arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1809.08922cs.IRcs.LGstat.ML
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上下文感知的顺序项目推荐系统

Context-Aware Systems for Sequential Item Recommendation

Quizlet, Inc.(Quizlet公司)

Moin Nadeem, Dustin Stansbury, Shane Mooney

摘要:

Quizlet是美国最受欢迎的在线学习工具,超过2/3的高中生和1/2的大学生使用。超过95%的Quizlet用户报告成绩有所提高,该平台已成为数百万教室使用的事实上的工具。在本文中,我们探讨的任务,推荐合适的内容,为学生学习,考虑到他们的兴趣,以及他们的同龄人正在学习。我们提出了一种新的方法,即神经教育推荐引擎(NERE),推荐教育内容,利用学生的行为,而不是评级。我们发现,这种方法更好地捕捉了与学习更一致的社会因素。NERE基于一个循环神经网络,包括协作和基于内容的推荐方法,并考虑到任何特定学生的速度,掌握和经验,以推荐适当的任务。我们通过联合学习用户嵌入和内容嵌入来训练NERE,并尝试预测最终时间戳的内容嵌入。我们还为我们的神经网络开发了一个置信度估计器,这是生产化这个模型的关键要求。我们将NERE应用于Quizlet的专有数据集,并给出了我们的结果。我们在内容嵌入空间中的R^2得分为0.81,在100个最近邻上的召回率为54%。这大大超过了标准矩阵分解方法提供的12%的recall@100分数。最后,我们将讨论如何部署NERE,并将我们的工作定位为K-12空间的第一个教育推荐系统之一。

英文摘要:

Quizlet is the most popular online learning tool in the United States, and is used by over 2/3 of high school students, and 1/2 of college students. With more than 95% of Quizlet users reporting improved grades as a result, the platform has become the de-facto tool used in millions of classrooms. In this paper, we explore the task of recommending suitable content for a student to study, given their prior interests, as well as what their peers are studying. We propose a novel approach, i.e. Neural Educational Recommendation Engine (NERE), to recommend educational content by leveraging student behaviors rather than ratings. We have found that this approach better captures social factors that are more aligned with learning. NERE is based on a recurrent neural network that includes collaborative and content-based approaches for recommendation, and takes into account any particular student's speed, mastery, and experience to recommend the appropriate task. We train NERE by jointly learning the user embeddings and content embeddings, and attempt to predict the content embedding for the final timestamp. We also develop a confidence estimator for our neural network, which is a crucial requirement for productionizing this model. We apply NERE to Quizlet's proprietary dataset, and present our results. We achieved an R^2 score of 0.81 in the content embedding space, and a recall score of 54% on our 100 nearest neighbors. This vastly exceeds the recall@100 score of 12% that a standard matrix-factorization approach provides. We conclude with a discussion on how NERE will be deployed, and position our work as one of the first educational recommender systems for the K-12 space.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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