Explicit vs Implicit Profiling A CaseStudy in Electronic Programme Guides.pdf

Explicit vs Implicit Profiling - A Case-Study in Electronic Programme Guides Derry OSulIivan , Barry Smyth, David Wilson Smart Media Institute, University College Dublin, Ireland {dermot.osullivan, barry.smyth, david.wilson}@ucd.ie Abstract mouse movements and scrolling although mouse movement was only found to be a useful rating predictor at lower rating In this paper, we evaluate the use of implicit in- levels. Interestingly , [Claypool et ai, 2001] finds no correla- terest indicators as the basis fo r user profiling in tion between user ratings and the number of clicks to links on the Digita l TV domain . Research in more tradi- a Web page. tional domains, such as Web browsing or Usenet In this paper we seek to evaluate the use of implicit profil- News, indicates that some implicit interest indica- ing i n a very different application domain , Digita l TV (DTV) . tors (e.g. , read-time and mouse movements) are ca- DTV users are finding it increasingly difficult to identify rele- pable of serving as alternative to explicit profile in-