“…Although meta-analyses are very well-known abroad, this method has recently begun to be used in Turkey. Thus the number of meta-analytic studies in the literature of Turkey is few (e.g., Batdı, 2014;Camnalbur & Erdoğan, 2008;Çelik, 2013;Demir & Başol, 2014;Gözüyeşil & Dikici, 2013;Kablan et al, 2013;Kaşarcı, 2013;Kaşarcı, Aydın, Yurt, & Sünbül, 2012;Okursoy, 2009;Özdemirli, 2013;Semerci & Batdı, 2015;Şahin, 2005;Şen & Yılmaz, 2013;Tomakin & Yeşilyurt, 2013;Toraman & Demir, 2016;Yeşilyurt, 2012). A meta-analysis takes studies obtained from the relevant literature as a whole, and identifies the common aspects of these studies in terms of the effectiveness of certain variables (i.e., a particular method of instruction, academic achievement, attitudes towards a course, etc.).…”