Could scientists use Altmetric.com scores to predict longer term citation counts?     

Mike Thelwall  Tamara Nevill 《Journal of Informetrics》2018,12(1):237-248

Altmetrics from Altmetric.com are widely used by publishers and researchers to give earlier evidence of attention than citation counts. This article assesses whether Altmetric.com scores are reliable early indicators of likely future impact and whether they may also reflect non-scholarly impacts. A preliminary factor analysis suggests that the main altmetric indicator of scholarly impact is Mendeley reader counts, with weaker news, informational and social network discussion/promotion dimensions in some fields. Based on a regression analysis of Altmetric.com data from November 2015 and Scopus citation counts from October 2017 for articles in 30 narrow fields, only Mendeley reader counts are consistent predictors of future citation impact. Most other Altmetric.com scores can help predict future impact in some fields. Overall, the results confirm that early Altmetric.com scores can predict later citation counts, although less well than journal impact factors, and the optimal strategy is to consider both Altmetric.com scores and journal impact factors. Altmetric.com scores can also reflect dimensions of non-scholarly impact in some fields.  相似文献   

Impact Factors and the Central Limit Theorem: Why citation averages are scale dependent     

Manolis Antonoyiannakis 《Journal of Informetrics》2018,12(4):1072-1088

Citation averages, and Impact Factors (IFs) in particular, are sensitive to sample size. Here, we apply the Central Limit Theorem to IFs to understand their scale-dependent behavior. For a journal of n randomly selected papers from a population of all papers, we expect from the Theorem that its IF fluctuates around the population average μ, and spans a range of values proportional to $\sigma /\sqrt{n}$, where σ² is the variance of the population's citation distribution. The $1/\sqrt{n}$ dependence has profound implications for IF rankings: The larger a journal, the narrower the range around μ where its IF lies. IF rankings therefore allocate an unfair advantage to smaller journals in the high IF ranks, and to larger journals in the low IF ranks. As a result, we expect a scale-dependent stratification of journals in IF rankings, whereby small journals occupy the top, middle, and bottom ranks; mid-sized journals occupy the middle ranks; and very large journals have IFs that asymptotically approach μ. We obtain qualitative and quantitative confirmation of these predictions by analyzing (i) the complete set of 166,498 IF & journal-size data pairs in the 1997–2016 Journal Citation Reports of Clarivate Analytics, (ii) the top-cited portion of 276,000 physics papers published in 2014–2015, and (iii) the citation distributions of an arbitrarily sampled list of physics journals. We conclude that the Central Limit Theorem is a good predictor of the IF range of actual journals, while sustained deviations from its predictions are a mark of true, non-random, citation impact. IF rankings are thus misleading unless one compares like-sized journals or adjusts for these effects. We propose the Φ index, a rescaled IF that accounts for size effects, and which can be readily generalized to account also for different citation practices across research fields. Our methodology applies to other citation averages that are used to compare research fields, university departments or countries in various types of rankings.  相似文献   

Technological research in the EU is less efficient than the world average. EU research policy risks Europeans’ future     

Alonso Rodríguez-Navarro  Ricardo Brito 《Journal of Informetrics》2018,12(3):718-731

We have studied the efficiency of research in the EU by a percentile-based citation approach that analyzes the distribution of country papers among the world papers. Going up in the citation scale, the frequency of papers from efficient countries increases while the frequency from inefficient countries decreases. In the percentile-based approach, this trend, which is uniform at any citation level, is measured by the e_p index that equals the P_{top 1%}/P_{top 10%} ratio. By using the e_p index we demonstrate that EU research on fast-evolving technological topics is less efficient than the world average and that the EU is far from being able to compete with the most advanced countries. The e_p index also shows that the USA is well ahead of the EU in both fast- and slow-evolving technologies, which suggests that the advantage of the USA over the EU in innovation is due to low research efficiency in the EU. In accord with some previous studies, our results show that the European Commission’s ongoing claims about the excellence of EU research are based on a wrong diagnosis. The EU must focus its research policy on the improvement of its inefficient research. Otherwise, the future of Europeans is at risk.  相似文献   

Exploring policies for the reduction of child physical abuse and neglect     

《Child abuse & neglect》2015

Policies can be powerful tools for prevention given their potential to affect conditions that can improve population-level health. Given the dearth of empirical research on policies’ impacts on child maltreatment, this article (a) identifies 37 state policies that might have impacts on the social determinants of child maltreatment; (b) identifies available data sources documenting the implementation of 31 policies; and (c) utilizes the available data to explore effects of 11 policies (selected because they had little missing data) on child maltreatment rates. These include two policies aimed at reducing poverty, two temporary assistance to needy families policies, two policies aimed at increasing access to child care, three policies aimed at increasing access to high quality pre-K, and three policies aimed at increasing access to health care. Multi-level regression analyses between within-state trends of child maltreatment investigation rates and these 11 policies, controlling for states’ childhood poverty, adults without a high school diploma, unemployment, child burden, and race/ethnicity, identified two that were significantly associated with decreased child maltreatment rates: lack of waitlists to access subsidized child care and policies that facilitate continuity of child health care. These findings are correlational and are limited by the quality and availability of the data. Future research might focus on a reduced number of states that have good quality administrative data or population-based survey data on child maltreatment or reasonable proxies for child maltreatment and where data on the actual implementation of specific policies of interest can be documented.  相似文献   

Accounting for quality: arts evaluation,public value and the case of “Culture counts”     

Abigail Gilmore  Hilary Glow  Katya Johanson 《Cultural Trends》2017,26(4):282-294

Arts policy has a longstanding relationship with the concept of “quality” and the ways in which organisations measure, evaluate and account for it. Culture Counts, an evaluation system and digital platform, compiles data from standardised evaluation surveys of different stakeholder groups – organisations, audiences, critics, funders and peers – and provides the means to compare and triangulate data in an accessible format. As a result, it claims to provide a more effective, democratic tool for quality measurement of art, which demonstrates the public value of funding [Department of Culture and the Arts, & Knell, J. (2014). Public value measurement framework: Measuring the quality of the arts. Perth: Department of Culture and the Arts.]. Through qualitative research with two consortia of organisations involved in Culture Counts pilot projects in Manchester, England and Victoria, Australia, we explore these claims, comparing the reception and promotion of the system in both countries and considering its potential incorporation into policy assessment frameworks and adoption within arts organisations’ existing evaluation capacities.  相似文献   

基于Mystery Shopping的公共图书馆服务质量评估     

林绮 《江西图书馆学刊》2014,(2):39-41

解析Mystery Shopping评估检测法,研究威尔士公共图书馆服务质量评估Mystery Shopping项目,揭示该项目对国内公共图书馆服务质量评估的启示。  相似文献   

职业训练的效益评估——以企业内训为例     

徐秀燕  张慧慈  萧德瑛  巫勇贤 《湖北大学成人教育学院学报》2015,(1):4-7,23

近年来,职业训练训后评估逐渐被重视,例如美国训练与发展协会(ASTD)及台湾人才发展质量管理系统(TTQS)等,皆关注参训者于训练时所习得的新知识或技术是否能应用于职场中,以利直接提升企业的实质效益。本研究于2014年5⁶月份期间,协助台湾地区65家事业单位进行训后追踪评估,总共搜集了65位企业主管及429位参训学员评估训练成效。研究发现,学员认为参训后在新知识及技术的获得、受训内容应用于实务中、及提升工作表现等方面,具有最明显的改变;此结果与企业主管评估参训学员训后能力提升的结果相符,主管认为员工参训后在训练内容的应用、获得新知识与技术、提升工作表现、及问题解决能力等皆有不错表现。另外,企业主管也认为训练除了能提升员工表现以外,在组织目标达成、组织营运绩效、及组织营运成本等,皆有正向的影响及改善。整体上,参训学员及企业主管对于训练计划成果持正向支持的态度,并乐于继续参与训练课程以加强组织竞争力。  相似文献   

基于粗糙集的决策规则可靠性评估方法     

李一强  吕宁 《大观周刊》2011,(18):123-124,113

粗糙集理论是处理不精确、不准确数据的有效方法，但是通过粗糙集方法获得的决策规则对于不完整的信息承统和随机数据也是不确定的。本文描述了一个用于决策规则的可靠性评价方法。该方法独立于任何专用引申规则方法，并且参数能够被调整以适应不同的信息系统。  相似文献   

高职“工学结合”教育模式下考评方式改革试点分析     

沈萍 《武汉职业技术学院学报》2011,10(4):67-69

传统的考评方式存在着与高等职业教育的培养目标相违背的弊病，由此引发了的一些不良现象。武汉职业技术学院根据高等职业教育的特点，以及“工学结合”教育模式的要求，确定了考评方式改革思路，并且进行了改革试点，课题组对考评改革试点的实施情况进行了分析与总结，为考评方式的改革提供了可操作性的意见。  相似文献   

北京2022年冬奥会和冬残奥会遗产价值及其评估研究     

徐拥军  张丹  闫静 《武汉体育学院学报》2020,54(10):15-22

北京2022年冬奥会和冬残奥会遗产是中国对奥林匹克运动许下的新愿景，这一愿景具体在《北京2022年冬奥会和冬残奥会遗产战略计划》的7项遗产、35项内容之中得以体现，它们既是对未来遗产的多元创造，也是对既有遗产的夏冬延续。根据历届OGI报告、奥组委官方政策文本与"一续二全三跨"原则，确定北京2022年冬奥会和冬残奥会遗产的评估要求，并以定量与定性结合分析法、KPIs、风险评估法、成本效益分析法为指引，打造一个凝聚新理念、汇聚新模式、融合新方法的奥运遗产价值评估的"北京方案"。  相似文献