“…In fact, it is a "transdiscipline" whose subject matter is the study and improvement of tools for other disciplines (Scriven, 1991, p. 365). Decades of Evaluation Research applied to Library and Information Science have resulted in a multiplicity of theoretical and empirical studies, from the pioneer work of S.C. Bradford (1948) to the publication of the first international standard on library performance indicators (ISO 11620, 1998) and recent developments in the emergent area of library impact evaluation (Markless and Streatfield, 2006;Imholz and Weil, 2007;Streatfield and Markless, 2009;Mays et al, 2010;Stone and Ramsden, 2013;among others). Within the library evaluation research corpus, meta-evaluation is still an underexplored area (White, 2002;Calvert, 2008;Pinto, 2012).…”