一种新的等值准则及其适用范围的探讨

受假设检验方法的启发,该文引出了一种基于项目反应理论的新等值方法——平方根等值准则。它具有一些特点：定义式中答对、答错概率同时出现而不能互相替代;极易从0—1评分模式的版本转换到多级评分版本;它可以看成是Haebara等值准则的加权形式。以等值系数估计值的误差大小为衡量标准,以Wilcoxon符号秩检验为依据,大量的Monte Carlo模拟结果显示了一种有趣的现象,即等值方法的运用范围既与项目参数估计精度有关,又与等值系数A的范围有关,但与另一个等值系数B的范围无关。当项目参数估计精度较高或中等而A取值在0.9～1.3之间,新方法往往比Stocking_Lord方法和Haebara方法的估计误差小且有显著性差异,当项目参数估计精度较低时,而A从1.0～2.0时新方法都有优越性。     

On the (in)stability of dominance hierarchies in the cichlid fish Oreochromis mossambicus

Dominance hierarchies were studied during 8 weeks in eight heterosexual captive groups of Oreochromis mossambicus at the onset of sexual maturity. Linearity was assessed for each group on a weekly basis based on the Landau's index (h) and on the procedure described by Appleby [Appleby MC (1983): Animal Behaviour 31:600–608]. Week-to-week stability of the hierarchical structures was measured using the Burk's stability index (b) and Spearman rank correlation coefficients for the ranks of fishes in consecutive weeks. The two measures of stability showed a high level of concordance but the Spearman rank correlations were more conservative in detecting cases of stability. Although most dominance structures were linear they were unstable from week to week. Dominant individuals were less likely to experience rank reversals than subordinates. Rank reversals were especially likely among hierarchical neighbors. Dominance hierarchies did not stabilize in the time span of this study. © 1996 Wiley-Liss, Inc.     

信息时代的组织范式：内部市场

1990年以来 ,一种被誉为信息时代的组织范式 ,即所谓的自由企业范式 ,受到了学术界和企业界的很大重视。自由企业范式强调非集中化管理体制 ,灵活的组织内部关系 ,以及内部市场式的经营模式。本文描述了这种组织范式的理论基础及其应用原则 ,并对其在西方国家的应用及对我国的意义作了探讨。     

Ethical Dimension of Paediatric Cochlear Implantation

In congenitally or prelingually deaf childrencochlear implantation is open to seriousethical challenge. The ethical dimension ofthis technology is closely related to both asocial standard of quality of life and to theuncertainty of the overall results of cochlearimplantation. Uncertainty with regards theacquisition of oral communicative skills.However, in the western world, available datasuggest that deafness is associated with thelowest educational level and the lowest familyincome. Notwithstanding the existence of aDeaf-World, deafness should be considered as ahandicap. Therefore, society should provide themeans for the fulfilment of a deaf child'sspecific needs.For the time being there is no definitiveanswer with regard the best way to rehabilitatea particular deaf child. Therefore,communitarian values may be acceptable. If thedeaf child parents' decide not to implant,their decision should be respected. Guardiansare entitled to determine which standard ofbest interest to use in a specificcircumstance. They are the proper judges ofwhat (re)habilitation process is best for theirdeaf child. However, most deaf children areborn to two hearing parents. Probably, theywill not be acculturated in the Deaf-World. Itfollows that cochlear implantation is awelcomed (re)habilitation technology.If auditory (re)habilitation will in the futureprovide the necessary communicative skills, inparticular oral language acquisition, customs,values and attitudes of the hearing worldshould be regarded as necessary to accomplish adeaf child's right to an open future. Ifcochlear implantation technology will provideall deaf children with the capacity to developacceptable oral communicative skills –whatever the hearing status of the family andthe cultural environment – then auditory(re)habilitation will be an ethical imperative.     

团队人格组成、团队过程对团队有效性的作用

由于团队对组织的重要性,团队有效性的研究倍受关注。通过对342个大学生短期团队完成决策任务的研究,旨在探讨团队人格组成与团队中间过程对团队有效性的作用机制。研究以自陈式问卷调查收集数据,采用层次回归与结构方程模型进行统计分析。研究结果表明：团队过程变量（协作、信念、凝聚力）在团队人格组成（外向性、宜人性、神经质）与团队有效性之间起中介作用,横断研究的I-P-O整体模型得到验证     

风险沟通与公众理性

突发风险事件所导致的恐慌,其危害程度可能远远大于风险事件本身。当灾害突然降临的时候,公众能够启动理性的程度是应对危机的重要基础。文章提出了公众理性的概念,并界定和探讨了公众理性的构成以及公众理性的干扰因素;同时,通过SARS事件,着重分析了风险沟通的性质、特点,以及风险沟通对公众理性干预的可能途径和条件;目的是为总结SARS风险危机和建立应对突发风险事件的心理系统提供理论依据,以更好地促进我国在风险沟通领域的研究与实践。     

放松训练和腹式呼吸对应激的影响

探讨腹式呼吸和放松训练对应激引起的T波幅度降低和心率升高的对抗作用。被试为 3组 38名女大学生。结果表明 :(1)放松训练和腹式呼吸均能显著促进T波幅度升高和对抗应激时T波幅度的降低 ,但腹式呼吸的效果优于放松训练。 (2 )应激会引起心率的显著上升和T波幅度的显著降低。 (3)心率不是测量放松训练和腹式呼吸效果的敏感指标。结论 :腹式呼吸和放松训练可以有效地缓解心血管系统的应激反应     

CNV测听法及其改进

有人已用伴发负变异测听(CNV-A)来测试听感受阈。本文对17例进行了CNV测试。测试音采用2000、4000H之纯音。结果表明,CNV反应阈与主观阈值之间的差值大约为-10～10dB。用2000Hz测试音,CNV-A与主观听阈的绝对值平均差及平均差分别为5.9±3.9dB和3.3±6.3dB。而用4000Hz测试音时,其CNV-A与主观听阈的绝对值平均差及平均差则分别是5.0±2.9dB和3.5±4.7dB。上述结果与Prevec(1981)报道的基本一致。表明,改进的 CNV-A是临床听力测试的有用方法。     

情境对面孔表情识别的影响

长期以来,关于面孔表情识别的研究主要是围绕着面孔本身的结构特征来进行的,但是近年来的研究发现,面孔表情的识别也会受到其所在的情境背景（如语言文字、身体背景、自然与社会场景等）的影响,特别是在识别表情相似的面孔时,情境对面孔表情识别的影响更大。本文首先介绍和分析了近几年关于语言文字、身体动作、自然场景和社会场景等情境影响个体对面孔表情的识别的有关研究;其次,又分析了文化背景、年龄以及焦虑程度等因素对面孔表情识别情境效应的影响;最后,强调了未来的研究应重视研究儿童被试群体、拓展情绪的类别、关注真实生活中的面孔情绪感知等。     

构建学校-家庭-社会一体化心理健康教育模式*

影响中小学生心理健康的因素包括学校、家庭和社会多个方面,但是本研究通过调查发现目前我国的中小学生心理健康教育呈现出单一化的倾向,心理健康教育的主要实施者是学校,家庭和社会在学生心理健康教育中的地位和作用没有得到充分的体现,这种状况势必会影响中小学心理健康教育的成效。本文系统阐释了建立学校-家庭-社会一体化心理健康教育模式的必要性、途径和方法,并根据实际提出了相应的对策建议。