García-Pérez, M. A. (En prensa). Accuracy and completeness of publication and citation records in the Web of Science, PsycINFO, and Google Scholar: A case study for the computation of h indices in Psychology. Journal of the American Society for Information Science and Technology . [ link ].
[T]he validity of journal impact factors for any purpose whatsoever has recently been questioned because the method by which they are computed is neither transparent nor reproducible (Brumback, 2008a, 2008b; Carrió, 2008; Hernán, 2008; Joseph&Hoey, 1999; Porta & Álvarez-Dardet, 2008; Rogers, 2002; Rossner, van Epps & Hill, 2007, 2008; Seglen, 1997b; The PLoS Medicine Editors, 2006; Wilcox, 2008) and also because of the ease with which journal impact factors can be manipulated (Agrawal, 2005; Brumback, 2009; Cameron, 2005; Della Sala & Brooks, 2008; Falagas &Alexiou, 2007, 2008; Lavie, 2009; Opatrný, 2008; Reedijk & Moed, 2008; Schutte & Švec, 2007; Seglen, 1997b; Sevinc, 2004; Topo Universitario, 2008 , van Diest, Holzel, Burnett, & Crocker, 2001, Yu & Wang, 2007). [Pg. 1 of preprint)]
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