATs中,被试在相容任务上的反应时均显著快于不相容任务;（2）总的SC-IAT和三个独立SC-IAT的内隐效应显著;（3）65.27%的被试的内隐效应值大于0,表现出对心理疾病患者负面的内隐态度;（4）研究采用的心理疾病内隐污名SC-IAT具有较好的信、效度指标。研究表明,被试倾向于将心理疾病与消极词联结在一起,心理疾病污名的内隐效应显著;心理疾病内隐污名包括自动化的负面认知、消极情感反应和歧视倾向。     

关联规则方法在心理测量中的应用

探讨了当相关系数对变量之间相关程度不易进行度量或者无法度量的情况下,是否可以采用关联规则方法来考察变量之间的相互关系。从理论上分析了关联规则方法在心理测量中应用的可能性,并运用Apriori算法挖掘频繁项集,对来华留学生跨文化适应性数据进行了分析,将关联规则方法分析结果与Pearson相关、Spearman相关结果进行比较,发现当使用关联规则方法进行相互关系分析时,能够更加简易、有效地获得变量间的相关规则。研究结果表明关联规则方法可以获得变量各个水平具体的支持度和置信度,推导出多变量之间的相关规则,并且对于处理非线性的多变量以及多分类变量的相关是非常有用的方法。     

错误记忆影响因素的实验研究

本研究采用DRM范式,考察了关联性、学习程度和时间间隔对错误记忆的影响,结果表明:(1)低学习程度和中学习程度下的再认错误率显著高于高学习程度下的再认错误率,说明错误记忆随着学习程度的增加而降低;(2)低关联程度下的再认错误率显著低于中关联程度和高关联程度下的再认错误率,说明关联性高低是引发错误记忆的重要变量;(3)时间间隔对错误再认率没有影响,说明错误记忆不具有时间上的衰退效应,一旦产生后极其顽固,不容易消退,可能更多地受无意识加工的影响。实验结果揭示了错误记忆与真实记忆之间存在着较为复杂的关系。真实记忆可能是错误记忆的根源,而二者的关系在不同影响因素条件下则既有共变又有分离。