meta analysis of effectievness of bibliotherapy on anxiety disorders and depression in children and adolescence

The objective of research is to use meta-analysis for bibliotherapy on anxiety and depression disorders for children and adolescent in recent ten years in Iran and abroad.The aim was to combine the results of different researches and extract new and comprehensive results and calculate the effect sizes.Also the research studied that how much the type of dependent variables and different moderators could be effective In this study, meta-analysis was considered as a statistical technique for determining,collecting,combining and summarizing the finding that relates to the effect of bibliotherapy in children and adolescent.The population of the present meta-analysis was preceding studies in the field of bibiotherapy and was the all scientific papers published in academic journals,scientific conferences and thesis in the 10-year period (1394-1384) by the subject of bibliotherapy.The papers must be available in different database and have the necessary condition.According to Inclusion criteria of study,14 work by 20 effect size get.To calculate the effect size,CMA software version 2 was used Findings showed that overall effect size was 0.423 that is average according to the table of Cohen.The finding of this meta-analysis is compliance with previous studies that shows bibliotherapy is an effective and efficient approach for treating and helping to treat disorders and preventing and development of children and adolescent. Findings also showed that moderators like type of therapist, contact to therapist are not very effective The effectiveness of bibliotherapy for children and adolescent is average and could be used as a treatment method for depression and anxiety disorders