retrieval effectiveness of table of contents and subject headings
The effectiveness of two modes of subject representation - table of contents (TOC) and subject headings - in subject searching in an online public access catalog (OPAC) system was investigated. The retrieval difference between TOC and the Library of Congress subject headings (LCSH) was statistically significant; the effect of subject domain was not statistically significant; users had better success matching their keywords to TOC than to LCSH; but their keywords often failed to retrieve items similar to the target items. These findings underscore the need to bridge user keywords to both TOC and LCSH.
table of contents subject searching online public access catalogs (opacs) controlled vocabulary subject enhancement