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An improved memory-based collaborative filtering method based on the TOPSIS technique

Al-Bashiri, Hael and Abdulgabber, Mansoor Abdullateef and Awanis, Romli and Kahtan, Hasan (2018) An improved memory-based collaborative filtering method based on the TOPSIS technique. PLoS ONE, 13 (10). pp. 1-26. ISSN 1932-6203

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This paper describes an approach for improving the accuracy of memory-based collaborative filtering, based on the technique for order of preference by similarity to ideal solution (TOPSIS) method. Recommender systems are used to filter the huge amount of data available online based on user-defined preferences. Collaborative filtering (CF) is a commonly used recommendation approach that generates recommendations based on correlations among user preferences. Although several enhancements have increased the accuracy of memory-based CF through the development of improved similarity measures for finding successful neighbors, there has been less investigation into prediction score methods, in which rating/preference scores are assigned to items that have not yet been selected by a user. A TOPSIS solution for evaluating multiple alternatives based on more than one criterion is proposed as an alternative to prediction score methods for evaluating and ranking items based on the results from similar users. The recommendation accuracy of the proposed TOPSIS technique is evaluated by applying it to various common CF baseline methods, which are then used to analyze the MovieLens 100K and 1M benchmark datasets. The results show that CF based on the TOPSIS method is more accurate than baseline CF methods across a number of common evaluation metrics.

Item Type: Article
Uncontrolled Keywords: TOPSIS method; filtering method; Collaborative filtering
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Faculty/Division: Faculty of Computer System And Software Engineering
Institute of Postgraduate Studies
Depositing User: Noorul Farina Arifin
Date Deposited: 15 Oct 2018 07:32
Last Modified: 18 Oct 2019 02:32
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