Building Personalized Readability Equation and English Vocabulary List for Continued Reading Study in Comparison among Differently Proposed Algorithms

  • Yoshinori Miyazaki Shizuoka University
  • Shumma Suzuki Shizuoka University
Keywords: E-Learning, Gamification, Personalized Wordlist, Readability, Similarity


The authors have developed REX, a web application for facilitating English reading study, for non-native speakers of English. REX has a function that personalizes their individual readability equations based on their study logs and that predicts the ease or difficulty of the texts provided. For a parameter of such equations, the rate of difficult words, which does not appear in the specified vocabulary list, is often used, as in some of the well-known readability formulas. On the other hand, we believe that the use of a static vocabulary list to produce its rate does not contribute to personalization, because each learner has different vocabularies. This triggered the authors to incorporate a new function to let learners click their unknown words while they are reading texts, play “English Word Game”, and further predict the status of known/unknown of the wordsin the designated vocabulary list. In this study, we will focus on new labeling algorithms and an experiment to evaluate whether the quality of labeling has been improved. Among the devised several algorithms (A to E), making comparisons is also attempted.


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