On the theoretical error bound for estimating psychometric functions

The theoretical limits to the amount of error, or the Cramer-Rao bounds, were derived for estimating psychometric functions. These theoretical error bounds were compared with the variability of psychometric functions estimated from human as well as computer-simulated observers. For the simulated observers, due to the limited efficiency of the sampling strategies, including the placement of the signals and the distribution of the trials, the variances of the estimated parameters are seven times the theoretical bound for threshold and 22 times that for slope. For the human observers, the variance is 18 times the theoretical bounds for threshold and 80 times that for slope. Therefore, a major portion of the variances (60% for threshold and 73% for slope) for the human observers is associated with factors other than sampling strategies. Further improvement of the accuracy for estimating psychometric functions will depend on not only optimizing the sampling strategy, but also better understanding the various sources of error related to the behavior of human observers.     

当今中国伦理学的现象学还原

当前我们的伦理学有时因为缺乏情感而过于客观,有时因为讲究亲情而过于主观,时常处于主客二元分裂状态.根据现象学的主客不分立场,推进中国伦理学创新,最要紧的是实现胡塞尔所期待的现象学还原.     

论马克思对康德自由概念的感性证明

自由是贯穿整个西方文化的价值目标,是主体之为主体的根据,它发展到德国古典哲学时期已经取得了巨大成果,康德和马克思的自由观就宛如德国近代自由思想的两个点:康德自由概念的核心是自由意志,并且它是纯粹理性的唯一事实,但对它的证明始终是个问题;马克思对康德的"自由"进行了感性证明。     

夫妻价值观相似性、沟通模式与婚姻质量的关系*

夫妻相似性和婚姻质量的关系一直是婚姻适应研究领域关注的重要课题,然而至今并没有得到一致的结论,而且两者间的作用机制也没有得到充分探讨。为此,从澳门选取132对夫妻,采用夫妻独立作答的方式,对他们的价值观,沟通模式和婚姻适应进行测查,以探讨夫妻价值观的相似性和差异,以及沟通在夫妻价值观相似性和婚姻质量两者关系间的作用。经t检验、阶层内相关和结构方差模型分析,结果发现:(1)夫妻在价值观方面存在相似性,其实夫妻的相似性明显多于随机配对的夫妻;也存在差异,其中丈夫比妻子更看重权力和成就;(2)丈夫报告的双方回避沟通明显多于妻子,但其报告的婚姻满意度和情感表达明显好于妻子;(3)研究不仅验证了以往研究结果,即夫妻越相似,其婚姻质量就越高,而且进一步发现这种关系通过沟通起作用。最后,研究得出结论,伴侣选择应是相似和互补结合的产物,而沟通是夫妻关系的基石。     

高中生攻击性结构对应对方式的影响

采取内隐联结测验(IAT),测得100名高中生的内隐攻击性,同时结合问卷对其外显攻击性和应对方式进行调查.结果显示:(1)内隐和外显攻击性对消极应对方式均有显著预测效应,但两者与积极应对方式无显著关系;(2)内隐攻击和外显攻击的交互项对应对方式的影响不显著.     

纵横家的外交策略及其现代意义——古代外交和谐论

纵横家是先秦时期著名的智慧群体,也是当时列国外交活动的主体。他们的有的放矢、善抓机遇、国无常友亦无常敌的思想认识以及外交活动须以国力为本的外交策略对于当前国际社会之间的交往具有重要的参考价值和启迪意义。     

On suppressing unwanted cues via randomization

In certain perceptual discrimination tasks, a change in a particular stimulus variable can be perceived as changes along multiple perceptual dimensions. If the study is primarily concerned with a particular perceptual dimension or cue, it is important that the experimenter keep the influences of the other unwanted but correlated perceptual cues under control. One way to accomplish this objective is to randomize the stimuli along the stimulus dimensions primarily associated with these unwanted cues, making them unreliable as a basis for the discrimination. This theoretical note presents a mathematical proof that a uniform randomization is the most effective way of suppressing unwanted cues.     

项目反应理论新进展：基于3PLM和GRM的混合模型

IRT中的计量模型较多,不同计量模型适合不同特点的数据资料,实际工作者应根据实际情况选择适当的IRT模型来分析数据。我国是个考试、测评大国,测评的题型丰富多样,在实际应用IRT时,一个模型往往很难反应所有数据资料本身的特点,这时可考虑应用多个IRT模型（即“混合模型”）来分析,以达到对数据的最佳拟合。本文对混合模型的思想方法及原理、参数估计的实现、以及模型性能进行了研究,发现：（1）本文自主开发的混合模型参数估计程序Mix_Tu具有较高的返真性,且与国际知名测量软件Parscale相当。（2）在“项目异常”情况下,Mix_Tu程序对参数b和c的估计受数据异常程度的影响要大于Parscale程序,而对参数a的估计受数据异常程度的影响要小于Parscale程序,而在参数theta上两个程序相当。（3）在“被试异常”情况下,Mix_Tu程序对所有参数的估计受数据异常程度的影响均要小于Parscale程序,Mix_Tu程序表现的更为稳健。     

Assessment of sensory substitution prosthesis potentialities in minimalist conditions of learning

Pattern recognition with a prosthesis substituting vision by audition was investigated. During 15 1‐hour sessions, nine blindfolded sighted subjects were trained to recognise 2D patterns by trial and error. In addition to a global assessment, recognition of pattern element nature (vertical bars, horizontal bars…), element size and element spatial arrangement were independently assessed for each pattern. Influence of experimental parameters (complexity level of patterns, exploration number of a pattern) on recognition was studied. Performances improved over sessions. As a rule, patterns element nature was less well recognised than element size and spatial arrangement. Experimental parameters influenced pattern recognition performance. Results are discussed in relation with auditory and visual perception as well as in the perspective to implement a learning protocol for future users of prosthesis. Copyright © 2006 John Wiley & Sons, Ltd.     

项目特征曲线等值的抽样误差

现在,等值越来越受到各考试测验机构及测量学研究人员的重视,特别是项目反应理论等值的优越性更使他们有了信心。然而,很多人却没有注意到被试能力分布形态可能给等值结果带来的影响效果及程度。本研究以项目反应理论两级记分模型的项目参数等值在不同被试能力分布形态下的结果差异作为重点,探讨被试抽样偏差可能给项目特征曲线等值带来的误差问题。研究结果表明,被试能力分布形态会显著地影响项目参数等值的系数,特别地,能力分布的偏态系数与等值方程的截距存在显著的线性相关关系,但能力分布形态的变化对等值方程中斜率的影响并不明显