“…In general, the effect coefficients had positive/ meaningful effects on academic achievement of the related applications. In this context, this result obtained from the studies included in meta-analysis was consistent with the master's theses (Akdal, 2011;Aydın, 2011;Bacak, 2008;Çalışkan, 2006;Kayahan, 2010;Şahintürk, 2012;Yıldız, 2012;Yılmaz, 2006), PhD theses (Aktamış, 2007;Parker, 2008;Tezci, 2002) and articles (Altıntaş, Özdemir & Kerpiç, 2013;Gündoğan, Arı &Gönen, 2013;Kim & Kim, 2010;Naeini & Masood, 2012) which were conducted nationally and internationally in different years. In addition, the meta-analytic studies performed internationally by Davis (2009) and Feist (1998) had also positive effect sizes.…”