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Egghe, L. – Journal of the American Society for Information Science, 1987
Pratt's measure C on the class concentration of bibliometric distributions is calculated and interpreted for the laws of Zipf, Mandelbrot, and Lotka and geometric distribution, and comparisons are made of the results. An explicit mathematical formula which unifies disparate theories is derived and tested. (Author/CLB)
Descriptors: Bibliometrics, Classification, Comparative Analysis, Functions (Mathematics)
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Nederhof, A. J.; Noyons, E. C. M. – Journal of the American Society for Information Science, 1992
Reports on a study which compared the research performance of departments in linguistics and literature from universities in the United States, the Netherlands, Italy, and Germany, using database searches to reconstruct publication lists based on analysis of citations. Data are presented on the impact of book publications and articles, as well as…
Descriptors: Citation Analysis, Citations (References), Comparative Analysis, Faculty Publishing
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Prade, Henri; Testemale, Claudette – Journal of the American Society for Information Science, 1987
Compares and expands upon two approaches to dealing with fuzzy relational databases. The proposed similarity measure is based on a fuzzy Hausdorff distance and estimates the mismatch between two possibility distributions using a reduction process. The consequences of the reduction process on query evaluation are studied. (Author/EM)
Descriptors: Comparative Analysis, Databases, Information Retrieval, Mathematical Models
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Yang, Yiming; Wilbur, John – Journal of the American Society for Information Science, 1996
Studies aggressive automated word removal in text categorization in large databases based on corpus statistics to reduce the noise in free texts and to enhance the computational efficiency of categorization. Topics include stop word identification, categorization methods for comparison, tests on four document collections, and evaluation…
Descriptors: Comparative Analysis, Databases, Evaluation Methods, Information Retrieval
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Wilbur, W. John – Journal of the American Society for Information Science, 1992
Describes a procedure for information retrieval testing that is based on the comparison of statistically independent methods of retrieval applied to the same database. The probability ranking principle is discussed, the statistical meaning of relevance is examined, and the methodology is illustrated on a large database of MEDLINE records. (19…
Descriptors: Comparative Analysis, Databases, Information Retrieval, Mathematical Formulas
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Silva, Wagner Teixeira da; Milidiu, Ruy Luiz – Journal of the American Society for Information Science, 1993
Describes the Belief Function Model for automatic indexing and ranking of documents which is based on a controlled vocabulary and on term frequencies in each document. Belief Function Theory is explained, and the Belief Function Model is compared to the Standard Vector Space Model. (17 references) (LRW)
Descriptors: Automatic Indexing, Comparative Analysis, Documentation, Information Retrieval
Peer reviewed Peer reviewed
Hsieh-Yee, Ingrid – Journal of the American Society for Information Science, 1993
Reports on a study that investigated the effects of subject knowledge and search experience on tactics used by novices and experienced searchers in online searches. Results of an experiment conducted with 32 undergraduate students and 32 professional searchers, and implications of the findings for system design are discussed. (52 references) (KRN)
Descriptors: Academic Libraries, Comparative Analysis, Experience, Higher Education
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Elchesen, Dennis R. – Journal of the American Society for Information Science, 1978
A comparative study of the cost effectiveness of retrospective manual and on-line bibliographic searching is described. Individual task times for question analysis, searching, photocopying, shelving and output distribution were measured, and component costs for labor, information, reproduction, physical space and telecommunications calculated. The…
Descriptors: Comparative Analysis, Cost Effectiveness, Graphs, Information Retrieval
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Brookes, Bertram C.; Griffiths, Jose M. – Journal of the American Society for Information Science, 1978
Frequency, rank, and frequency rank distributions are defined. Extensive discussion on several aspects of frequency rank distributions includes the Poisson process as a means of exploring the stability of ranks; the correlation of frequency rank distributions; and the transfer coefficient, a new measure in frequency rank distribution. (MBR)
Descriptors: Comparative Analysis, Correlation, Definitions, Laws
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Wong, S. K. M.; And Others – Journal of the American Society for Information Science, 1991
Discussion of user queries in information retrieval highlights the experimental evaluation of an adaptive linear model that constructs improved query vectors from user preference judgments on a sample set of documents. The performance of this method is compared with that of standard relevance feedback techniques. (28 references) (LRW)
Descriptors: Algorithms, Comparative Analysis, Evaluation Methods, Information Retrieval
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Salton, G.; And Others – Journal of the American Society for Information Science, 1985
In this study, automatic feedback techniques are applied to Boolean query statements in online information retrieval to generate improved query statements based on information contained in previously retrieved documents. Feedback operations are carried out using conventional Boolean logic and extended logic. Experimental output is included to…
Descriptors: Comparative Analysis, Feedback, Man Machine Systems, Online Searching
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Fryser, Benjamin S.; Stirling, Keith H. – Journal of the American Society for Information Science, 1984
Library patrons evaluated two versions of a bibliographic record displayed on cathode ray tube terminal, one representing Library of Congress (LC) format, the other, one of 15 format variations. Patrons generally preferred side heading label and underlining to LC forms, and upper and lower case letters to lower case only. (EJS)
Descriptors: Analysis of Variance, College Libraries, Comparative Analysis, Design Preferences
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Diodato, Virgil – Journal of the American Society for Information Science, 1994
Discusses the results of a survey of 255 librarians and college professors that was conducted to determine their preferences regarding three back-of-the-book index features: word-by-word versus letter-by-letter alphabetizing; line-by-line versus run-on subheading arrangement; and see references versus duplicate entries. (Contains 25 references.)…
Descriptors: Academic Libraries, College Faculty, Comparative Analysis, Filing
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Citera, Maryalice – Journal of the American Society for Information Science, 1998
This study examined differences in individual influence and decision quality across communication media. Participants were 64 introductory psychology students. Results showed that influence for dominating participants remained stable across three media conditions (telephone, computer, and face-to-face). Less dominating participants had higher…
Descriptors: Communication Research, Comparative Analysis, Computer Mediated Communication, Computer Oriented Programs
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Beeson, Betty Spillers; Williams, R. Ann – Journal of the American Society for Information Science, 1985
Presents results of study of 32 children (under five and over five) enrolled in preschool program in midwestern university which investigated when children should be introduced to computers and whether or not computer is perceived as sex-stereotyped activity by young children. Background, procedures, and results are discussed. Twenty-one sources…
Descriptors: Age, Analysis of Variance, Childhood Interests, Comparative Analysis
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