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Theoretical writings on policy analysis have often dealt with the problem of adjudicating value issues as well as the problem of complexity. Since both these problems are ultimately epistemological in character, this paper explores their structure from a less familiar non‐foundational, coherentist epistemological framework, within the context of the synoptic/anti‐synoptic debate in policy analaysis. The paper argues against a sharp distinction between fact and value in policy choice, and recommends the gradual replacement of ubiquitous folk psychological simplifying assumptions in favour of scientific ones, where predictions systematically lapse, as a step towards dealing with complexity.  相似文献   
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Data Mashups     
Tim Green 《TechTrends》2010,54(5):20-21
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This article reports on a UK study identifying innovative practice in the use of ICT to link home and school and its potential for enhancing learning. It is set in the context of recent political tensions and the mismatch between ICT use in the home and traditional educational systems. The theoretical framework draws upon curriculum theories and reviews what is already known about home use of ICT. A survey was administered to schools identified for innovative models of practice in both teaching and learning, and management and administration. From the 115 responses, eight contrasting case-study schools were selected. Three exemplars highlight a shift in practices: a move towards self-directed learning; greater flexibility and autonomy for students; and improved communication between home and school. We argue that technology could support a broader access to the curriculum, but that policy-makers should be aware of the digital divide issues. Young people's home use of technology suggests a rich experience involving exploratory activities, access to knowledge and the opportunity to publish their views. Curriculum reform is essential in order to maximize the potential of technology. It demands a shift away from current curriculum and pedagogy towards critical thinking and knowledge construction.  相似文献   
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Why is there an increased need for quantitative indicators of student socioeconomic status at the school level? What alternative approaches have been used to measure SES? Can principals accurately estimate the SES distribution of their student populations? How do their estimates correlate with other indexes o f family SES?  相似文献   
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BACKGROUND: Cochrane-style systematic reviews increasingly require the participation of librarians. Guidelines on the appropriate search strategy to use for systematic reviews have been proposed. However, research evidence supporting these recommendations is limited. OBJECTIVE: This study investigates the effectiveness of various systematic search methods used to uncover randomized controlled trials (RCTs) for systematic reviews. Effectiveness is defined as the proportion of relevant material uncovered for the systematic review using extended systematic review search methods. The following extended systematic search methods are evaluated: searching subject-specific or specialized databases (including trial registries), hand searching, scanning reference lists, and communicating personally. METHODS: Two systematic review projects were prospectively monitored regarding the method used to identify items as well as the type of items retrieved. The proportion of RCTs identified by each systematic search method was calculated. RESULTS: The extended systematic search methods uncovered 29.2% of all items retrieved for the systematic reviews. The search of specialized databases was the most effective method, followed by scanning of reference lists, communicating personally, and hand searching. Although the number of items identified through hand searching was small, these unique items would otherwise have been missed. CONCLUSIONS: Extended systematic search methods are effective tools for uncovering material for the systematic review. The quality of the items uncovered has yet to be assessed and will be key in evaluating the value of the systematic search methods.  相似文献   
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In May 2002, the Denison Memorial Library at the University of Colorado Health Sciences Center and the J. Otto Lottes Health Sciences Library at the University of Missouri-Columbia, with funding from the National Network of Libraries of Medicine-Midcontinental Region, embarked on a collaborative, real-time reference project using the 24/7 Reference, Inc., software package. This paper describes how the project was conceived, and includes details on the service hours, staffing, training, marketing, lessons learned, and future plans for the service.  相似文献   
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