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Table 3 Positive Specific Agreement among pairs of social taggers on PubMed citations

From: Social tagging in the life sciences: characterizing a new metadata resource for bioinformatics

  CiteULike Connotea
  Mean PSA N pairs measured Mean terms per post Mean PSA N pairs measured Mean terms per post
String 0.11 19782 2.49 0.14 13156 3.06
Standardized String 0.13 19782 2.49 0.16 13156 3.06
Concepts 0.39 9128 1.39 0.31 4022 1.86
Types 0.43 9128 1.36 0.38 4022 1.72
Groups 0.52 9128 1.29 0.45 4022 1.56