Abstract
For UFRGS’s first participation in CLEF our goal was to compare the performance of heavier and lighter stemming strategies using the Portuguese data collections for monolingual Ad-hoc retrieval. The results show that the safest strategy was to use the lighter alternative (reducing plural forms only). On a query-by-query analysis, full stemming achieved the highest improvement but also the biggest decrease in performance when compared to no stemming. In addition, statistical tests showed that the only significant improvement in terms of mean average precision, precision at ten and number of relevant retrieved was achieved by our lighter stemmer.
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© 2007 Springer-Verlag Berlin Heidelberg
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Orengo, V.M., Buriol, L.S., Coelho, A.R. (2007). A Study on the Use of Stemming for Monolingual Ad-Hoc Portuguese Information Retrieval. In: Peters, C., et al. Evaluation of Multilingual and Multi-modal Information Retrieval. CLEF 2006. Lecture Notes in Computer Science, vol 4730. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74999-8_12
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DOI: https://doi.org/10.1007/978-3-540-74999-8_12
Publisher Name: Springer, Berlin, Heidelberg
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