Topics and Features of Academic Medical Library Tutorials

ABSTRACT

In a 2007 study, librarians at the University of South Carolina School of Medicine Library examined freely available online tutorials on academic medical library Web sites. The team identified tutorial topics, determined common design features, and assessed elements of active learning in library-created tutorials; the team also generated a list of third-party tutorials to which medical libraries link. This article updates the earlier study, describing changes and trends in tutorial content and design on medical libraries' Web sites; the project team plans to continue to track trends in tutorial development by repeating this study annually.     

新疆撒拉族历史迁徙与文化变迁研究

文章通过梳理相关历史文献并结合田野调查资料,描绘了新疆撒拉族的历史渊源和形成的历史过程;新疆撒拉族在迁徙的历史进程中,为了立足新的环境与周边民族文化进行了长期的互动、积极调适,社会文化发生了积极的变迁.     

Random-Groups Equating with Samples of 50 to 400 Test Takers

Five methods for equating in a random groups design were investigated in a series of resampling studies with samples of 400, 200, 100, and 50 test takers. Six operational test forms, each taken by 9,000 or more test takers, were used as item pools to construct pairs of forms to be equated. The criterion equating was the direct equipercentile equating in the group of all test takers. Equating accuracy was indicated by the root-mean-squared deviation, over 1,000 replications, of the sample equatings from the criterion equating. The methods investigated were equipercentile equating of smoothed distributions, linear equating, mean equating, symmetric circle-arc equating, and simplified circle-arc equating. The circle-arc methods produced the most accurate results for all sample sizes investigated, particularly in the upper half of the score distribution. The difference in equating accuracy between the two circle-arc methods was negligible.