• Index size estimation (2015)

    Index size estimation (2015)

    One of the determining factors of the quality of Web search engines is the size of their index. In our ISSI 2015 paper, we present the results of a longitudinal analysis of estimating the size of Google and Bing’s indexes over a nine-year period. These resources are part of this ISSI 2015 paper.

    This page contains the original data and the list of infrastructure changes used in our 2015 ISSI paper on estimating indexing size of Web search engines:

    Antal van den Bosch, Toine Bogers, Maurice de Kunder. A Longitudinal Analysis of Search Engine Index Size. In: Proceedings of ISSI 2015, June 2015

  • Analyzing movie-related information needs (2015)

    Analyzing movie-related information needs (2015)

    Everyday information behavior in the movie domain is still relatively unexplored. What kind of information seeking needs to do people have in the movie domain and what makes a movie relevant? These resources are part of our 2015 iConference poster paper on investigating these and other questions.

    This page contains the IMDB movie forum threads and annotations described in our 2015 iConference paper analyzing movie-related information needs:

    Toine Bogers. Searching for Movies: An Exploratory Analysis of Movie-related Information Needs. In: Proceedings of iConference 2015, pages ?-?, March 2015

  • Motivations for using social news sites (2014)

    Motivations for using social news sites (2014)

    Social news sites allow their users to submit and vote on online news stories, thereby bypassing the authority and power of traditional newspaper editors. These resources are part of our work decribed in our 2014 iConference paper on exploring what motivates users of social news sites, such as Reddit, to participate in this collaborative editorial process.

    This page contains the survey questions used for investigating the motivation of Reddit users as described in our 2014 iConference paper:

    Toine Bogers and Rasmus Nordenhoff Wernersen. How ‘Social’ are Social News Sites? Exploring the Motivations for Using Reddit.com. In: Proceedings of iConference 2014, pages 329-344, March 2014

  • Domain-specific expert search (2013)

    Domain-specific expert search (2013)

    Traditionally, relevance assessments for expert search have been gathered through self-assessment or based on the opinions of co-workers. In our 2013 CSTA workshop paper, we introduced three benchmark datasets for expert search that use conference workshops for relevance assessment. Our data sets cover entire research domains as opposed to single institutions and provide a larger number of topic-person associations.

    This page contains the domain-specific expert search test collections described in our 2013 CSTA workshop paper:

    Georgeta Bordea, Toine Bogers, Paul Buitelaar. Benchmarking Domain-specific Expert Search Using Workshop Program Committees. In: Proceedings of the 2013 CIKM Workshop on Computational Scientometrics: Theory & Applications, pages 19-24, October 2013

  • Serendipity on Twitter (2013)

    Serendipity on Twitter (2013)

    Serendipity has received much attention in the scientific literature, but this is mostly focused on the role it plays in scientific discovery and information seeking. In our 2013 iConference paper we examine how and how often Twitter users use the concept to describe meaningful coincidences in their everyday life.

    This page contains our annotations for two of the Twitter data sets described in our 2013 iConference paper:

    Toine Bogers and Lennart Björneborn. Micro-serendipity: Meaningful Coincidences in Everyday Life Shared on Twitter. In: Proceedings of iConference 2013, pages 196-208, February 2013

  • UvT Expert Collection (2007-2012)

    UvT Expert Collection (2007-2012)

    Expertise retrieval has received significant interest in the field of information retrieval. To facilitate the study of expert search at universities and other knowledge-intensive organisations we have created an expert search test collection based on a bilingual crawl of a major Dutch university.

    There are two versions of the UvT Expert Collection. The latest version can be found here and is described in our 2012 JASIST article:

    Richard Berendsen, Maarten de Rijke, Krisztian Balog, Toine Bogers, Antal van den Bosch. On the Assessment of Expertise Profiles. Journal of the American Society for Information Science, vol. 64, no. 10, pages, 2024-2044, October 2013


    The first version of the UvT Expert Collection is still available here and is described in our 2007 SIGIR paper:

    Krisztian Balog, Toine Bogers, Leif Azzopardi, Maarten de Rijke, Antal van den Bosch. Broad Expertise Retrieval in Sparse Data Environments. In: SIGIR ‘07: Proceedings of the 30th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, pages 551-558, July 2007