Moving beyond text highlights: Inferring users’ interests to improve the relevance of retrieval

Balakrishnan, Vimala and Mehmood, Y. and Nagappan, Y. (2016) Moving beyond text highlights: Inferring users’ interests to improve the relevance of retrieval. Information Research, 21 (4). p. 724. ISSN 1368-1613,

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Introduction. Studies have indicated that users' text highlighting behaviour can be further manipulated to improve the relevance of retrieved results. This article reports on a study that examined users’ text highlight frequency, length and users' copy-paste actions. Method. A binary voting mechanism was employed to determine the weights for the feedback, which were then used to re-rank the original search results. A search engine prototype was built using the Communications of the ACM test collection, with the well-known BM25 acting as the baseline model. Analysis. The proposed enhanced model’s performance was evaluated using the mean average precisions and F-score metrics, and results were compared at the top 5, 10 and 15. Additionally, comparisons were also made based on the number of terms used in a query, that is single, double and triple terms. Results. The findings show that the enhanced model significantly outperformed BM25, and the rest of the models at all document levels. To be specific, the enhanced model showed significant improvements over the frequency model. Additionally, retrieval relevance was found to be the best when the query length is two. Conclusions. Users’ post-click behaviour may serve as a significant indicator of their interests, and thus can be used to improve the relevance of the retrieved results. Future studies could look into further extending this model by including other post-click behaviour such as printing or saving.

Item Type: Article
Funders: University of Malaya: (RP028A-14AET)
Uncontrolled Keywords: Text highlights; Users' interests; Relevance; Retrieval
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Computer Science & Information Technology
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 05 Dec 2017 04:22
Last Modified: 08 Jan 2020 07:42

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