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Dissertation Information for Ben Oruma

- Ben Oruma

- Ph.D.

- Library and Information Science

- Case Western Reserve University (USA) (1983)

- Tefko Saracevic

- Kamlesh Mathur
- Miranda Pao
- William M. Shaw Jr.

MPACT Status: Fully Complete

Title: The Relationship Between Exhaustivity and Consistency at the Optimum Indexing Level

Abstract: The product of human indexing is superior in performance to that of automatic indexing. But human indexing is beset by the persistent problem of inconsistency. Inconsistency has been identified as the major bottleneck associated with manual indexing. This age-long problem has so far defied conventional remedies. The present investigation proposes that while inconsistency would occur as a rule, an optimum consistency can be achieved for each indexing exercise by the interplay of the changes in consistency values with different levels of exhaustively. This hypothesis states that a definite relationship may be shown to exist between the optimum consistency level and a specific and predictable level of exhaustively. It is advanced here that the optimum
consistency level may coincide exactly with the optimum exhaustively level in which case the latter, which has long been advocated , as a criterion for determining the terminal indexing point, would be authenticated as an appropriate criterion.

To test this hypothesis, two experiments are set up
which involved the indexing of part of the 1400 Cranfield Collection in the subject field of aerodynamics. In the first part of experimentation the productivity of three indexers was measured in order to establish their respective optimum exhaustively levels. In the second part, the consistency of the three pairs of indexers was measured in order to determine their respective consistency optimums. In the analysis, an examination of how the optimum exhaustively relates to the optimum consistency was conducted to show how definite and predictable the relationship is -if indeed there is a relationship.

The results confirm that a statistical relationship does exist between consistency and level of exhaustively and, more specifically, between the optimum consistency and the optimum exhaustibility. There is however, no exact overlap between the optimum consistency and the optimum - exhaustively such as would authenticate the continued
use of the optimum exhaustively, as an appropriate
terminal point. As a result, it is recommended that the
appropriate terminal point in manual indexing would be a resonance between the two optimums identified.

MPACT Scores for Ben Oruma

A = 0
C = 0
A+C = 0
T = 0
G = 0
W = 0
TD = 0
TA = 0
calculated 2008-01-31 06:01:22

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Students under Ben Oruma

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