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排序方式： 共有2474条查询结果，搜索用时 968 毫秒
991.
This study compared the WISC-R performance of 40 children ranging in age from 6–6 to 15–10, referred to a university center for suspected learning disabilities, with that of two clinically defined groups of learning disabled children. The university center children were found to have WISC-R profiles similar to those of the learning disabled children, with higher overall levels of performance. It was speculated that these children avoid classification as learning disabled by virtue of possessing higher cognitive abilities than those children who are classified. Implications were raised concerning the role of university centers with children experiencing learning difficulties and the accuracy of parental perceptions of learning disabilities. 相似文献
992.
Stephen Turner 《Metascience》2015,24(3):463-465
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Stephen P. Norris 《Educational Measurement》1988,7(3):5-11
This paper describes briefly a methodology for developing multiple-choice critical thinking tests which attempts to overcome certain problems of validity and fairness facing such tests. The paper proposes that direct evidence on test validity be gathered using verbal reports of students' thinking on trial items. 相似文献
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Query Expansion with Long-Span Collocates 总被引：1，自引：0，他引：1
The paper presents two novel approaches to query expansion with long-span collocates—words, significantly co-occurring in topic-size windows with query terms. In the first approach—global collocation analysis—collocates of query terms are extracted from the entire collection, in the second—local collocation analysis—from a subset of retrieved documents. The significance of association between collocates was estimated using modified Mutual Information and Z score. The techniques were tested using the Okapi IR system. The effect of different parameters on performance was evaluated: window size, number of expansion terms, measures of collocation significance and types of expansion terms. We present performance results of these techniques and provide comparison with related approaches. 相似文献
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This article will provide a brief overview of the primary computer network structures serving the U.S. academic research community. Plans for transforming the Internet into a National Research and Education Network are moving forward under the leadership of the National Science Foundation and the Federal Research Internet Coordinating Committee. The article outlines the scope of computational and information resources likely to be available to users through the national network, and highlights the role envisioned for the network in facilitating effective remote interaction by researchers with colleagues, scientific instruments, and data. When fully implemented, the national network can serve both as a powerful utility that extends the capabilities of scholars, scientists, and engineers, and as a testbed for an electronic information infrastructure available to every home, office and factory in the United States in the 21st century. 相似文献
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