Dissertation Information for Carolyn Susan SchwartzNAME:
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SCHOOL: ADVISORS: COMMITTEE MEMBERS: MPACT Status: Incomplete - Ambiguous Title: A STUDY OF THE APPLICATION OF POST-RETRIEVAL CLUSTERING IN BIBLIOGRAPHIC DATABASES (ONLINE, SEARCHING, CLASSIFICATION, AUTOMATIC) Abstract: The items retrieved as the result of a search in a large bibliographic database are not typically organized such that relevant references are presented before non-relevant references. In this study, post-retrieval clustering is proposed as an effective method of presenting retrieved results. A clustering algorithm was applied to 48 retrieved sets in two different databases, INSPEC and PSYCINFO. Coefficients of ranking effectiveness (CRE's) were calculated for results presented in reverse accession number order (the default mode in commercially available search systems) and in an order derived from the clustering. A two-alternative t-test was used to evaluate whether the difference between mean CRE's was significant. In all cases, the difference was found to be statistically significant. The conclusion is made that post-retrieval clustering offers an improved method of presentation of retrieved results. Other advantages of clustered results are also discussed. |
MPACT Scores for Carolyn Susan SchwartzA = 3 Advisors and Advisees Graph |