Does Maximizing Information at the Cut Score Always Maximize Classification Accuracy and Consistency?

A common suggestion made in the psychometric literature for fixed‐length classification tests is that one should design tests so that they have maximum information at the cut score. Designing tests in this way is believed to maximize the classification accuracy and consistency of the assessment. This article uses simulated examples to illustrate that one can obtain higher classification accuracy and consistency by designing tests that have maximum test information at locations other than at the cut score. We show that the location where one should maximize the test information is dependent on the length of the test, the mean of the ability distribution in comparison to the cut score, and, to a lesser degree, whether or not one wants to optimize classification accuracy or consistency. Analyses also suggested that the differences in classification performance between designing tests optimally versus maximizing information at the cut score tended to be greatest when tests were short and the mean of ability distribution was further away from the cut score. Larger differences were also found in the simulated examples that used the 3PL model compared to the examples that used the Rasch model.     

Multiple determinants of “blocking” effects on operant behavior

Blocking was investigated in a free-operant procedure by presenting a response-contingent signal prior to reinforcer delivery. At issue was the way in which blocking effects previously reported with this procedure are related to conditioned reinforcement effects, also previously found with similar procedures. Signal presentation decreased response rate when delay of reinforcement was 0 or .5 sec, but the signal increased response rate when the delay of reinforcement was increased to 3 sec. Thus, which effect (blocking or conditioned reinforcement) occurred depended critically on the response-reinforcer interval.     

FuzzyAHP在灾情评价中的应用

本文首先把AHP与模糊数学中的隶属函数结合起来 ,对我国 1 995年内 30个省、自治区的主要灾情进行评价和排序 ;其次 ,由聚类分析法分类 ;并通过统计检验显示出该分类是合适的 ;它提供了一种正确评价灾情的有效方法 .     

Extinction of stimulus elements decreases the rate of conditional discrimination learning

Pigeons were trained on a successive discrete-trial conditional discrimination, in which either of two colors appeared on the center key and either of two forms appeared on the two side keys. Some combinations of color and form (S+ trials) were followed by food; other combinations (S-trials) were followed by no food. The colors on the center key appeared throughout the intertrial interval (ITI) preceding the trial period in which both the color and the form compound were presented or the color appeared only during the trial period in compound with the forms. Presentation of the colors during the ITI substantially degraded acquisition of two separate types of conditional discrimination. The results show that the temporal correlation of the eolors-with food, independent of their association with the form cues, played a substantial role in determining their availability for acquisition of the conditional discrimination.     

军旅戏剧与当下戏剧现状

中国当代军旅戏剧有着突出的美学风格,在创作主题和意境开掘方面取得了独特成就,为丰富中国当代戏剧舞台提供了可资借鉴的经验。当下社会戏剧的创作正处在最好时期,但也存在不少问题。     

AutoCAD应用中常见问题及解决方法

AutoCAD是目前国内外使用最多的计算机辅助设计软件之一，该软件具有功能强大、用户界面友好、操作简捷等特点。文中就AutoCAD在使用过程中经常遇到的一些问题进行了分析，并提出了相应的解决方法。     

Improving study success and diversity in Dutch higher education using performance agreements

Tertiary Education and Management - More and more governments have started to introduce elements of performance in the funding mechanisms for their higher education institutions. An example is a...     

关于地方院校旅游专业人才教育的思考

地方院校旅游专业人才培养的核心问题是人才培养模式的探究,涵盖培养目标、课程建设、师资队伍与教学模式四大环节。其培养目标是造就知识与能力并重的一专多能的复合型人才。课程设置要坚持理论与实践并重的原则,在课程建设上要充分体现为地方经济服务的宗旨。地方旅游院校应抓紧建设一支具有双师素质与教学和科研能力并重的师资队伍。突出地方特色,面向国际市场,加大实训力度,努力构建"理论--技能--实践"捆绑的教学模式,是实现地方院校旅游专业人才培养目标的有效途径。     

不同级别羽毛球运动员的腰部伤病发生规律研究

对我国110名二级以上羽毛球运动员进行腰部损伤问卷调查,结果发现腰病损伤发病率高达39.1%,分析不同级别运动员腰损伤的特点,发现羽毛球运动员专项化训练过早是腰损伤发生的训练体制因素。羽毛球运动发展特点引起羽毛球运动员某些腰病特点发生变化,而疲劳引起的身体机能不良、技术动作不规范及医务监督的不足是引起羽毛球运动员腰损伤发生的重要原因。