Search (2 results, page 1 of 1)

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Abstract

In response to calls for recommender systems to balance accuracy and alternative measures such as diversity and novelty, we propose that recommendation strategies should be applied adaptively according to users' preference traits. Psychological scales for "preference diversity" and "openness to novelty" were developed to measure users' willingness to accept diverse and novel recommendations, respectively. To validate the scales empirically, a user study was conducted in which 293 regular moviegoers were asked to judge a set of 220 movies representing both mainstream and "long-tail" appeals. The judgment task involved indicating and rating movies they had seen, heard of but not seen, and not known previously. Correlatoin analyses were then conducted between the participants' preference diversity and openness to novelty scores with the diversity and novelty of their past movie viewing profile and movies they had not seen before but shown interest in. Preference diversity scores were shown to be significantly related to the diversity of the movies they had seen. Higher preference diversity scores were also associated with greater diversity in favored unknown movies. Similarly, participants who scored high on the openness to novelty scale had viewed more little-known movies and were generally interested in less popular movies as well as movies that differed from those they had seen before. Implications of these psychological traits for recommendation strategies are also discussed.

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Abstract

The study adopts a naturalistic approach to investigate users' interaction with a browsable MeSH (medical subject headings) display designed to facilitate query construction for the PubMed bibliographic database. The purpose of the study is twofold: first, to test the usefulness of a browsable interface utilizing the principle of faceted classification; and second, to investigate users' preferred query submission methods in different problematic situations. An interface that incorporated multiple query submission methods - the conventional single-line query box as well as methods associated the faceted classification display was constructed. Participants' interactions with the interface were monitored remotely over a period of 10 weeks; information about their problematic situations and information retrieval behaviors were also collected during this time. The traditional controlled experiment was not adequate in answering the author's research questions; hence, the author provides his rationale for a naturalistic approach. The study's findings show that there is indeed a selective compatibility between query submission methods provided by the MeSH display and users' problematic situations. The query submission methods associated with the display were found to be the preferred search tools when users' information needs were vague and the search topics unfamiliar. The findings support the theoretical proposition that users engaging in an information retrieval process with a variety of problematic situations need different approaches. The author argues that rather than treat the information retrieval system as a general purpose tool, more attention should be given to the interaction between the functionality of the tool and the characteristics of users' problematic situations.