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NLM109954610 |
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DE-627 |
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20231222152439.0 |
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tu |
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231222s2000 xx ||||| 00| ||eng c |
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|a pubmed24n0367.xml
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|a (DE-627)NLM109954610
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|a (NLM)11079902
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Hersh, W
|e verfasserin
|4 aut
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| 245 |
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|a Assessing thesaurus-based query expansion using the UMLS Metathesaurus
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|c 2000
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 08.03.2001
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|a Date Revised 10.12.2019
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|a published: Print
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|a Citation Status MEDLINE
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| 520 |
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|a OBJECTIVES: Assess query expansion using thesaurus relationships and definitions in the UMLS Metathesaurus for improving searching performance
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| 520 |
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|a METHODS: The queries from a MEDLINE test collection (OHSUMED) were expanded using synonym, hierarchical, and related term information as well as term definitions from the UMLS Metathesaurus. Documents were retrieved from a word-statistical retrieval system and assessed for recall and precision based on relevance judgments from the test collection
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| 520 |
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|a RESULTS: All types of query expansion degraded aggregate retrieval performance as measured by recall and precision, although 38.6% of the queries with synonym expansion and up to 29.7% of the queries with hierarchical expansion showed improvement
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| 520 |
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|a CONCLUSIONS: Thesaurus-based query expansion causes a decline in retrieval performance generally but improves it in specific instances. Further research must focus on identifying instances where performance improves and how it can be exploited by real users
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| 650 |
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|a Evaluation Study
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| 650 |
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|a Journal Article
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| 650 |
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|a Research Support, U.S. Gov't, Non-P.H.S.
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| 650 |
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4 |
|a Research Support, U.S. Gov't, P.H.S.
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| 700 |
1 |
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|a Price, S
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Donohoe, L
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Proceedings. AMIA Symposium
|d 1998
|g (2000) vom: 01., Seite 344-8
|w (DE-627)NLM098642928
|x 1531-605X
|7 nnns
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| 773 |
1 |
8 |
|g year:2000
|g day:01
|g pages:344-8
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| 912 |
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|a GBV_USEFLAG_A
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| 912 |
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|a SYSFLAG_A
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| 912 |
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|a GBV_NLM
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| 912 |
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|a GBV_ILN_350
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| 951 |
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|a AR
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| 952 |
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|j 2000
|b 01
|h 344-8
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