Sequence-based trust in collaborative filtering for document recommendation

Duen-Ren Liu, Chin Hui Lai*, Hsuan Chiu

*Corresponding author for this work

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

Collaborative filtering (CF) recommender systems have emerged in various applications to support item recommendation, which solve the information-overload problem by suggesting items of interest to users. Recently, trust-based recommender systems have incorporated the trustworthiness of users into CF techniques to improve the quality of recommendation. They propose trust computation models to derive the trust values based on users past ratings on items. A user is more trustworthy if s/he has contributed more accurate predictions than other users. Nevertheless, conventional trust-based CF methods do not address the issue of deriving the trust values based on users various information needs on items over time. In knowledge-intensive environments, users usually have various information needs in accessing required documents over time, which forms a sequence of documents ordered according to their access time. We propose a sequence-based trust model to derive the trust values based on users sequences of ratings on documents. The model considers two factors time factor and document similarity in computing the trustworthiness of users. The proposed model enhanced with the similarity of user profiles is incorporated into a standard collaborative filtering method to discover trustworthy neighbors for making predictions. The experiment result shows that the proposed model can improve the prediction accuracy of CF method in comparison with other trust-based recommender systems.

原文English
頁(從 - 到)587-601
頁數15
期刊International Journal of Human Computer Studies
69
發行號9
DOIs
出版狀態Published - 1 八月 2011

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