Dissertation Information for Assadaporn Nuchprayoon NAME: - Assadaporn Nuchprayoon
DEGREE:
- Ph.D.
DISCIPLINE:
- Library and Information Science
SCHOOL:
- University of Pittsburgh (USA) (1996)
ADVISORS: - Robert Korfhage
COMMITTEE MEMBERS: - Louise Su - Donald Shirey - Michael Spring - Shi-Kuo Chang
MPACT Status: Fully Complete
Title: GUIDO: A usability study of its basic information retrieval operations
Abstract: Interfaces for information retrieval have been improved for browsing as well as retrieval purposes. Several visual information retrieval interfaces (VIRIs) have been developed as a result of the research attempting to apply visualization in information retrieval. Visualization in information retrieval can be applied at various levels, such as individual document, a set of documents, and the retrieval process. GUIDO (Graphical User Interface for Document Organization) is designed as one of the VIRIs serving the visualization of document organization and retrieval process. Based on the concept of vector space model, GUIDO allows the use of multiple reference points. Visual displays of the document organization in GUIDO are based on the similarity among the documents and between the document and the reference points. Distance measures are used as similarity measures in GUIDO.
The effect on retrieval of applying multiple reference points together with distance measures in information retrieval systems based on vector space model is yet to be fully analyzed. With the vector space model, documents can be ranked with respect to the similarity to the query. Three metrics are proposed as the distance measures in GUIDO. With multiple reference points, four strategies to combine the similarity values of a document to multiple reference points into a single value are also proposed. The combinations of these three metrics and four retrieval threshold calculations produce different document rankings. The differences in these document rankings and their influences on the user's retrieval performances are investigated in this dissertation.
As the GUIDO is designed as an interface for information retrieval a preliminary usability study of the GUIDO system was conducted in this dissertation study. The study was intended to reveal the user's ability to perform retrieval in GUIDO. It was found that the subjects, after a limited training session, were able to use GUIDO without much difficulty.
The promising outcome of the use of the distance measures with multiple reference points in the GUIDO system merits continuing research. The areas for future studies also presented, such as further usability studies of GUIDO, discovery of cognitive models of distance measure and retrieval threshold calculations, search for other distance measures and retrieval threshold calculations, and search for the matching between similarity measure and retrieval threshold calculation.
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MPACT Scores for Assadaporn Nuchprayoon A = 0
C = 0
A+C = 0
T = 0
G = 0
W = 0
TD = 0
TA = 0
calculated 2008-01-31 06:24:09
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