Christof Monz and Maarten de Rijke

In: Working Notes for the Cross Language Evaluation Forum Workshop (CLEF 2001), 2001, ERCIM-01-W04, pp. 165-169.

This paper describes the official runs of our team for CLEF-2001. We took part in the monolingual task, for Dutch, German, and Italian. The focus of our experiments was on the effects of morphological analyses such as stemming and compound splitting on retrieval effectiveness. Confirming earlier reports on retrieval in compound splitting languages such as Dutch and German, we found improvements to be around 25% for German and as much as 55% for Dutch. For Italian, lexicon-based stemming resulted in gains of up to 25%.

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@InProceedings{monz:01univ,
  author = 	 {Monz, C. and de~Rijke, M.},
  title = 	 {University of Amsterdam at CLEF 2001},
  booktitle = 	 {Working Notes for the Cross Language 
                  Evaluation Forum Workshop {(CLEF 2001)}},
  pages =	 {165--169},
  year =	 2001
}