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This paper introduces the self-adaptive item bank and adaptive item selection strategy based on the cognitive diagnosis theory that dynamically detects the students' knowledge and analyzes the state according to the answering habits and knowledge mastering status of different students. This paper analyzes and contrasts a variety of traditional cognitive diagnosis theories and proposes a mixed cognitive diagnosis question bank and a selection strategy model to provide strong support for the construction of student models.<\/jats:p>","DOI":"10.4018\/ijdcf.2020100102","type":"journal-article","created":{"date-parts":[[2020,9,10]],"date-time":"2020-09-10T09:15:52Z","timestamp":1599729352000},"page":"20-31","source":"Crossref","is-referenced-by-count":3,"title":["Research on the Construction of a Student Model of an Adaptive Learning System Based on Cognitive Diagnosis Theory"],"prefix":"10.4018","volume":"12","author":[{"given":"Yang","family":"Zhao","sequence":"first","affiliation":[{"name":"JiLin University, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaqin","family":"Fan","sequence":"additional","affiliation":[{"name":"JiLin University, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mingrui","family":"Yin","sequence":"additional","affiliation":[{"name":"Beijing University of Posts and Telecommunications, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cheng","family":"Fang","sequence":"additional","affiliation":[{"name":"Civil Aviation University of China, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"IJDCF.2020100102-0","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-28801-2_10"},{"key":"IJDCF.2020100102-1","author":"D.Bra","year":"2007"},{"key":"IJDCF.2020100102-2","doi-asserted-by":"crossref","unstructured":"Brusilovsky P, Eklund J& Schwarz E. 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