胃黏膜内pH在多脏器功能障碍综合征监测中的应用进展

组织器官微循环灌注障碍是MODS发生的重要机制,胃肠道是机体最早发生缺血的器官。胃PHi能敏感反映MODS发生过程中胃肠黏膜缺氧情况,对MODS具有预警作用。目前测定PHi方法分盐水张力计法和连续气态张力计法,效果较可靠。本文通过大量查阅文献,结合临床经验,较系统地阐述了pHi在MODS监测中的意义、原理、方法、安全性及应用前景,为及早采取措施,防治MODS提供理论依据和临床参考。     

多目标视觉追踪的现象、规律和认知加工机制

传统注意研究多基于单个注意焦点和采用静态视觉信息。由Pylyshyn(1988)提出的多目标追踪范式则基于动态场景,是研究同时追踪多个目标的容量有限的注意机制比较常用的范式。在多目标追踪基础上发展起来的多身份追踪范式中的对象带有身份信息,涉及到较复杂的认知机制,如注意、视觉工作记忆等。探讨以上两种视觉追踪的认知加工机制对真实或模拟情境中动态信息的认知加工活动有重要的理论价值和实践指导意义。     

计划缺失设计——通过有意缺失让研究更高效

缺失值是社会科学研究中非常普遍的现象。全息极大似然估计和多重插补是目前处理缺失值最有效的方法。计划缺失设计利用特殊的实验设计有意产生缺失值, 再用现代的缺失值处理方法来完成统计分析, 获得无偏的统计结果。计划缺失设计可用于横断面调查减少(或增加)问卷长度和纵向调查减少测量次数, 也可用于提高测量有效性。常用的计划缺失设计有三式设计和两种方法测量。     

多项选择题认知诊断潜能的最大化

多项选择题是认知诊断中常用的测验项目形式, 其正确答案选项和经过特殊编制的干扰项都能提供诊断信息。为了提取干扰项的信息, 需要采用不同于传统认知诊断模型的心理计量模型。分类介绍能使干扰项提供诊断信息的多项选择题编制方法, 分析这类多项选择题的认知诊断模型, 认为未来应加强干扰项编制方法和能提取干扰项信息的认知诊断模型的选择和开发等方面的研究。     

多元企业认同的身份构建及其张力调和机理

基于认同驱动的营销关系视角, 系统地探讨了基于多元企业认同的企业身份构建及其张力调和机理。具体地, 通过定性和定量相结合的方法, 首先基于社会认同理论和身份理论, 探索多元企业认同的结构; 其次, 从社会心理学和文化创新的视角, 描绘多元企业认同形成及演化过程; 最后, 探究多元企业认同的身份构建以及身份张力调和机制。在理论上将消费者-企业认同扩展到多个利益相关者与企业的认同, 探索多元企业认同的身份构建及调和过程, 揭示其背后深层作用机理。实践上为企业与客户保持长期、和谐、多赢关系提供重要依据。     

Philosophy and Science Dialogue: Mental Causation

This paper is a dialogue between Thalia Wheatley and Terence Horgan. Horgan maintains that philosophy is a broadly empirical discipline, and that philosophical theorizing about how concepts work treats certain intuitions about proper concept-usage as empirical data. He holds that the possibility of strong multiple realizability undermines the psychophysical identity theory. He holds that the concept of causation is governed by implicit contextual parameters, and that this dissolves Kim’s problem of “causal exclusion.” He holds that the concept of free will is governed by implicit contextual parameters, and that free-will attributions are often true, in typical contexts, even if determinism is true. Thalia Wheatley holds that the concept of multiple realizability hinges on the level of abstraction discussed and that neuroscientific data does not yet support multiple realizability of mental states from specific, high resolution brain states. She also holds that compatibilism redefines the concept of free will in ways that bear little resemblance to the common understanding―that of being free to choose otherwise in the moment. She maintains that this folk understanding is incompatible with the brain as a physical system and is not rescued by concepts of context and capacity.     

Developing stimulus control of young children's requests to teachers: classwide applications of multiple schedules

Children may recruit their teachers' attention at undesirably high rates or at inconvenient times. Tiger and Hanley (2004) described a multiple-schedule procedure to reduce ill-timed requests, which involved providing children with two distinct continuous signals that were correlated with periods in which teacher attention was either available or unavailable. The current study extended the application of multiple schedules by evaluating the effectiveness of the procedure when implemented by private-school teachers in 3 elementary classrooms. Following the introduction of the multiple schedules, student approaches toward their teacher were maintained during desirable periods but were minimized during undesirable periods.     

Inherent biases in decision support systems: the influence of optimistic and pessimistic DSS on choice,affect, and attitudes

This study investigates the influence of a decision aid on decision makers' model‐based choices, emotions during the use of the model, and attitudes towards the model. A time allocation decision model was biased to purposefully provide optimistic or pessimistic criterion levels, on which subjects based their allocations. The results of our experiment indicate that the degree of “optimism” and “pessimism” inherent in the decision model had a significant impact on the decision maker's choices of criterion values, with optimism leading to higher criterion level choices and pessimism to lower levels. Furthermore, compared to pessimistic models, optimistic models significantly improved the decision makers' emotional states and, to some degree, their attitudes towards the decision aid. The implications of these conscious and sub‐conscious influences on decision makers' choices, emotions, and attitudes are discussed and the need for model‐builders and users to be aware of them is highlighted. Copyright © 2007 John Wiley & Sons, Ltd.     

相关维度数量对两种结构类别学习的影响

在多重系统理论研究基础上,运用即时反馈训练范式,以大学生为被试,考查相关维度数量对基于规则和信息整合两种结构的类别学习的影响.结果表明:(1)相关维度数量是影响类别学习的重要因素,基于规则单维度结构的学习显著优于信息整合结构和基于规则双维度结构的学习,基于规则双维度结构的学习与信息整合结构的学习没有显著差异.(2)反应策略受到规则复杂性的影响,当类别结构中隐含的规则比较简单时,学习者使用规则策略;当类别结构中隐含的规则比较复杂时,学习者难以掌握规则,就会使用相似性策略.研究结果支持"难度观",而不支持多重系统理论.     

基于情绪调节模型的教师情绪劳动的中介效应探讨

本研究以Grandey的情绪调节模型为框架,通过问卷调查的方法,探讨正性情绪、负性情绪、情绪劳动以及职业倦怠之间的关系。828名中小学教师的有效数据的回归分析结果显示:基于不同情绪感受的情绪劳动对职业倦怠的影响存在差异;情绪劳动各维度既充当正负情绪均值差距(M_N-P)影响职业倦怠各维度的部分中介变量,又充当正负情绪变异系数差距(CV_N-P)影响去个性化或个人成就感的部分中介变量;表层行为、深层行为在正负情绪均值差距(M_N-P)影响去个性化之间的部分中介效应受到性别的调节。