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Studies to Compare Retrieval Using Titles with That Using Index Terms
Peer reviewed Peer reviewed
Olive, G.; And Others – Journal of Documentation, 1973
The performance of a selective dissemination of information service based on computer scanning of Nuclear Science Abstracts tapes was compared with a current awareness service based on visual scanning of journals and reports by information specialists. (6 references) (Author/SJ)
Descriptors: Comparative Analysis, Evaluation, Information Retrieval, Relevance (Information Retrieval)
An Evaluation of Feedback in Document Retrieval Using Co-Occurrence Data.
Peer reviewed Peer reviewed
Harper, D. J.: Van Rijsbergen, C. J. – Journal of Documentation, 1978
Reports experiments with a term weighting model incorporating relevance information in which it is assumed that index terms are distributed dependently. It is argued that, if high recall searches are required, relevance feedback based on the modified dependence model may be superior to the Boolean search. (Author/VT)
Descriptors: Evaluation, Feedback, Information Retrieval, Library Research
Computer-Based Current Awareness Services
Peer reviewed Peer reviewed
Leggate, P. – Journal of Documentation, 1975
Surveys the literature of the field. Includes a 152-item bibliography. (PF)
Descriptors: Databases, Evaluation, Information Centers, Information Retrieval
An Exact Formulation of Bradford's Law.
Peer reviewed Peer reviewed
Leimkuhler, Ferdinand F. – Journal of Documentation, 1980
Demonstrates, with an example, a relatively simple method for fitting Bradford's law to empirical data to estimate the number of journals and articles in a subject collection. An exact discrete formulation illustrates Bradford's law as a special case of the Zipf-Mandlebrot "rank frequency" law. (Author/RAA)
Descriptors: Bibliographies, Citations (References), Evaluation, Library Collections