The aim of this study is to examine the effect size of depression in a Turkish sample with respect to gender and developmental periods. The studies of dissertation and articles completed during the period of 2004-2018 and covering Turkish sample have been examined through the method of Meta Analysis. The studies carried out, with the help of the depression measuring instruments, on a Turkish sample that has not taken any psychiatric diagnosis until that time, have been scanned through, by the use of the data bases such as; Google Academic, EBSCOhost and Web of Science. The criterion based sampling, which is one of the methods of sample selection, has been utilized. In the Meta Analysis; the effect value has been calculated through the use of the Cone Chart and Rank Relevancy Test of Begg and Mazumdar, Forest Chart analysis and Hedges’s g. The random effects model has been utilized in t...

The aim of this study is to examine the effect size of depression in a Turkish sample with respect to gender and developmental periods. The studies of dissertation and articles completed during the period of 2004-2018 and covering Turkish sample have been examined through the method of Meta Analysis. The studies carried out, with the help of the depression measuring instruments, on a Turkish sample that has not taken any psychiatric diagnosis until that time, have been scanned through, by the use of the data bases such as; Google Academic, EBSCOhost and Web of Science. The criterion based sampling, which is one of the methods of sample selection, has been utilized. In the Meta Analysis; the effect value has been calculated through the use of the Cone Chart and Rank Relevancy Test of Begg and Mazumdar, Forest Chart analysis and Hedges’s g. The random effects model has been utilized in t...