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Cognitive diagnosis models (CDMs) continue to generate interest among researchers and practitioners because they can provide diagnostic information relevant to classroom instruction and student learning. However, its modeling component has outpaced its complementary component??test construction. Thus, most applications of cognitive diagnosis modeling involve retrofitting of CDMs to assessments constructed using classical test theory (CTT) or item response theory (IRT). This study explores the relationship between item statistics used in the CTT, IRT, and CDM frameworks using such an assessment, specifically a large-scale mathematics assessment. Furthermore, by highlighting differences between tests with varying levels of diagnosticity using a measure of item discrimination from a CDM approach, this study empirically uncovers some important CTT and IRT item characteristics. These results can be used to formulate practical guidelines in using IRT- or CTT-constructed assessments for cognitive diagnosis purposes. 相似文献
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In this article, we explore factors that influence the number of broadcasters in a market and the achievement of optimal outcomes in broadcast markets.We explore a range of barriers to entry and means of overcoming those barriers in broadcast markets.We argue that choices regarding and influences on barriers to entry and channel availability act as forms of competition management in broadcast markets. Policymakers and regulators indirectly influence markets by altering the effects of those barriers and directly influence market activities by making decisions regarding the number of competitors, market structures,and-indirectly-the financial performance of broadcasters. We argue that barriers to entry can be controlled to produce competition levels and market outcomes that promote optimal social and economic outcomes. 相似文献
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ABSTRACTUsing Korean Longitudinal Study of Aging data, we examined the influence of older adults’ individual characteristics (i.e. marital status, health and economic status) on life satisfaction, with the mediating effect of older adults’ active participation in lifelong learning. As a result, some individual characteristics appeared to significantly determine both learning participation and life satisfaction. Economic status appeared to function as a significant predictor of older adults’ participation in lifelong learning programmes, which ultimately resulted in a significant improvement in their life satisfaction. Marital status and health were also significant contributors to older adults’ life satisfaction. The mediating model was tenable according to model-data fit indices. 相似文献
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Joann E Donatiello Peter W Droese Soo H Kim 《Journal of the Medical Library Association》2004,92(2):257-265
Research documents the existence of racial and ethnic health disparities. As a result, policy makers are seeking to address these disparities. This list is a starting point for building or updating a collection that supports this policy development process. It is written for health policy librarians and researchers and includes annotated recommendations for books, periodicals, government publications, and Websites. Entries for print publications are primarily from 1998 to 2003. 相似文献
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This study was aimed to find which tutoring styles significantly predict learners’ satisfaction with an e-learning service, academic involvement, and academic achievement. The tutoring styles included subject expert, facilitator, guider, and administrator. In this study, 818 Korean sixth-grade students (ages 11–12 years), enrolled in the e-study program, and completed tutoring style and academic satisfaction evaluation surveys. Students’ login and posting frequency in the e-study program were measured to assess their academic involvement. Academic achievement was computed using completion rates and assessment scores. Multiple regression analyses indicated that there is some association between tutoring styles and academic outcomes. Of the four tutoring styles, facilitating tutoring styles particularly showed strong associations with the three outcome variables. Tutors’ guiding activities as opposed to facilitating were not significant contributors to students’ academic outcomes. The effect of tutors’ facilitating styles in an online learning environment was significant as being found in the existent literature. 相似文献
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This study examines the facets and patterns of multiple Web query reformulations with a focus on reformulation sequences. Based on IR interaction models, it was presumed that query reformulation is the product of the interaction between the user and the IR system. Query reformulation also reflects the interplay between the surface and deeper levels of user interaction. Query logs were collected from a Web search engine through the selection of search sessions in which users submitted six or more unique queries per session. The final data set was composed of 313 search sessions. Three facets of query reformulation (content, format, and resource) as well as nine sub-facets were derived from the data. In addition, analysis of modification sequences identified eight distinct patterns: specified, generalized, parallel, building-block, dynamic, multitasking, recurrent, and format reformulation. Adapting Saracevic’s stratified model, the authors develop a model of Web query reformulation based on the results of the study. The implications for Web search engine design are finally discussed and the functions of an interactive reformulation tool are suggested. 相似文献
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Soo Bin Jang 《Multicultural Perspectives》2018,20(2):117-121
Based on my reflections on “being a foreigner,” I explore the boundaries of citizenship education in this essay. I use my foreign identity to articulate how social justice education can perpetuate closed-mindedness in classrooms by moving too quickly to student activism. I situate my experiences and reflections on being a foreigner within previous conversations about notions of certainty and indoctrination in the field of education philosophy, and I make an argument to create a safe intellectual space for my students. Creating such space is not neglecting moral responsibility or perpetuating privilege but actually navigating through the binary between “us” and “them.” 相似文献
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AbstractIt is often observed that when sport celebrities are involved in scandals they continue to reap a variety of benefits once the scandal fades. While it may appear they suffer little consequence for their misdeed, consequences do of course ensue. One of these is relative deprivation, particularly for young groups. This study examines how young South Koreans differently shape relative deprivation according to the type of scandal. A sample of 262 Korean university students were subjected to a priming scenario technique that showed examples of Korean sport celebrities’ real scandals. This study finds that Korean university students’ cognition, affect, and behaviour of relative deprivation were positively correlated to one another. Only the behavioural dimension was significantly different according to the type of scandal. The results could be implemented toward customising sport organisation’s communication message and a sport celebrity’s image repairing strategy when the scandal is related to social equity. 相似文献
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This research investigates how people’s perceptions of information retrieval (IR) systems, their perceptions of search tasks, and their perceptions of self-efficacy influence the amount of invested mental effort (AIME) they put into using two different IR systems: a Web search engine and a library system. It also explores the impact of mental effort on an end user’s search experience. To assess AIME in online searching, two experiments were conducted using these methods: Experiment 1 relied on self-reports and Experiment 2 employed the dual-task technique. In both experiments, data were collected through search transaction logs, a pre-search background questionnaire, a post-search questionnaire and an interview. Important findings are these: (1) subjects invested greater mental effort searching a library system than searching the Web; (2) subjects put little effort into Web searching because of their high sense of self-efficacy in their searching ability and their perception of the easiness of the Web; (3) subjects did not recognize that putting mental effort into searching was something needed to improve the search results; and (4) data collected from multiple sources proved to be effective for assessing mental effort in online searching. 相似文献