Improving the Help Selection Policy in a Reading Tutor that Listens
msra(2004)
摘要
What type of oral reading assistance is most effective for a given student on a given word? We analyze 189,039 randomized trials of a within-subject experiment to compare the effects of several types of help in the 2002- 2003 version of Project LISTEN's Reading Tutor. The independent variable is the type of help given on a word. The outcome variable is the student's performance at the next encounter of that word, as measured by automatic speech recognition. Training a help selection policy sensitive to student or word level improves this outcome by a projected 4% - a substantial effect for picking a single better
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关键词
automatic speech recognition,randomized trial
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