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The Selection of Good Search Terms.
Peer reviewed Peer reviewed
van Rijsbergen, C. J.; And Others – Information Processing and Management, 1981
Describes the use of relevance feedback to select additional search terms and discusses the extraction of these terms from a maximum spanning tree connecting all terms in the index term vocabulary; retrieval effectiveness for different spanning trees is shown to be similar. Eight references are included. (Author/BK)
Descriptors: Cluster Grouping, Feedback, Information Retrieval, Mathematical Formulas
Quality of Indexing in Online Data Bases.
Peer reviewed Peer reviewed
White, Howard D.; Griffith, Belver C. – Information Processing and Management, 1987
Describes study that compared and judged the quality of subject indexing in online bibliographic databases. Documents from medical behavioral science literature are used with terms drawn from MEDLINE, PsychINFO, BIOSIS, and Excerpta Medica. Comparative statistics are presented on how each database links related documents and discriminates among…
Descriptors: Behavioral Sciences, Citation Analysis, Cluster Grouping, Comparative Analysis
Controlled and Uncontrolled Subject Descriptions in the CF Database: A Comparison of Optimal Cluster-Based Retrieval Results.
Peer reviewed Peer reviewed
Shaw, W. M., Jr. – Information Processing and Management, 1993
Describes a study conducted on the cystic fibrosis (CF) database, a subset of MEDLINE, that investigated clustering structure and the effectiveness of cluster-based retrieval as a function of the exhaustivity of the uncontrolled subject descriptions. Results are compared to calculations for controlled descriptions based on Medical Subject Headings…
Descriptors: Bibliographic Records, Cluster Analysis, Cluster Grouping, Comparative Analysis
Subject Indexing and Citation Indexing--Part I: Clustering Structure in the Cystic Fibrosis Document Collection [and] Part II: An Evaluation and Comparison.
Peer reviewed Peer reviewed
Shaw, W. M., Jr. – Information Processing and Management, 1990
These two articles discuss clustering structure in the Cystic Fibrosis Document Collection, which is derived from the National Library of Medicine's MEDLINE file. The exhaustivity of four subject representations and two citation representations is examined, and descriptor-weight thresholds and similarity thresholds are used to compute…
Descriptors: Citation Indexes, Citations (References), Cluster Grouping, Comparative Analysis
A Theoretical Framework for Defining Similarity Measures for Boolean Search Request Formulations, Including Some Experimental Results.
Peer reviewed Peer reviewed
Radecki, Tadeusz – Information Processing and Management, 1985
Reports research results into a methodology for determining similarity between queries characterized by Boolean search request formulations and discusses similarity measures for Boolean combinations of index terms. Rationale behind these measures is outlined, and conditions ensuring their equivalence are identified. Results of an experiment…
Descriptors: Cluster Grouping, Correlation, Indexing, Information Retrieval
An Experiment in Automatic Hierarchical Document Classification.
Peer reviewed Peer reviewed
Garland, Kathleen – Information Processing and Management, 1983
Describes method of automatic document classification in which documents classed as QA by Library of Congress classification system were clustered at six thresholds by keyword using single link technique. Automatically generated clusters were compared to Library of Congress subclasses, and partial classified hierarchy was formed. Twelve references…
Descriptors: Automation, Cataloging, Classification, Cluster Analysis