Document (#26592)

Author

Brooks, T.A.

Title

Relevance auras : macro patterns and micro scatter

Source

Advances in classification research, vol.10: proceedings of the 10th ASIS SIG/CR Classification Research Workshop. Ed.: Albrechtsen, H. u. J.E. Mai

Imprint

Medford, NJ : Information Today

Year

2001

Pages

S.23-37

Series

ASIS monograph series

Abstract

Empirical analysis of relevance assessments can Illuminate how different groups of readdes perceive the relationship between bibliographic records and Index terms. This experiment harvested relevance assessments from two groups: engineering students (here after "engineers") and library school students ("librarians"). These groups assessed the relevance relationships between bibliographic records and Index terms for theee literatures: engineering, psychology and education. Assessment included the indexer-selected term (the topically relevant term) as well as broader, narrower and related terms. Figures 1-8 (pages 27-35) show these terms arranged as two-dimensional term domains. Positive relevance assessments plotted across the two-dimensional term domains revealed regular patterns, here called "relevance auras." A relevance aura is a penumbra of positive relevance, emanating from bibliographic records across a term domain of broader, narrower and related index terms. This experiment attempted to compare the relevance auras produced by engineers and librarians at both a macro and micro level of aggregatinn. Relevance auras appeared in data aggregating reader groups and literatures. Micro analyses of individual records, however, showed that relevance auras were ragged or did not develop. Agreement in relevance assessment appears an the individual term basis and often independently of the formation of a relevance aura.

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