arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.07360cs.IR
收藏

DebiasedRec:面向个性化新闻推荐的偏见感知用户建模与点击预测

DebiasedRec: Bias-aware User Modeling and Click Prediction for Personalized News Recommendation

Jingwei Yi, Fangzhao Wu, Chuhan Wu, Qifei Li, Guangzhong Sun, Xing Xie

摘要:

新闻推荐是个性化新闻访问的关键。现有的新闻推荐方法通常根据用户的历史新闻点击量来推断用户的个人兴趣,并通过预测未来的新闻点击量来训练新闻推荐模型。这些方法背后的一个核心假设是,新闻点击行为可以表明用户的兴趣。然而,在实际场景中,除了用户兴趣与新闻内容之间的相关性之外,新闻点击行为还可能受到其他因素的影响,例如在线平台中新闻呈现的偏差。例如,位置较高、尺寸较大的新闻通常更容易被点击。点击新闻的偏向性会给用户兴趣建模和模型训练带来噪声,影响新闻推荐模型的性能。本文提出了一种具有偏见意识的个性化新闻推荐方法DebiasRec,该方法可以处理偏见信息,从而更准确地进行用户兴趣推断和模型训练。我们的方法的核心包括一个偏见表示模块,一个偏见意识的用户建模模块,和一个偏见意识的点击预测模块。偏见表征模块用于对不同类型的新闻偏见及其相互作用进行建模,以捕捉它们对点击行为的联合影响。偏见感知的用户建模模块旨在通过使用用户的偏见信息来校准兴趣模型,从而从点击的新闻文章中推断用户的去偏见兴趣。偏置感知点击预测模块用于根据偏置点击行为来训练去偏置新闻推荐模型,其中点击分数被分解为指示用户对新闻内容的兴趣的偏好分数和从其不同偏置特征推断的新闻偏置分数。在两个真实数据集上的实验表明,该方法能有效地提高新闻推荐的性能。

英文摘要:

News recommendation is critical for personalized news access. Existing news recommendation methods usually infer users' personal interest based on their historical clicked news, and train the news recommendation models by predicting future news clicks. A core assumption behind these methods is that news click behaviors can indicate user interest. However, in practical scenarios, beyond the relevance between user interest and news content, the news click behaviors may also be affected by other factors, such as the bias of news presentation in the online platform. For example, news with higher positions and larger sizes are usually more likely to be clicked. The bias of clicked news may bring noises to user interest modeling and model training, which may hurt the performance of the news recommendation model. In this paper, we propose a bias-aware personalized news recommendation method named DebiasRec, which can handle the bias information for more accurate user interest inference and model training. The core of our method includes a bias representation module, a bias-aware user modeling module, and a bias-aware click prediction module. The bias representation module is used to model different kinds of news bias and their interactions to capture their joint effect on click behaviors. The bias-aware user modeling module aims to infer users' debiased interest from the clicked news articles by using their bias information to calibrate the interest model. The bias-aware click prediction module is used to train a debiased news recommendation model from the biased click behaviors, where the click score is decomposed into a preference score indicating user's interest in the news content and a news bias score inferred from its different bias features. Experiments on two real-world datasets show that our method can effectively improve the performance of news recommendation.

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。

↑