Using Weighted Sum Scores to Close the Gap Between DIF Practice and Theory     

Hongwen Guo  Neil J. Dorans 《Journal of Educational Measurement》2020,57(4):484-510

We make a distinction between the operational practice of using an observed score to assess differential item functioning (DIF) and the concept of departure from measurement invariance (DMI) that conditions on a latent variable. DMI and DIF indices of effect sizes, based on the Mantel-Haenszel test of common odds ratio, converge under restricted conditions if a simple sum score is used as the matching or conditioning variable in a DIF analysis. Based on theoretical results, we demonstrate analytically that matching on a weighted sum score can significantly reduce the difference between DIF and DMI measures over what can be achieved with a simple sum score. We also examine the utility of binning methods that could facilitate potential operational use of DIF with weighted sum scores. A real data application was included to show this feasibility.  相似文献   

Teaching science to students with developmental disabilities using the Early Science curriculum     

Magdalena M. Apanasionok  Julie Neil  Richard C. Watkins  Corinna F. Grindle  Richard P. Hastings 《Support for Learning》2020,35(4):493-505

There is a large science attainment gap between students with and without special educational needs, and many students with developmental disabilities (DD) struggle to access the mainstream science programmes of study. The purpose of the present project was to pilot the use of the Early Science (ES) curriculum over a six week period with nine students with moderate to severe DD in a special education setting in the UK. Staff members indicated positive experiences of using the curriculum, especially the use of the structured teaching methodology as a helpful tool. Evaluation data suggested that all nine pupils improved their science knowledge over the course of the intervention. Some suggestions are made to improve the delivery of the ES curriculum in UK special education settings, and the need for larger scale evaluation research.  相似文献   

An Investigation of Text‐based Instructional Materials Enhanced with Graphics     

Elspeth McKay 《教育心理学》1999,19(3):323-335

ABSTRACT An adaptation of Bagley's (1990) experiment which compared the interaction of instructional format with adult learners was carried out replacing the Wechsler Adult Intelligence Scale (WAIS) arithmetic reasoning subtest with the Riding & Cheema (1991) Cognitive Styles Analysis (CSA). There was an additional inclusion of graphics to the structured instructional format, as an independent variable. A total of 45 participants attended workshops to learn how to write PASCAL programs. All of the participants completed the CSA and their CSA‐ratio was used to select pairs of similar CSA‐ratios. One participant from each pair was given a text‐only instructional booklet, while the other was given a text‐plus‐graphics instructional booklet. The treatment groups were controlled for instructional format (text‐only/text‐plus‐graphics) and cognitive style. The independent variables were used to test for their effect on learning abstract computer programming concepts. It was found that the Verbal‐Imagery cognitive style and instructional treatment interacted in their effect on the performance‐difference scores. The Novice‐Verbal programmers performed best with a text‐plus‐graphics instructional format, performing significantly better than the Novice‐Imagers’ subgroups using the same text‐plus‐graphics material. Conversely, the Novice‐Imagers participants performed better with the material. However, the Experienced‐Imagery participants performed better with the text‐plus‐graphics instructional material than the Experienced‐Verbalisers. Overall, the Verbalisers’ worst performance occurred with the text‐only materials, while their best performance occurred with the text‐plus‐graphics material. This pilot experiment suggests that learning performance is affected by an interaction of cognitive style and instructional format. However, this interaction was contrary to expectations (Riding & Douglas, 1993), with Verbalisers performing best with text‐plus‐graphics instructional material and Novice‐Imagers performing best with text‐only instructional material.  相似文献   

The Citation Cloud of a biomedical article: a free,public, web-based tool enabling citation analysis     

Neil R. Smalheiser  Jodi Schneider  Vetle I. Torvik  Dean P. Fragnito  Eric E. Tirk 《Journal of the Medical Library Association》2022,110(1):103

Background:An article''s citations are useful for finding related articles that may not be readily found by keyword searches or textual similarity. Citation analysis is also important for analyzing scientific innovation and the structure of the biomedical literature. We wanted to facilitate citation analysis for the broad community by providing a user-friendly interface for accessing and analyzing citation data for biomedical articles.Case Presentation:We seeded the Citation Cloud dataset with over 465 million open access citations culled from six different sources: PubMed Central, Microsoft Academic Graph, ArnetMiner, Semantic Scholar, Open Citations, and the NIH iCite dataset. We implemented a free, public extension to PubMed that allows any user to visualize and analyze the entire citation cloud around any paper of interest A: the set of articles cited by A, those which cite A, those which are co-cited with A, and those which are bibliographically coupled to A.Conclusions:Citation Cloud greatly enables the study of citations by the scientific community, including relatively advanced analyses (co-citations and bibliographic coupling) that cannot be undertaken using other available tools. The tool can be accessed by running any PubMed query on the Anne O''Tate value-added search interface and clicking on the Citations button next to any retrieved article.  相似文献   

A perpetual motion machine: The preserved digital scholarly record     

Tom Cramer  Chip German  Neil Jefferies  Alicia Wise 《Learned Publishing》2023,36(2):312-318

• Digital preservation will never be a solved problem: it needs constant reinvention, and is going to become harder over time.
• Scholarship is changing and this is affecting what needs to be preserved and what preservation means to the future of knowledge discovery.
• The diversification of outputs means that knowledge exists in a network of contextual metadata, data, software, standards and publications—requiring multilateral management of this complex knowledge graph.
• Preservation demands new skills, technologies and resources from librarians, publishers, funders and institutions—and more joined-up thinking about archiving.

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An approach to conducting follow up on vocational students: Implications for educational planning     

Neil Hintzen 《Performance Improvement》1990,29(8):33-40

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Double lock of a potent human therapeutic monoclonal antibody against SARS-CoV-2     

Ling Zhu  Yong-Qiang Deng  Rong-Rong Zhang  Zhen Cui  Chun-Yun Sun  Chang-Fa Fan  Xiaorui Xing  Weijin Huang  Qi Chen  Na-Na Zhang  Qing Ye  Tian-Shu Cao  Nan Wang  Lei Wang  Lei Cao  Huiyu Wang  Desheng Kong  Juan Ma  Chunxia Luo  Yanjing Zhang  Jianhui Nie  Yao Sun  Zhe Lv  Neil Shaw  Qianqian Li  Xiao-Feng Li  Junjie Hu  Liangzhi Xie  Zihe Rao  Youchun Wang  Xiangxi Wang  Cheng-Feng Qin 《国家科学评论(英文版)》2021,8(3)

Receptor recognition and subsequent membrane fusion are essential for the establishment of successful infection by SARS-CoV-2. Halting these steps can cure COVID-19. Here we have identified and characterized a potent human monoclonal antibody, HB27, that blocks SARS-CoV-2 attachment to its cellular receptor at sub-nM concentrations. Remarkably, HB27 can also prevent SARS-CoV-2 membrane fusion. Consequently, a single dose of HB27 conferred effective protection against SARS-CoV-2 in two established mouse models. Rhesus macaques showed no obvious adverse events when administrated with 10 times the effective dose of HB27. Cryo-EM studies on complex of SARS-CoV-2 trimeric S with HB27 Fab reveal that three Fab fragments work synergistically to occlude SARS-CoV-2 from binding to the ACE2 receptor. Binding of the antibody also restrains any further conformational changes of the receptor binding domain, possibly interfering with progression from the prefusion to the postfusion stage. These results suggest that HB27 is a promising candidate for immuno-therapies against COVID-19.  相似文献