The impact of concept map visualizations on the information behavior, perceptions of performance, learning and use with novices in the information retrieval context

2021 ◽  
Author(s):  
Jodi Christine Williams
2020 ◽  
Vol 68 (4) ◽  
pp. 576-598
Author(s):  
Alexandra Haddad ◽  
James Sauer ◽  
Jeremy Prichard ◽  
Caroline Spiranovic ◽  
Karen Gelb

2021 ◽  
Author(s):  
Ellen Souza ◽  
Gyovana Moriyama ◽  
Douglas Vitório ◽  
André C. P. L. F. de Carvalho ◽  
Nádia Félix ◽  
...  

The main purpose of stemming is to reduce the inflected words into its root form or stem. Thus, words can be mapped to the same concept, improving the process of information retrieval, regarding its ability to index documents and to reduce data dimensionality. However, the efficiency of those algorithms varies according to different aspects. Also, studies in the field area reached contrasting conclusions. This work assesses the use of stemmers in the retrieval of legislative documents written in Portuguese. Four stemmers together with BM25 were evaluated in two legislative corpora from the Brazilian Chamber of Deputies. RSLP-S and Savoy stemmers showed the best improvements in the information retrieval pipeline.


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