Bias in content validity on the Boehm Test of Basic Concepts for White and Mexican-American children

Item bias on Forms A and B of the Boehm Test of Basic Concepts was examined for a sample of White and Mexican-American kindergarten children. The method employed to detect biased items, as defined by an items-by-group interaction, was a two-way analysis of variance with followup being conducted with a Bonferroni-type procedure. Bias-in-item difficulty occurred for both groups, which does not conform to the current popular press view that bias is against ethnic minorities and not against the White majority. The finding that on some items the Mexican-American group out-performed the White group indicates the need to examine carefully the question of bias and to reconsider popular conceptualizations of the many issues of bias in educational and psychological testing.     

300t LF炉水冷炉盖水路优化及应用

通过对LF精炼炉水冷炉盖的水路进行分析和研究,提出了对密排管式水冷炉盖水路进行优化。优化后,水冷炉盖的各水路出水水温降低到原设计要求,高温报警得到抑制,取得了显著地经济效益。     

新中国图书馆学研究对象争鸣六十年—— 一个“近似本质说”的视角

新中国成立60年来,图书馆学界对图书馆学对象的研究取得了重要突破和进展,产生了诸多“对象说”。文章从“近似本质说”的视角对我国60年来图书馆学研究对象的争鸣概况进行了综述。     

Video tutorials revisited: The relationship between their use and library assessment quiz scores

There is considerable literature evaluating video tutorials. By the first decade of the twenty-first century, research established that online video tutorials performed as well as traditional face-to-face instruction. However, there is little evidence that students actually viewed the tutorials. This study compares postinstruction assessment quiz scores from one class over four semesters with usage statistics for five video tutorials during the same time frame. The data indicate that students do view the tutorials. However, the results also show that usage statistics, together with quiz scores, declined as students progressed through the five tutorials. Additionally, the study determined that there was no positive correlation between the number of viewings and postviewing assessment scores.     

Internationalizing Reference Education

Reference instruction should also involve preparing library and information science students for working with international students. There are numerous options for embedding such content into courses. In addition, professional organizations offers students with many opportunities to launch their international experiences.     

无机化学中自由焓——氧化态图的应用

无机化学中元素及其化合物的氧化还原性在不同介质中、不同氧化态时表现出较大差异,其变化规律不易把握。可应用元素及其化合物的自由焓-氧化态图对其相对稳定性、歧化反应发生的可能性、氧化还原反应进行的趋向性以及氧化还原能力大小等性质进行判断。     

制定标准化质量监控体系构建成人高校教学督导机制

通过对成人高校教学督导机制背景及趋势的分析,提出应根据成人高校教学督导的性质、任务、工作原则和方法制定课堂教学督导流程;遵循国际化标准构建在全面教学质量管理体系中运行的成人高校教学督导机制,推动课堂教学质量水平的提高。     

对参考文献中增刊著录的探讨

增刊是在正刊之外出版的连续出版物,但《信息与文献参考文献著录规则GB/T 7714—2015》对增刊著录格式没有明确规定。参考文献中增刊著录不规范的问题非常普遍,主要体现为增刊期号和页码的著录形式不同。分析其原因,主要体现为不同期刊和数据库对增刊期号和页码的标志不同。因此提出规范增刊著录的建议,使作者和编辑有例可循。     

α—苯基—2—呋喃甲醇的一个还原反应

α—苯基—2—呋喃甲醇与PPh3在CCl4中于40℃反应1h后．得到淡黄色的固体物，加入MeCOOEt溶解，再加咪唑钠反应1h．得2—苄基呋南     

竞技太极推手发展现状的研究

一项运动从推广到走向竞技场是一段艰苦复杂的历程,然而太极推手在经过二十多年后竟然退出了竞技场,这其中肯定有一些主客观原因。本研究在文献分析、问卷调查以及录体外受精资料分析等基础上对竞技太极推手的竞赛规则、技术动作、训练保障等方面展开了分析与讨论,研究发现这些方面都有待于完善提高。