Henry G. Small

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HENRY SfAAU lrwtzt.le /or .%cntijfc [n/.rmatio. Philadelphia, Pemqdvmia 191W A now form of document coupling called co-citation is deffned as tfm frequency with which two documents are cifed togother. Th* co-citation frequency of two tcientiflc papers can b. determined by comporing fists of citing documents in the Science Citafien Index and cwn$ing(More)
We explore the possibility of using co-citation clusters over three time periods to track the emergence and growth of research areas, and predict their near term change. Data sets are from three overlapping six-year periods: 1996-2001, 1997-2002 and 1998-2003. The methodologies of co-citation clustering, mapping, and string formation are reviewed, and a(More)
The contributors to this volume represent a formidable group of researchers in the European sociology of science. The title of the book, reminiscent of the titles of papers and the research program of a rival method, co-citation clustering, promises an alternative general method for the mapping of science. The primary technical tool advocated by the authors(More)
Previous attempts to map science using the co-citation clustering methodology are reviewed, and their shortcomings analyzed. Two enhancements of the methodology presented in Part I of the paper-fractional citation counting and variable level clustering—are briefly described and a third enhancement, the iterative clustering of clusters, is introduced. When(More)
In a series of seminal studies Robert K. Merton created a coherent theoretical view of the social system of science that includes the salient features of the formal publication system, thereby providing a theoretical basis for scientometrics and citationology. A fundamental precept of this system is the view of citations as symbolic payment of intellectual(More)
It is proposed that citation contexts, the text surrounding references in scientific papers, be analyzed in terms of an expanded notion of sentiment, defined to include attitudes and dispositions toward the cited work. Maps of science at both the specialty and global levels are used as the basis of this analysis. Citation context samples are taken at these(More)