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PLoS Med. 2007 April; 4(4): e166.
Published online 2007 April 24. doi:  10.1371/journal.pmed.0040166
PMCID: PMC1876423

Training of Peer Reviewers: Validation of a 5-Point Rating Scale

We regret that in our paper in the January issue of PLoS Medicine [1], we failed to cite an important recent study [2] that validates a simple 5-point quality rating score virtually identical to the one we used, and which we find more efficient than scores with multiple subscales. We apologize for the omission of this helpful research.


Michael Callaham (ude.fscu.enicidem@clm)

University of California San Francisco, San Francisco, California, United States of America

Funding: The author received no specific funding for this article.

Competing Interests: The author has declared that no competing interests exist.


  • Callaham ML, Tercier J. The relationship of previous training and experience of journal peer reviewers to subsequent review quality. PLoS Med. 2007;4:e40. doi: 10.1371/journal.pmed.0040040. [PMC free article] [PubMed]
  • Landkroon AP, Euser AM, Veeken H, Hart W, Overbeke AJ. Quality assessment of reviewers' reports using a simple instrument. Obstet Gynecol. 2006;108:979–985. [PubMed]

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