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Similarity measures, author cocitation analysis, and information theory

✍ Scribed by Loet Leydesdorff

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
69 KB
Volume
56
Category
Article
ISSN
1532-2882

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The use of Pearson's correlation coefficient in Author Cocitation Analysis was compared with Salton's cosine measure in a number of recent contributions. Unlike the Pearson correlation, the cosine is insensitive to the number of zeros. However, one has the option of applying a logarithmic transformation in correlation analysis. Information calculus is based on both the logarithmic transformation and provides a non‐parametric statistics. Using this methodology, one can cluster a document set in a precise way and express the differences in terms of bits of information. The algorithm is explained and used on the data set, which was made the subject of this discussion.

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