Studying the Role of Individual and Family Factors on Attention Deficit /Hyperactivity Disorder: AMeta-Analysis of Studies Done in Iran

The present study was conducted in order to perform the meta-analytic study of individual and family factors that were effectiveonattention deficit-hyperactivity disorder. For this purpose 25studieswere collected and after entering data into CMA-2 software and sensitivity analysis, one study which was disharmonious with other studies was removed and finally,24 studieswere analyzed. The average effect size(r) in the individual factors was 0.22 and in the family factors it was 0.14. So, according toCohen's criteria, the effect size of individual factors and family factors were reported below the average.In investigating the separated effect size of factors, the variables ofacademic performance, identity crisis, intelligence, working memory, and behavioralmanagement ofparents were higher than average. Due to the significance of Qstatistic based on heterogeneity in these studies, the variables of sex,population, measuring instruments, sampling method and age were entered into the analysis as confounding variables. Z differences test, in the studies related to the individual factors, showed that the effect size was significant for all intervening variables but in examining the family factors, this difference was seen in the variables of sex, population, measuring instruments and sampling method. Due to the obtained average effect size in the above variables, researchers and clinicians should consider the importance of these factors in the evaluation and treatment of attention deficit-hyperactivity disorder. Also, researchers should notice the role of modulators that were listed above in their future studies.