“…The conceptual framework incorporates recent advice from a growing literature on reviewing research in the natural, social and education sciences (e.g. Barnett‐Page and Thomas, 2009; Cooper and Hedges, 2009; EPPI, 2012; Gough, 2007; Hallinger, 2012; Hunter and Schmidt, 2004; Jackson, 1980; Light and Pillemer, 1984; Lipsey and Wilson, 2001; Sandelowski and Barroso, 2007; Weed, 2005) as well as lessons drawn from our earlier study of reviews of research in educational leadership and management (Hallinger, 2012).…”