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Abstract  

Although co-citation techniques are very powerful structuring tools, the use of science policy indicators based on co-citation has often been criticized, especially on ISI research fronts. A major issue is the small fraction of literature retrieved, i.e. the recall rate problem. Our investigations indicate that at the level of micro/meso studies high recall rates can be achieved by (a) the use of appropriate clustering techniques limiting singletons and (b) the enrichment of cocited cores by medium-cited items. This combination of appropriate clustering and extension of recall proves to be efficient, provided that careful trade-offs are sought between the extension and relevance of recall. It leads to a reassessment of the performance of the co-citation approach for structuring scientific fields and providing related indicators not limited to the leading edge. It also opens new opportunities for comparison/combination with other relational methods such as co-word analysis.

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Abstract  

In advanced methods of delineation and mapping of scientific fields, hybrid methods open a promising path to the capitalisation of advantages of approaches based on words and citations. One way to validate the hybrid approaches is to work in cooperation with experts of the fields under scrutiny. We report here an experiment in the field of genomics, where a corpus of documents has been built by a hybrid citation-lexical method, and then clustered into research themes. Experts of the field were associated in the various stages of the process: lexical queries for building the initial set of documents, the seed; citation-based extension aiming at reducing silence; final clustering to identify noise and allow discussion on border areas. The analysis of experts’ advices show a high level of validation of the process, which combines a high-precision and low-recall seed, obtained by journal and lexical queries, and a citation-based extension enhancing the recall. This findings on the genomics field suggest that hybrid methods can efficiently retrieve a corpus of relevant literature, even in complex and emerging fields.

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Abstract  

Numerous attempts have been made to validate the use of citation as an evaluation method by comparing it with peer review. Unlike past studies using journals, research articles or universities as the subject matter, the present study extends the comparison to the ranking of individual scholars. Results show that citation ranking and expert judgment of communication scholars are highly correlated. The citation method and the expert judgment method are found to work better in smaller research areas and yield more valid evaluation results for more prominent scholars.

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analysis, bootstrapping techniques, the use of core journal sets according to Bradford's Law and hybrid lexical-citation methods (Braun et al. 1997 ; Leydesdorff and Zhou 2007 ; Mogoutov and Kahane 2007 ; Schummer 2004 ; Zitt and Bassecoulard, 2006

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Scientometrics
Authors: Morteza Maghrebi, Ali Abbasi, Saeid Amiri, Reza Monsefi, and Ahad Harati

Benchmarking Project . http://www.science.org.au/policy/nano-report.pdf . Accessed 24 Oct 2010. Zitt , M , Bassecoulard , E 2006 Delineating complex scientific fields by an hybrid lexical-citation method

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citation categorisation method. It describes our search of the bibliometrics’ literature and the way in which the search findings informed our subsequent development of a template that could be used to categorise citations. Method

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The paper proposed the hybrid documents co-citation method, and implemented the ideas into the research work with two procedures. Also based on the datum citing Smalley RE, technology diffusion was traced by the co-citation network in cluster view

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. Bensman , SJ , Leydesdorff , L 2009 Definition and identification of journals as bibliographic and subject entities: librarianship versus ISI journal citation methods and their effect on citation measures . Journal of the American Society for

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knowledge base and by the documents citing them which constitute the more recent evolution of the knowledge base. Further applications stemming from the original co-citation method include visual and network analysis methodologies to study interactions

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Policy 2006 35 1 83 – 104 10.1016/j.respol.2005.08.006 . Zitt , M , Bassecoulard , E . Delineating complex scientific fields by an hybrid lexical- citation method: An application to nanosciences

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