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Seriation and Multidimensional Scaling: A Data Analysis Approach to Scaling Asymmetric Proximity Matrices.
Peer reviewed Peer reviewed
Rodgers, Joseph Lee; Thompson, Tony D. – Applied Psychological Measurement, 1992
A flexible data analysis approach is proposed that combines the psychometric procedures seriation and multidimensional scaling. The method, which is particularly appropriate for analysis of proximities containing temporal information, is illustrated using a matrix of cocitations in publications by 18 presidents of the Psychometric Society.…
Descriptors: Citations (References), Cluster Analysis, Mathematical Models, Matrices
Are There Enduring Patents?
Peer reviewed Peer reviewed
Noma, Elliot; Olivastro, Dominic – Journal of the American Society for Information Science, 1985
A study comparing citations received by patents in given year to number received in subsequent years found that, even though influential patents remain influential, both highly and infrequently cited patents age at same rate. Distribution of patents by number of citations received is stable over time. (17 references) (EJS)
Descriptors: Citations (References), Comparative Analysis, Matrices, Models
Co-Citation Analysis and the Invisible College.
Peer reviewed Peer reviewed
Noma, Elliot – Journal of the American Society for Information Science, 1984
Argues that co-citation methods combine citing behavior of authors by assuming they share common view of scientific literature which affects assessments of dimensionality and clustering of articles. Co-citation matrices, effects of shared point-of-view assumption, and co-citation compared with bibliographic coupling and centroid scaling are…
Descriptors: Bibliographic Coupling, Citations (References), Cluster Analysis, Cluster Grouping
Methodological Citation Differences in Science, Technology, and Social Sciences Literatures.
Peer reviewed Peer reviewed
Hurt, C. D. – Library and Information Science Research, 1985
An examination of methodological referencing patterns for actual physics, engineering, and sociology literature for the year 1983, using a Dunn planned comparison approach, indicates that physics differs from both engineering and sociology, while no difference was found between engineering and sociology. References are given in each sample…
Descriptors: Citations (References), Comparative Analysis, Data Collection, Engineering
Structural Equivalence in a Journal Network.
Peer reviewed Peer reviewed
Doreian, Patrick; Fararo, Thomas J. – Journal of the American Society for Information Science, 1985
Techniques used in contemporary social network analysis are applied to citation data for a network of journals from three time periods--1970/71, 1975/76, 1980/81. Blocks or positions in journal network based on structural equivalence correspond closely to categorization by aims and objectives. Hypotheses concerning journal networks are advanced.…
Descriptors: Citations (References), Cluster Analysis, Cluster Grouping, Information Networks
Structural Equivalence in a Psychology Journal Network.
Peer reviewed Peer reviewed
Doreian, Patrick – Journal of the American Society for Information Science, 1985
Two journal-to-journal matrices for psychology in 1950 and 1960 are analyzed in terms of structural equivalence to test following hypotheses: that journals of a discipline function as a status-role relational system; that interdisciplinary journals are distant from journals of a field; that journal networks have a core-periphery structure. (26…
Descriptors: Citations (References), Cluster Analysis, Comparative Analysis, Hypothesis Testing