A framework for scaffolding students' assessment of the credibility of evidence     

Iolie Nicolaidou  Eleni A. Kyza  Frederiki Terzian  Andreas Hadjichambis  Dimitris Kafouris 《科学教学研究杂志》2011,48(7):711-744

Assessing the credibility of evidence in complex, socio‐scientific problems is of paramount importance. However, there is little discussion in the science education literature on this topic and on how students can be supported in developing such skills. In this article, we describe an instructional design framework, which we call the Credibility Assessment Framework, to scaffold high school students' collaborative construction of evidence‐based decisions and their assessment of the credibility of evidence. The framework was employed for the design of a web‐based reflective inquiry environment on a socio‐scientific issue, and was enacted with 11th grade students. The article describes the components of the Credibility Assessment Framework and provides the details and results of an empirical study illustrating this framework in practice. The results are presented in the form of a case study of how 11th grade students investigated and evaluated scientific data relating to the cultivation of genetically modified plants. Multiple kinds of data were collected, including pre‐ and post‐tests of students' conceptual understanding and their skills in assessing the credibility of evidence, and videotapes of students' collaborative inquiry sessions. The analysis of the pre‐ and post‐tests on students' conceptual understanding of Biotechnology and their skills in assessing the credibility of evidence revealed statistically significant learning gains. Students' work in task‐related artifacts and the analysis of two groups' videotaped discussions showed that students became sensitive to credibility criteria, questioned the sources of data and correctly identified sources of low, moderate, and high credibility. Implications for designers and educators regarding the application of this framework are discussed. © 2011 Wiley Periodicals, Inc. J Res Sci Teach 48: 711–744, 2011  相似文献   

对当前中国“三农”问题的几点认识     

伍旭中 《安徽教育学院学报》2011,(5):62-67

中国农业的基础性地位及其所处的从传统农业向现代农业转化的发展阶段和产业化内容决定了农村改革的主体、地权制度和乡村管理制度,也同时决定了中国现代农业的道路选择。  相似文献   

论长篇小说《繁华都市的新市民》揭露出来的社会问题     

木阿拉木·米尔阿布都拉 《吉林省教育学院学报》2011,(4)

本文通过对维吾尔族作家阿布都热合曼·卡哈尔的长篇小说《繁华都市的新市民》主题思想、人物塑造的分析,探讨小说所透射出的维吾尔当代社会的各种问题。  相似文献   

普通高校高水平运动队发展中部分热点问题探析     

蔡存军  黄泽江 《搏击·武术科学》2011,8(2):112-114

文章采用文献资料、逻辑分析等研究方法,对中国高校高水平运动队的发展现状进行研究,总结和分析高水平运动队在建设管理中的部分热点问题;并就未来发展提出一些改革措施和方法,以期能为高校高水平运动队的管理提供新的理论参考,推动高校高水平运动队持续、健康、快速的发展。  相似文献   

工程心理学作用、地位和进展          下载免费PDF全文

孙向红  吴昌旭  张亮  瞿炜娜 《中国科学院院刊》2011,26(6):650-660

工程心理学研究人机系统中人的心理特征、行为规律以及人与机器和环境的相互作用。作为一门较新的心理学分支学科,正随着当今社会信息化程度的提高而逐渐被人们所重视。本文概括性地介绍了工程心理学的研究对象、核心科学问题及其在国内外的发展历程。从作业者的认知操作与工作绩效,情境意识、心理负荷与自动化,以及人机交互这三个工程心理学研究的主要领域对其研究内容与进展进行了介绍,并对学科研究方法的进展及其在工业产品设计与军事领域的应用进行了总结。最后,本文从理论和应用两方面对未来工程心理学的发展提出了建议和展望。  相似文献   

近五年来国内外索引研究的进展与趋势     

邱均平  曾倩 《情报科学》2011,(7)

为了深入了解国内外在索引领域的研究进展,本文应用文献计量法和内容分析法,对2005-2009年间国内外研究索引的文献进行统计分析,包括期刊分布、作者分布、主题分布三个方面,总结当前国内外索引研究的热点,并预测未来研究中的发展趋势。结果表明,国外索引领域的核心期刊已基本形成,而国内索引领域的核心期刊群尚未稳定;国内外目前都尚未形成稳定的核心作者群;在研究热点方面,国内外情况有所差异,但发展趋势趋于一致。  相似文献   

我国跨境资本异常流动的变化趋势及影响因素分析     

辛佳临 《科学．经济．社会》2011,29(2):50-57

本文采用宽口径测算了我国跨境资本异常流动的规模,并在此基础上建立实证模型,分别运用误差修正模型和向量自回归模型定量分析了热钱流入和资本外逃规模的影响因素,探讨跨境资本异常流动与国内宏观经济变量的关系。得出的结论是：我国热钱流入与资本外逃并存,近几年来在总量上呈现出双双扩大态势。热钱流入受国内外利差、外贸依存度、证券资产价格因素的正向影响,受人民币汇率预期、通货膨胀率、外债负债率因素的反向影响,GDP增长率对热钱流入的影响不显著。诸多影响热钱流入的因素,也同样会影响资本外逃,说明了热钱流入有突然逆转成资本外逃的可能性。而对热钱流入和资本外逃作协整检验和格兰杰因果检验的结果进一步证实了二者之间的联系。  相似文献   

职业秘书的处事应变能力     

卢兆强 《科教文汇》2011,(18):196-197

职业秘书处事应变能力的高低可以影响企业的发展步伐。增强个人综合素质、提高人际交往水平,提升对紧急事态的评估能力是时代对职业秘书处事应变能力的迫切诉求。  相似文献   

自然资源分类相关问题探讨及新分类方案构建     

沈镭 《资源科学》2021,43(11):2160-2172

对自然资源进行统一的科学分类是开展自然资源调查评价、履行其管理职责、编制国土空间规划、实施山水林田湖草的整体保护、系统修复和综合治理、实现自然资源治理能力现代化等重大战略任务的最基础性前期工作。针对学术界、管理层和实际工作者对自然资源分类的不同意见和分歧,本文创新性地从空间、属性、用途、管理等视角提出了一个含有3个一级大类、11种二级门类、62种三级类别的新分类框架和分类方案。该方案不仅区分了自然资源的地理空间,便于分类管理和实际操作,而且区分了自然资源的不同用途与属性,很好地反映了作为物质或能量的自然资源与作为环境条件的自然要素之间类型上的差异性。研究成果为推进自然资源分类体系的完善,并与国际接轨、提升自然资源治理现代化能力,以及推动自然资源管理部门与生态环境、农田水利、国土空间规划、城乡建设等部门在自然资源、国土空间、生态修复等重大任务和目标上的有机衔接,具有重要应用价值和现实意义。  相似文献   

High arsenic tolerance in Brevundimonas aurantiaca PFAB1 from an arsenic-rich Indian hot spring     

《Electronic Journal of Biotechnology》2021

BackgroundArsenic contamination in the ground water of rural India is a recurrent problem and decontamination is mostly based on the chemical or physical treatments until now. Microbial bioremediation is eco-friendly, cheap, time-efficient and does not produce any toxic by-products.ResultIn the present study, a high arsenic tolerant bacteria Brevundimonas aurantiaca PFAB1 was isolated from Panifala hot spring located in West Bengal, India. Previously Panifala was also reported to be an arsenic-rich hot spring. B. aurantiaca PFAB1 exhibited both positive arsenic reductase and arsenite oxidase activity. It was tolerant to arsenite up to 90 mM and arsenate up to 310 mM. Electron microscopy has proved significant changes in cellular micromorphology and stalk appearance under the presence of arsenic in growth medium. Bioaccumulation of arsenic in As (III) treated cells were 0.01% of the total cell weight, while 0.43% in case of As (V) treatment.ConclusionsAll experimental lines of evidence prove the uptake/accumulation of arsenic within the bacterial cell. All these features will help in the exploitation of B. aurantiaca PFAB1 as a potent biological weapon to fight arsenic toxicity in the near future.How to cite: Banerjee A, Sarkar S, Gorai S, et al. High arsenic tolerance in Brevundimonas aurantiaca PFAB1 from an arsenic-rich Indian hot spring. Electron J Biotechnol 2021:52. https://doi.org/10.1016/j.ejbt.2021.05.006  相似文献