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81.
Fitting and testing carroll's weighted unfolding model for preferences   总被引:1,自引:0,他引:1  
A quadratic programming algorithm is presented for fitting Carroll's weighted unfolding model for preferences to known multidimensional scale values. The algorithm can be applied directly to pairwise preferences; it permits nonnegativity constraints on subject weights; and it provides a means of testing various preference model hypotheses. While basically metric, it can be combined with Kruskal's monotone regression to fit ordinal data. Monte Carlo results show that (a) adequacy of true preference recovery depends on the number of data points and the amount of error, and (b) the proportion of data variance accounted for by the model sometimes only approximately reflects true recovery.This study is based on a doctoral dissertation submitted to the University of Illinois at Urbana-Champaign. The author wishes to thank the members of his dissertation committee—Lawrence E. Jones, Chairman, Charles Lewis, Stephen Golding, Ledyard Tucker, and Nancy Wiggins—for their helpful comments.  相似文献   
82.
The effect of sample stimulus presentation time on long-delay matching in highly practiced pigeons was investigated. The birds were found capable of above chance matching performance at a delay of 60 sec provided the sample stimulus was presented for 4 sec or longer. Matching accuracy increased as a negatively accelerated function of sample stimulus presentation time and decreased as a negatively accelerated function of time since the termination of the sample. The rate of forgetting was found to be independent of sample stimulus presentation time. The data were inconsistent with a temporal discrimination interpretation of the effect of presentation time on delayed matching. The data were interpreted as supporting a simple trace strength and decay model of pigeon delayed matching.  相似文献   
83.
Data consisting of 79 cognitive measures from Project TALENT for 100,000 white and black high school students have been analyzed for possible race by sex interactions. Control variables included geographical area, grade in high school, and socio-economic class. Race by sex interactions are largest when socioeconomic class is controlled and are highly related to the size of the main effect of sex as well. White boys and girls differ more than black boys and girls whether the overall sex difference favors males or females. Sex by grade and, to a lesser extent, sex by area interactions were also moderately large and consistent with the size of the main effect of sex. Since there are no consistent relationships with other main effects, and since the measures producing sex differences also tend to produce the interactions, it is concluded that sex differences and the interactions with sex share the same causes. Differences between these results and those of Jensen are also discussed.  相似文献   
84.
The language development of three 9- and 10-year-old children possessing only a right or a left hemisphere was studied. Surgical removal of one brain half antedated the beginning of speech, so each child has acquired speech and language with only one hemisphere. Different configurations of language skill have developed in the two isolated hemispheres: phonemic and semantic abilities are similarly developed but syntactic competence has been asymmetrically acquired. In relation to the left, the right brain half is deficient in understanding auditory language, especially when meaning is conveyed by syntactic diversity; detecting and correcting errors of surface syntactic structure; repeating stylistically permuted sentences; producing tag questions which match the grammatical features of a heard statement; determining sentence implication; integrating semantic and syntactic information to replace missing pronouns; and performing judgments of word interrelationships in sentences. Language development in an isolated right hemisphere, even under seizure-free conditions, results in incomplete language acquisition.  相似文献   
85.
周慧 《现代哲学》2006,(2):59-65
该文试图考察福柯的自律的话语理论并反思考古学的症结。文章从“历史先天”这一关键词出发,阐述福柯的知识考古学如何将对话语的实证描述和探索话语构成的先天规则结合起来,从而保证其在对话语的形式分析的同时,超越传统哲学深陷其中的三对矛盾:“经验-先验”、“我思-未思”、“本源的隐退-回归”。围绕着“陈述”的三个特性,我们可以看到福柯为此所做的努力,即打通共时与历时之隔,经验与先验之分,实现结构主义和实证主义的联姻。文章最后指出这种自律的话语理论的症结所在,认为福柯并没有如愿以偿地跳出“有限性解析”的窠臼。  相似文献   
86.
选取130名学前儿童,采用“找钱币”欺骗任务和标准误信念任务,研究学前儿童欺骗及欺骗策略的发生、发展。结果发现:随年龄增长,采用“破坏证据”和“说谎”欺骗策略的人数呈下降趋势,采用四种联合策略的人数则呈上升趋势;即使3岁儿童也能出示“破坏证据”和“说谎”这两种行为主义的欺骗策略,但“制造虚假痕迹”的心理主义欺骗策略在4岁以后才开始出现;3岁、6岁儿童的误信念理解与欺骗策略不相关,而4岁和5岁儿童的则相关。  相似文献   
87.
冯源  苏彦捷  张莉 《心理科学》2006,29(3):757-760
关于人性善恶的问题一直有争议,本文从行为实验的角度对这一问题进行探讨。结果发现:3岁以前的儿童表现出人之初性本善的特征,对他人比较宽厚;3岁到4岁之间随着心理理论的增长,表现出道德水平下降,心理理论和道德水平两者之间出现交互作用。5岁以后的儿童由于心理理论的逐步完善,显现出越来越明确的“镜子行为”,即:谁对我好,我就对谁好;谁对我不好,我就对谁不好;原有的善性被外界恶性刺激掩蔽。  相似文献   
88.
关于条件推理的ERP研究   总被引:1,自引:0,他引:1  
以抽象的条件命题作为实验材料,测定13名大学生在完成MP、AC、DA、MT推理(推测判断任务)和基线任务(记忆判断任务)时的事件相关电位(ERP),初步探讨不同推理类型的脑内时程动态变化。这是使用ERP技术来研究条件推理脑机制的初步尝试。结果发现,五种任务所诱发的ERP早成分均不存在显著差异,在头皮前部的左外侧额区和左颞区,MP与DA推理与基线任务相比,均诱发一个更明显的晚期正成分(450-1100ms),在右外侧额区则诱发一个更明显的晚期负成分(450~1100ms);与之相反,MT与AC推理与基线任务相比,在左侧诱发一个更明显的晚期负成分(450~1100ms),在右侧诱发一个更明显的晚期正成分(450~1100ms),这一结果可能是由于左右脑在推理中的认知功能以及四种推理类型之间存在的差异所致,同时也表明推测过程主要激活了左右侧的前额部、颞叶等区域,基本支持Goel等人的双加工理论  相似文献   
89.
聋童执行功能发展:聋童与正常儿童的比较   总被引:6,自引:0,他引:6  
利用标准Dimensional Change Card Sort任务(DCCS),对76名智力正常的3~8岁聋童和78名3~5.5岁的正常儿童进行了对比测试,旨在考察聋童执行功能发展的年龄特征与发展水平。结果发现,3岁组的聋童和正常儿童在DCCS任务上的表现没有显著性差异,但正常儿童在4~4.5岁时进入一个迅速发展期,而聋童要在6岁时才有快速的发展,到7岁后才相当于正常儿童5岁的发展水平,大约滞后2年。研究认为,造成聋童执行功能发展滞后的原因主要有:(1)语言符号系统和聋童特有的符号系统之间可能存在的差异;(2)聋童可能存在计划和灵活性的缺陷;(3)聋童可能存在命名和标识策略上的困难和注意机制的缺陷。结合关于聋童心理理论发展滞后于正常儿童7年以上的报道,心理理论发展和执行功能发展在聋童身上表现出较大的不一致性。  相似文献   
90.
Based on Jung's definition of archetype the concept 'archetypal story pattern' is developed as well as a research method drawing on narrative analysis and biographical research to identify these archetypal story patterns in life stories. Jung pointed out that personal myths, archetypal patterns found, e.g., in mythology, can govern the life course of individuals unconsciously. In the Theory of Narrative Identity comparable concepts have been mentioned but were never fully developed. In my research I try to combine Jung's concept of the archetype with the elaborated methodology of narrative analysis. Archetypes can manifest as narratives and the identity construction of a person via narrating the life story can be influenced or even totally structured by archetypal stories which give a specific form as well as a specific meaning to the person's identity. The method of extracting an underlying archetypal pattern from an autobiographical narrative is demonstrated. The results of the research on 20 autobiographical interviews and the inherent archetypal patterns are summarized. The major aim of this paper is to describe in detail the application of a well established method of the social sciences on a key concept of Jungian psychology to show that these concepts can be integrated into recent research frameworks of academic sciences. On the other hand it shows that Jungian concepts can be investigated through established and well defined research methods in empirical research settings.  相似文献   
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