Item validation of online postsecondary courses: rating the proximity between similarity and dissimilarity among item pairs (Validation study series I: multidimensional scaling)

Soonhwa Seok

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Item validation of online postsecondary courses: rating the proximity between similarity and dissimilarity among item pairs (Validation study series I: multidimensional scaling)

机译：在线大专课程的项目确认：对项目对之间相似性和不相似性之间的接近程度进行评估（验证研究系列I：多维标度）

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The purpose of this study was to identify and validate items applicable to evaluating online courses at the postsecondary level. Items were derived from a review of the literature. Four judges rated the similarity of the items by making pair-wise comparisons utilizing multidimensional scaling (MDS). The study consisted of five stages. Stage I involved identifying items. Stage II involved validating items. Stage III involved sampling. Stage IV involved developing an online MDS instrument accommodating the 4,851 ([99 * 98]/2) pair-wise comparisons and rating them. Stage V involved data collection and analysis. The results of the MDS study indicated a three-dimensional solution (Accessibility, Adaptability, and Clarity of Communication) as the appropriate model for analysis. The three-dimensional solution indicated .24222 for the fit values of STRESS and .74 for R-squared. Four clusters were identified as Contextual Accommodation, Instructional Access, Guided Learning, and Organizational Clarity.

机译：这项研究的目的是确定和验证适用于评估中学后在线课程的项目。项目来自对文献的回顾。四名法官通过使用多维标度（MDS）进行成对比较，对项目的相似性进行了评分。该研究包括五个阶段。第一阶段涉及确定项目。第二阶段涉及验证项目。第三阶段涉及抽样。第四阶段涉及开发在线MDS仪器，以容纳4,851（[99 * 98] / 2）成对比较并对其进行评级。第五阶段涉及数据收集和分析。 MDS研究的结果表明，三维解决方案（可访问性，适应性和通信清晰度）是进行分析的合适模型。三维解决方案的STRESS拟合值指示为0.222，R平方的指示值为.74。确定了四个类别：情境适应，教学准入，指导学习和组织清晰。

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《Educational Technology Research and Development》 |2009年第5期|665-684|共20页
作者
Soonhwa Seok;
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作者单位

The Center for Research on Learning of the University of Kansas1000 Sunnyside, Dole Building 3061, Lawrence, KS 66044, USA;

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正文语种 eng
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关键词
Multidimensional scaling; Validation; Proximity; Postsecondary level education; Online course; Evaluation instrument;

机译：多维缩放;验证;接近;大专教育;在线课程;评估工具;

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Item validation of online postsecondary courses: rating the proximity between similarity and dissimilarity among item pairs (Validation study series I: multidimensional scaling)

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