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Information Storage and…1
Journal of Documentation1
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Sparck Jones, K.1
Sparck Jones, Karen1
Van Rijsbergen, C. J.1
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A Test for the Separation of Relevant and Non-Relevant Documents in Experimental Retrieval Collections
Peer reviewed Peer reviewed
Sparck Jones, K.; Van Rijsbergen, C. J. – Journal of Documentation, 1973
Substantial alterations to a system often have little or no effect on particular collections. This may be due to poor separation of relevant and non-relevant documents. The paper presents a procedure for characterizing this separation, which can show whether proposed modifications of the base system are likely to be useful. (8 references)…
Descriptors: Automatic Indexing, Classification, Cluster Analysis, Databases
Collection Properties Influencing Automatic Term Classification Performance
Sparck Jones, Karen – Information Storage and Retrieval, 1973
Retrieval performance with automatic term classifications for three test collections has been variable. This paper attempts to discover why. The real difference between the collections is in the separation of relevant from non-relevant documents. The separation is so poor that classification cannot be expected to succeed. (14 references)…
Descriptors: Automatic Indexing, Classification, Cluster Analysis, Databases