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A Developed Collaborative Filtering Similarity Method to Improve the Accuracy of Recommendations under Data Sparsity

Al-Bashiri, Hael and Abdulgabber, Mansoor Abdullateef and Awanis, Romli and Norazuwa, Salehudin (2018) A Developed Collaborative Filtering Similarity Method to Improve the Accuracy of Recommendations under Data Sparsity. International Journal of Advanced Computer Science and Applications (IJACSA), 9 (4). pp. 135-142. ISSN 2156-5570(Online)

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Abstract

This paper presented a new similarity method to improve the accuracy of traditional Collaborative Filtering (CF) method under sparse data issue. CF provides the user with items, that what they need, based on analyses the preferences of users who have a strong correlation to him/her preference. However, the accuracy is influencing by the method that use to find neighbors. Pearson correlation coefficient and Cosine measures, as the most widely used methods, depending on the rating of only co-rated items to find the correlations between users. Consequently, these methods have lack of ability in addressing the sparsity. This paper presented a new proposed similarity method based on the global user preference to address the sparsity issue and improve the accuracy of recommendation. Thus, the novelty of this method is the ability to solve the similarity issue with a capability of finding the relationship among non-correlated users. Furthermore, to determine the right neighbors during the process of computing the similarity between a pair of users, the developed method considered two main factors (fairness and proportion of co-rated). The MovieLens 100K benchmark dataset is used to evaluate the developed method accuracy. The experiments’ result showed that the accuracy of the developed method is improved compared to the traditional CF similarity methods using a specific common CF evaluation metrics.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Recommendation system; collaborative filtering; similarity method; data sparsity
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Faculty/Division: Faculty of Computer System And Software Engineering
Depositing User: Noorul Farina Arifin
Date Deposited: 12 Jun 2018 03:20
Last Modified: 20 Sep 2018 08:17
URI: http://umpir.ump.edu.my/id/eprint/21368
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