Document (#13219)

Author

Bellardo, T.
Saracevic, T.

Title

Online searching and search output : relationships between overlap, relevance, recall and precision

Source

Proceedings of the 50th Annual Meeting of the American Society for Information Science 1987. Ed.: C. Chen

Imprint

Medford, NJ : Learned Information

Year

1987

Pages

S.11-13

Abstract

A recent study begun at Case Western Reserve University and continued at Rutgers University compared the transcripts of 200 DIALOG searches conducted by 36 experienced searchers on real questions submitted by academic and industrial researchers. Relevance judgements by the researchers were used to give recall and precision scores to each search result. Findings included: a low degree of overlap between searches on the same question in selection of search terms or items retrieved; the more often an item was retrieved by different searchers, the more likely it was to be judged relevant; recall and precision were not necessarly inversly related; there was a significant positive impact on recall/precision from using more cycles (a sequence from selecting terms to displaying results); serious uncorrectd errors were a major problem in poor searches and proper selection of terms a key to successful searches.

Theme

Retrievalstudien

Aid

DIALOG

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5. Saracevic, T.; Kantor, P.: Online searching : still an imprecise art (1991) 0.31

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