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Abb. 23: Test Collections (according to Griffiths Luckhurst & Willett 1986 [->] and Dumais, 1991 [->])

Name Domain Content 4.
Documents
5.
Terms / Doc.
6. Queries 7.
Terms / Query
8.
Rel./ Query
Keen Librarianship, Information Science title, Indexterms (manual) 800 9,8 63 10,3 14,9
Cranfield Aerodynamics Indexterms (manual) 1400 28,7 225 8,0 7,2
Evans INSPEC title 2542 6,6 39 27,5 23,1
Harding* INSPEC title, abstracts 2472 36,3 65 32,4 22,6
LISA** Library and Information Abstracts Database 1982 title, abstracts 6004 39,7 35 16,5 10.8
INSPEC INSPEC title, abstracts 12684 36,0 77 17,9 33,0
UCKIS Chemical Abstract Service title 27361 6,7 182 7,4 58,9***
MED Biomedicine (title?) abstracts 1033 50 30 10 23
CISI Library , Information Science (title?) abstracts 1460 45 35 8 50
TIME World news (Time Magazine) articles 425 190 83 8 4
ADI Library science abstracts 82 16 35 5 5

Columns: 4 number of documents; 5: mean number of terms in a document; 6: number of queries; 7: mean number of queries; 8: mean number of relevant documents per query.

* Harding is a subset of Evans, enriched by abstracts and additional queries. ** Relevance judgement for LISA were obtained from manual searches in the printed version of the data base, supplemented in some cases by online or exhaustive manual searches. *** UCKIS suffers from a lack of exhaustive relevance judgements.


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