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目的:基于决策树模型探讨引起幼儿超重的关键因素。方法:招募南昌市23所幼儿园5870名3~6岁幼儿,测量身高、体重;问卷调查幼儿身体活动、静坐行为、出生信息,父母的育儿方式、身体形态、锻炼行为和家庭情况,并将其划分为36个变量;采用IBM SPSS modeler软件创建CHAID决策树模型,筛选幼儿超重的关键性因素。结果:CHAID模型准确率达85.23%。CHAID模型结果显示,8个变量与幼儿超重有较强关联性,各变量按重要性排序依次为室外身体活动时间、父亲BMI、母亲BMI、父亲收入、室内身体活动时间、父亲受教育程度、喂养方式、看电视时间。结论:身体活动尤其是室外身体活动与幼儿超重的关系最为密切,父母肥胖程度、父亲收入与受教育情况、喂养方式、静坐行为也是导致幼儿超重的关键性因素。 相似文献
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通过分层抽样,选取广东省东莞市的1289名居民为样本,对其参与社会阅读推广活动情况进行调查。通过对社会阅读活动与信息贫富状况的关联分析发现,信息富裕者更有可能去主动搜集关于读书节等社会大型阅读推广活动的信息,从而使这一人群中知晓读书节活动的人数比例高于其他人群。信息贫困一方面表现为"信息获取意愿的贫困",另一方面则表现为个体对信息获取缺乏(积极的或消极的)体验。对现有社会公共信息资源和服务利用不足是导致信息贫困的重要原因之一。购书费用、年借阅量和数字阅读时间的增加对信息贫富分化影响显著,但这些因素对男性和女性产生的影响有所不同。 相似文献
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Denis Meadows Wendi Beamish 《International Journal of Disability, Development & Education》2014,61(4):332-345
Poor post-school outcomes for youth with disabilities have consistently been reported internationally. Interagency collaboration between school systems and post-school services is critical and key to improving post-school life for these youth. An initial Queensland study that benchmarked the teacher practice of 104 transition teachers and associated personnel indicated that interagency collaboration practices had the lowest levels of implementation. These results were the motivation behind a second study which investigated the hypothesis that lack of teacher control over interagency collaboration practice formed a roadblock for effective transitioning of youth with disabilities. Results generally confirmed the hypothesis and provide further understanding about the multi-faceted nature of interagency collaboration and the stakeholders involved in this process. Three interconnected actions are proposed to bypass identified roadblocks. If these actions are put in place, schools should improve their connections with post-school services, teachers should enhance their practice, and students should achieve improved post-school outcomes. 相似文献
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应用藻类监测农药对环境污染的现状 总被引：2，自引：0，他引：2
农药是环境中的一类重要污染源，应用生物监测能够较好地了解农药对环境的污染状况。藻类是一个很好的测试生物。对藻类对农药反应的敏感性比较、藻类对农药反应的机理以及藻类监测在环境评价中的应用等几个方面的概况进行了概述。 相似文献
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Roman Kaspar Ottmar Döring Eveline Wittmann Johannes Hartig Ulrike Weyland Annette Nauerth Michaela Möllers Simone Rechenbach Julia Simon Iberé Worofka 《Vocations and Learning》2016,9(2):185-206
Valid and reliable standardized assessment of nursing competencies is needed to monitor the quality of vocational education and training (VET) in nursing and evaluate learning outcomes for care work trainees with increasingly heterogeneous learning backgrounds. To date, however, the modeling of professional competencies has not yet evolved into procedures that would meet large-scale assessment (LSA) standards in VET. To empirically test a proposed structural model for client-directed nursing competence and to estimate psychometric properties of a newly developed video- and computer-based test (CBT) to inform subsequent LSA in nursing VET, 402 final-year nursing students from 24 German schools responded to a 77 item CBT. Multi-dimensional IRT modeling was employed to test the subdomain structure and estimate students’ competencies in geriatric nursing. The standardized CBT measures nursing students’ client-directed care competence with acceptable precision (WLE?=?0.76) and does so across the whole range of observed proficiency levels. Structural validity was supported by substantive contributions of test items from all proposed process-oriented subdomains, practice field scenarios, as well as items with and without reference to emotional demands. However, it was not possible to empirically separate the diagnostic, practical or communicative subdomains, probably reflecting parallel, recursive and hierarchical care processes in complex care situations. On average, students in our sample attained 45 % of the maximum test score so it is a demanding assessment of nursing competence. An extensively piloted, valid and reliable CBT is suggested to assess nursing students’ client-directed care competencies at the end of the third year of the VET program. 相似文献
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Improving Biology Performance with Workshop Groups 总被引：1，自引：1，他引：1
Born Wendi K. Revelle William Pinto Lawrence H. 《Journal of Science Education and Technology》2002,11(4):347-365
This 2-year quasi-experiment evaluated the effect of peer-led workshop groups on performance of minority and majority undergraduate biology students. The workshop intervention used was modeled after a program pioneered by Treisman (1992). Majority volunteers randomly assigned to workshops (n = 61) performed significantly better than those assigned to the control group (n = 60, p < 0.05) without spending more time studying. Workshop minority students (n = 25) showed a pattern of increasing exam performance in comparison to historic control minority students (n = 21), who showed a decreasing pattern (p < 0.05). Volunteers (n = 121) initially reported that biology was more interesting and more important to their futures than to nonvolunteers' (n = 435, p < 0.05). Volunteers also reported higher levels of anxiety related to class performance (p < 0.05). The relationship of anxiety to performance was moderated by volunteer status. Performance of volunteers was negatively associated with self-reported anxiety (r = –0.41, p < 0.01). Performance of nonvolunteers was unrelated to self-reported anxiety (r = –0.02). Results suggest elevated anxiety related to class performance may increase willingness to participate in activities such as workshop interventions. In addition, students who volunteer for interventions such as workshops may be at increased risk of performance decrements associated with anxiety. Even so, workshop programs appear to be an effective way to promote excellence among both majority and minority students who volunteer to participate, despite the increased risk of underperformance associated with higher levels of anxiety. 相似文献
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Adam C. Knight Wendi H. Weimar 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(1):48-56
The latency of the peroneus longus may be a key factor in the prevention of lateral ankle sprains (LASs). In addition, ankle taping is often applied to help prevent LASs. The purpose of this study was to determine the effects of a previous LAS and ankle taping on the latency of the peroneus longus after an inversion perturbation. Twenty-six participants, including 13 participants with no previous history of a LAS and 13 participants with a history of a single LAS completed the testing. Ankle taping was applied in a closed basket weave technique on one of the two testing days. The latency of the peroneus longus was determined by the onset of muscle activity exceeding 10 SD from baseline activity, after initiation of the 25° inversion perturbation. A significant main effect (p < 0.05) was present for the ankle support condition, with ankle taping causing a significant reduction in latency of the peroneus longus (65.04 ± 10.81 to 57.70 ± 9.39 ms). There was no difference (p>0.05) in latency between the injury groups. Ankle taping, immediately after application, reduces the latency of the peroneus longus among participants with and without a history of a LAS. 相似文献
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