Van der Walt, H.E.A.; Brakel, P.A. van: Method for the evaluation of the retrieval effectiveness of a CD-ROM bibliographic database (1991)
0.03
0.033503164 = product of:
0.16751581 = sum of:
0.16751581 = weight(_text_:compact in 3114) [ClassicSimilarity], result of:
0.16751581 = score(doc=3114,freq=2.0), product of:
0.28613505 = queryWeight, product of:
7.5697527 = idf(docFreq=61, maxDocs=44218)
0.037799787 = queryNorm
0.5854432 = fieldWeight in 3114, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
7.5697527 = idf(docFreq=61, maxDocs=44218)
0.0546875 = fieldNorm(doc=3114)
0.2 = coord(1/5)
- Abstract
- Addresses the problem of how potential users of CD-ROM data bases can objectively establish which version of the same data base is best suited for a specific situation. The problem was solved by applying the retrieval effectiveness of current on-line data base search systems as a standard measurement. 5 search queries from the medical sciences were presented by experienced users of MEDLINE. Search strategies were written for both DIALOG and DATA-STAR. Search results were compared to create a recall base from documents present in both on-line searches. This recall base was then used to establish the retrieval and precision of 4 CD-ROM data bases: MEDLINE, Compact Cambrdge MEDLINE, DIALOG OnDisc, Comprehensive MEDLINE/EBSCO
