甘岑的自然演绎演算

迄今为止,我们所主要讨论的逻辑演算,即用公理方法处理的狭谓词演算,标志着把数学方法运用于逻辑获得了显著的成功。这种演算的形式上的简易是令人称道的,从纯粹数学的观点看,它可以同公理化的射影几何及抽象群论这一类数学观念的完满体现的学科相媲美。此外,作为应用于研究演绎系     

新的多重智力观

人们可以轻易地测出高度,但智力却没有这样简单.这主要是因为人们具有多重智力,而不是简单的一种智力.总的来讲,我已区分了七种形式的智力.在现代社会得到高度评价的两种智力是语言和逻辑数理(Logical-mathematic)能力.当人们认为某人聪明时,往往是指这两种能力.因为个体有了语言和逻辑数理能力,就能在那些所谓测量智力的测验上获得好分数.     

判断和选择中的认知错觉

人类的错误为研究人类智能的结构和功能提供了有价值的资料。对于记忆的研究多是建立在遗忘的基础上,对知觉的研究常常基于识别力衰退,对于语言和思维的研究已经揭示了失言。关于人类错误的研究格外重要,因为它表明了人类智力的某些局限,它时常暴露出隐藏在人们行为之下的规律和机制,它常常提示出可以改善人们表现的方式。错觉是一种特殊的错误,它特别令人困惑,因为人们造成的这种错误始终具有迷惑力,甚至当人们已彻底认识到这是一种错误时亦然。例如,我们会感到在图1中右边的线     

共产主义实验在苏联

1.斯大林个人扭曲了的共产主义意识形态“斯大林主义”,是苏联官方理论家从不使用的一个术语。而且,它一般也并没有被人们广泛地当作马克思-列宁主义来运用。有时候,斯大林主义被误解为是马列主义的一种扩大或发展。实际上,斯大林主义倒可以看作是从马列主义中派生出来并且背离了马列主义的,它(直到1953年斯大林去世时     

Timing multimodal events in pigeons

The peak procedure was used in two experiments to study pigeons' ability to time multimodal events. In the first experiment, birds were trained to time a single event consisting of a 9-s tone or light followed by a 21-s fixed interval associated with a signal of light or tone (signal of the other modality). On occasional empty trials, different lengths of the first signal were followed by a long period of the second signal. Peak response times as a function of the duration of the first signal were linear and had a slope of close to one in all birds. This indicates that the birds were timing only the second signal. In a second experiment, two complex events were used in training. One consisted of a 9-s tone or light followed by a 21-s fixed interval associated with a light or tone. The other consisted of a 21-s tone or light followed by a 9-s fixed interval associated with a light or tone. Different durations of the first signal were again used on empty trials. Peak response times as a function of the duration of the first signal were again linear in all birds. The slope of the function was less than one but greater than zero for 3 birds. This indicates that these birds were partly timing the entire complex event of 30-s duration and partly timing only the second signal of the event. A model is proposed in which the bird takes as a criterion for timing a weighted average of different target criteria. Comparisons with the performance of rats are made.     

民族心理结构——系统初探

用系统论方法研究民族心理,把民族心理看作一个结构——系统,首先应该搞清楚这个结构——系统是由哪些因素构成的?这些因素是怎样排列的?它们相互关系的性质如何?实际上,这都是有紧密联系的问题     

咖啡因与心理紧张对血压的影响:交叉文化的比较研究

引言饮用含有咖啡因的饮料已遍及全球。大多数西方国家如美、英、法,习惯饮用咖啡;大多数东方国家如中、印、日,习惯用茶。还有一些国家喜欢饮含少量咖啡因的可可,“瓜拉那”等。据估计每年世界咖啡消费量已超过400万吨(Rokeitson,1978)。茶在中国的消费,也从1965年的43000吨,上升至1976年的139000吨(“中国经济年鉴”,1981)。为什么全世界范围内这样普遍地饮用咖啡和茶呢?原因是这些饮料中的咖啡因能提神解劳,提高感觉敏锐度和反应速度,使思路畅通,延长智力劳动的时间。如Nash(1962)的研究表明,咖啡因有助于成对联想学习,听觉材料的及时回忆,以及完成不完整的句子。但是近年来人们发现,咖啡因对人体有有害的作用。摄入咖啡因后,其中的甲基黄嘌呤     

Pursuing and distancing: the construct and its measurement

Although the concept of interpersonal pursuing and distancing has been introduced and used clinically, the lack of a reliable and valid measure has deterred its more formal investigation and relevance to personality theory. The Pursuing-Distancing (P-D) Scale, a 92-item measure of the behavioral expression of these characteristics, was developed. Evidence for internal consistency as well as internal support of construct validity is presented and discussed. An 80-item revised scale is available from the authors and is currently being evaluated in a variety of external validation settings.     

Effects of ratio reinforcement schedules on discrimination performance by Japanese monkeys

In Experiment 1, Japanese monkeys were trained on three conditional position-discrimination problems with colors as the conditional cues. Within each session, each problem was presented for two blocks of ten reinforcements; correct responses were reinforced under continuous-reinforcement, fixed-ratio 5, and variable-ratio 5 schedules, each assigned to one of the three problems. The assignment of schedules to problems was rotated a total of three times (15 sessions per assignment) after 30 sessions of acquisition training. Accuracy of discrimination increased to a moderate level with fewer trials under CRF than under ratio schedules. In contrast, the two ratio schedules, fixed and variable, were more effective in maintaining accurate discrimination than was CRF. With further training, as asymptotes were reached, accuracy was less affected by the schedule differences. These results demonstrated an interaction between the effects of reinforcement schedules and the level of acquisition. In Experiment 2, ratio sizes were gradually increased to 30. Discrimination accuracy was maintained until the ratio reached 20; ratio 30 strained the performance. Under FR conditions, accuracy increased as correct choice responses cumulated after reinforcement.