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ERIC Number: ED139388
Record Type: RIE
Publication Date: 1975
Pages: 30
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
On-Line Data Bases. II. Search Performance Evaluation and On-Line Data Bases.
Hitchingham, Eileen E.
In an attempt to measure on-line searching performance, test searches of one question conducted by three bibliographic searchers are analysed to determine the effects of search strategy on results. The study reviews retrieved citations for relevance, calculating precision values, and estimated recall for each search. Performance analysis reveals that the "best" search strategy can be determined using different criteria--low cost, better recall, or high recall. The report summarizes findings of previous studies measuring: (1) cost, terminal time, and user satisfaction; (2) precision; and (3) recall. It suggests the performance measure of unit cost per relevant citation determined by cost of terminal time plus cost of off-line prints divided by the number of relevant citations retrieved. Suggested formulas for determining recall values in high recall need searches are defined for institutions with one searcher and institutions with several searchers. (KP)
Publication Type: Reports - Research
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: Council on Library Resources, Inc., Washington, DC.
Authoring Institution: N/A