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Elizabeth A. Stuart Stephen H. Bell Cyrus Ebnesajjad Robert B. Olsen Larry L. Orr 《Journal of research on educational effectiveness》2017,10(1):168-206
Given increasing interest in evidence-based policy, there is growing attention to how well the results from rigorous program evaluations may inform policy decisions. However, little attention has been paid to documenting the characteristics of schools or districts that participate in rigorous educational evaluations, and how they compare to potential target populations for the interventions that were evaluated. Utilizing a list of the actual districts that participated in 11 large-scale rigorous educational evaluations, we compare those districts to several different target populations of districts that could potentially be affected by policy decisions regarding the interventions under study. We find that school districts that participated in the 11 rigorous educational evaluations differ from the interventions' target populations in several ways, including size, student performance on state assessments, and location (urban/rural). These findings raise questions about whether, as currently implemented, the results from rigorous impact studies in education are likely to generalize to the larger set of school districts—and thus schools and students—of potential interest to policymakers, and how we can improve our study designs to retain strong internal validity while also enhancing external validity. 相似文献
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Vickie Wong Takashi Abe Raksha N. Chatakondi Zachary W. Bell Robert W. Spitz Scott J. Dankel 《Journal of sports sciences》2019,37(16):1865-1873
The purpose was to determine if the muscle swelling, echo intensity, and fatigue responses to blood flow restriction differs based on cuff width (Experiment 1), applied pressure (Experiment 2), and sex. Ultrasound of muscle was taken before and after exercise. In Experiment 1 (n = 96), men swelled more than women and more with a narrow cuff than a wide cuff (0.60 cm vs. 0.52 cm). Expressed as a percentage change, there were no longer differences between cuffs (Narrow: 15% vs. Wide: 14%) or sex (Men: 14% vs. Women: 15%). Echo intensity remained unchanged. Women required more repetitions to reach task failure in sets 2, 3, and 4. In Experiment 2 (n = 87), men swelled more than women (Men: 0.46 cm vs. Women: 0.31 cm). Expressed as a percentage change, there were no differences. Echo intensity decreased in both conditions and to a greater extent with a higher applied pressure. If the acute muscle swelling response is important for initiating long term adaptation, then our results indicate that neither cuff width, sex, nor applied pressure will differentially impact the adaptation observed via this mechanism. Changes in echo intensity were inconsistent and the utility of this measurement may need to be reconsidered. 相似文献
106.
Strategy implementation is important because failure to carry out strategy can cause lost opportunities and leave police officers reluctant to do strategic planning. Lack of implementation creates problems in maintaining priorities and reaching organizational goals. The strategy execution task is commonly the most complicated and time-consuming part of strategic, management. Yet, strategy implementation suffers from a general lack of academic attention. This research paper makes a contribution to police strategy implementation literature by developing a, research model to study the extent of intelligence strategy implementation. 相似文献
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Malcolm Bell Wendy Bell 《British journal of educational technology : journal of the Council for Educational Technology》2005,36(4):643-656
This case study looks at the lessons learned from the ultimately successful implementation of the Blackboard Managed Learning Environment at Northumbria University and explores how these are now being applied to the matching implementation at a local further education college, which we are supporting. The study identifies key aspects that emerged from Northumbria's experience—the application of models of innovation from both educational and business worlds, the need to take account of the impact of cultural change, the need for effective staff development for all stakeholders, the need for a ‘road map’ for the development, and the need for ongoing dialogue with clients (staff) and customers (students). It reflects upon how Northumbria's approach has led to the emergence of a learning organisation that is adaptive and responsive and how a business approach can be applied to higher and further education innovations. 相似文献
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Edward B. Bell 《Economics of Education Review》1984,3(2):105-110
This paper examines a theoretical issue concerning the relationship between private pecuniary returns to a college education and the fraction of high-school graduates who choose to enroll in college. If capital markets are imperfect in the sense that the rate of interest at which individuals can borrow exceeds the rate at which they can lend, then we cannot rule out the possibility of a paradox; namely, enrollment rates may not always be directly related to the net present value of an education. The result is developed from a two-period utility-maximizing model of an individual's investment decision. 相似文献
110.
Minor physical anomalies and behavior in preschool children 总被引:10,自引:0,他引:10