Precision increase and coverage decrease with voting in CiteULike. The X axis indicates the minimum number of times a given UMLS Concept (in green), Semantic Type (in pink), or Semantic Group (in dark blue), would need to be associated with a PubMed citation (through the assignment of a tag by a CiteULike user that could be linked to the Concept) to be considered. The Y axis plots the precision with which these different voted aggregates predict the corresponding MeSH annotations.
Good et al. BMC Bioinformatics 2009 10:313 doi:10.1186/1471-2105-10-313