Bibliography: TREC

Okapi at TREC: evaluation experiments with large-scale test collections

  1. Robertson, S.E., Walker, S., Hancock-Beaulieu, M., Gull, A . and Lau, M. Okapi at TREC. In: D. Harman (ed). The First Text REtrieval Conference (TREC-1). Gaithersburg, MD: NIST, 1993. 21-30.

    An account of Okapi's performance in a comparative study of information retrieval from very large text databases, using automatic query processing and manual searching with relevance feedback. Abstract

  2. Robertson, S.E., Walker, S., Jones, S., Hancock-Beaulieu, M., Gull, A. and Gatford, M. Okapi at TREC-2. In: D. Harman (ed). The Second Text REtrieval Conference (TREC-2). Gaithersburg, MD: NIST, 1994, 21-34.

    Discusses new term weighting models to improve Okapi's query expansion functions in the TREC experiments. Describes results of automatic and manual query processing.

  3. Robertson, S.E., Walker, S., Jones, S., Hancock-Beaulieu, M., Gull, A. and Gatford, M. Okapi at TREC-2: the second Text REtrieval Conference (TREC-2). British Library, 1993. (British Library Research Report 6135).

  4. Robertson, S.E., Walker, S., and Hancock-Beaulieu, M. M. Large test collection experiments on an operational, interactive system: Okapi at TREC. (To be published in Information Processing and Management). Abstract

    Reports on the series of experiments conducted in TREC-1 and 2 investigating the probabilistic model, relevance feedback and query expansion, and interaction issues. Covers weighting functions for document length and within-document and within-query term frequency.

  5. Robertson, S. E., and Walker, S. Some simple effective approximations to the 2-Poisson model for probabilistic weighted retrieval. In: W. C. Croft and C. J. van Rijsbergen (eds). Proceedings of the seventeenth annual international ACM-SIGIR conference on research and development in information retrieval, Dublin 1994. London: Springer-Verlag, 1994, 232-241.

    The paper deals with the 2-Poisson model for term frequencies which was developed and tested on the TREC test collection.

  6. Robertson, S. E., Walker, S., Jones, S., Hancock-Beaulieu, M. and Gatford, M. Okapi at TREC-3. In: D. Harman (ed). The Third Text REtrieval Conference (TREC-3). Gaithersburg MD: NIST, 1995. (To be published).

    In this third round of TREC the focus was on passage retrieval, query expansion without relevance feedback and interactive routing experiments.