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Abstract

2 experiments investigated how textual factors influence the perception of bibliographical records. Subjects in the 1st experiment browsed indexes for the subject discriptor associated with the displayed record. Results showed that topical and broader descriptors are matched to records more easily than narrower descriptors. In the 2nd experiment, subjects ranked the relevance of descriptors for a bibliographic record. The interaction of 3 textual factors are reported: a semantic distance, direction up or down a generic tree of descriptors; and term overlap. Both experiments found that relevance perceptions degraded systematically with semantic distance, but the rate of degradation was different for top and bottom records. Term overlap modified these effects

Source

Journal of the American Society for Information Science. 46(1995) no.2, S.103-115

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Abstract

Reports 2 experiments that investigated the semantic distance model (SDM) of relevance assessment. In the 1st experiment graduate students of mathematics and economics assessed the relevance relationships between bibliographic records and hierarchies of terms composed of classification heading or help menu terms. The relevance assessments of the classification headings, but not the help menu terms, exhibited both a semantic distance effect and a semantic direction effect as predicted by the SDM. Topical subject expertise enhanced both these effects. The 2nd experiment investigates whether the poor performance of the help menu terms are an experimental design artifact reflecting the comparison of terse help terms with verbose classification headings. In the 2nd experiment the help menu terms were compared to a hierarchy of single word terms where they exhibited both a semantic distance and semantic direction effect

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Content

Beitrag eines Themenheftes: The 50th Anniversary of the Journal of the American Society for Information Science. Pt.1: The Journal, its society, and the future of print

Source

Journal of the American Society for Information Science. 50(1999) no.11, S.1030-1031

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Source

Journal of the American Society for Information Science. 44(1993) no.3, S.137-147

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Source

Journal of the American Society for Information Science. 49(1998) no.8, S.731-741