Cost incurred per search Users’ efforts involved in

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Presentation transcript:

Cost incurred per search Users’ efforts involved in Learning how to use the system How it works Getting docs from backup doc. delivery system Users’ time From submission of query to the retrieval of references From submission of query to the retrieval of the actual information

Metadata Recall / Precision Time lag, response time Learning curve Search features Form of presentation – banner? Layout? Integrity? Consistency? Linkages – link to external site? Or .. Navigation Coverage of the collection Usability – appropriateness for intended user?

National Electronic Library for Health at http://www.nelh.nhs.uk Thesaurus available? e.g. anaemia, anemia ; high blood pressure, hypertension ; "aspirin" might be a better option than "NSAIDS" ; general practitioner", "family physician" Phrase search by Default NO stemming Search by metadata Collection rich? (try fever, flu ; how many hits?) How does the web site collect information?

Display results by category No. of records per page = 10 (customizable?) Relevancy? (I don’t know!!) Currency? (try bird flu) The data fields? Full-text available?

Combined Health Information Database at http://chid.nih.gov Full-text available? Search operators .. e.g. adj Phrase search? Thesaurus? Stemming? Help text/guide is enough? Presenation? (old-fashioned!) Sorting? Bibliographic database!