With this study, it is aimed at examining the effect of the gender and developmental phases on the aggression tendencies of the Turkish students. In this context, the meta-analysis of the studies existing in the literature and covering the Turkish students has been conducted. The examined researches to be included in the analysis have been identified in accordance with certain criteria. As criteria, the following conditions have been sought: inclusion of the studies published between 2004 and 2015, inclusion of child, adolescent, and young adult students in the sample, giving the validity and reliability studies of the measuring tools, the studies being obtained from sources of the published theses and articles; and in the data, the arithmetic mean, standard deviation, and sample size being given. In the research, gender has been found effective on the general aggression scores, at significant level (EDavg = .280, p < .01), and against males at medium level. The general aggression scores from the moderator variables have been found to have a medium level of effect (EDavg = .402, p < .01) on the childhood period, and to have the greatest effect against males.
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 the analysis. The general effect size of the depression with respect to gender has been found to be at low level and on women at relatively higher level. The effect size; for childhood and adolescence periods, which are considered to be the developmental periods, has been found out to be at low level, on young adults and adults at insignificant level, on elders at medium level and on women at relatively higher level. The results have been discussed, within the scope of literature, from the point of view of the effects onwoman depression and elderliness.
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