Meta-analysis of The Effectiveness Working Memory Interventions in Children with Attention Deficit Hyperactivity Disorder and Comparing Their Working Memory with Normal Children

Hyperactivity disorder is one of the most common chronic developmental disorders that has always been of interest to researchers and therapists. So far, several studies have been conducted to evaluate and improve cognitive problems such as working memory function in children with this disorder. The purpose of this study was to collect and combine the results of these studies and calculate their effect size using a meta-analysis research model in order to achieve a more comprehensive view on the difference between the working memory of children with attention deficit hyperactivity disorder with healthy children, as well as the effectiveness of interventions on it. 23 studies (10 comparisons and 13 interventions) that were accepted methodologically were selected and meta-analysis was performed on them. The tool was a meta-analysis checklist. The meta-analysis findings showed that the effect size of the comparison of working memory in children with attention deficit hyperactivity disorder with normal children was 1.21 (p According to Cohen table, both sizes of the effect obtained in this research are high and this confirms the existence of the difference between the working memory of children with attention deficit hyperactivity disorder and healthy children and also shows the effectiveness of the interventions