Temporal diversity in recommender systems
Temporal diversity in recommender systems
复制标题
推荐系统中的时间多样性
DOI:
10.1145/1835449.1835486
复制
发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Lathia N
中科院分区:
文献类型:
--
作者:
Lathia N
Collaborative Filtering (CF) algorithms, used to build web-based recommender systems, are often evaluated in terms of howaccuratelythey predict user ratings. However, current evaluation techniques disregard the fact that users continue to rate itemsover time: the temporal characteristics of the system's top-Nrecommendations are not investigated. In particular, there is no means of measuring the extent that thesame itemsare being recommended to users over and over again. In this work, we show that temporal diversity is an important facet of recommender systems, by showing how CF data changes over time and performing a user survey. We then evaluate three CF algorithms from the point of view of thediversityin the sequence of recommendation lists they produce over time. We examine how a number of characteristics of user rating patterns (including profile size and time between rating) affect diversity. We then propose and evaluate set methods that maximise temporal recommendation diversity without extensively penalising accuracy.
DOI:
--
发表时间:
2009
期刊:
Annual International ACM SIGIR Conference on Research and Development in Information Retrieval
影响因子:
--
作者:
D. Hawking;Tom Rowlands;Paul Thomas
通讯作者:
Paul Thomas