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The study proposes a three-layer conceptual framework and adopts a two-tier diagnostic test theory to develop a web-based two-tier diagnostic test and remedial learning management system called \u201cthe Dr. System.\u201d The study also designs the two-tier diagnostic test items of electro-magnetic concepts and the related multimedia remedial learning materials based on the theory of modular course for the purpose of investigating the remedial learning effects. In addition, the study helps the participants eliminate their misconception through a quasi-experiment at an elementary school in a metropolitan area of northern Taiwan. The results show that the learners of the experimental group who received the treatment under the Dr. System performed significantly better than those who took the traditional remedial class. The study also indicates that the web-based two-tier diagnostic test helps us understand learners\u2019 misconceptions. As a result, it also provides learners useful remedial multimedia materials, which are necessary for them to eliminate their individual misconceptions in the remedial learning process.<\/p>","DOI":"10.4018\/jdet.2010010103","type":"journal-article","created":{"date-parts":[[2010,6,30]],"date-time":"2010-06-30T20:52:05Z","timestamp":1277931125000},"page":"31-53","source":"Crossref","is-referenced-by-count":8,"title":["Web-Based Two-Tier Diagnostic Test and Remedial Learning Experiment"],"prefix":"10.4018","volume":"8","author":[{"given":"Ah-Fur","family":"Lai","sequence":"first","affiliation":[{"name":"Taipei Municipal University of Education, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Deng-Jyi","family":"Chen","sequence":"additional","affiliation":[{"name":"National Chiao Tung University, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"jdet.2010010103-0","unstructured":"Chan, H. J. (2000). 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