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Ensafi E, Atadokht A, Mikaeili N, Narimani M, Rostami R. (2019). The effectiveness of non-invasive treatments on obsessive- compulsive disorder: A meta-analysis. Journal of Psychological Science. 18(75), 297-306.
URL: http://psychologicalscience.ir/article-1-292-en.html

Background: several studies have shown non-invasive brain stimulation techniques caused decrease in psychological symptoms in patient with obsessive-compulsive disorder. but could we show this through a meta-analysis study? Aims: In this paper, we review the efficacy of transcranial direct current stimulation and repetitive transcranial magnetic stimulation on psychopathological symptoms via meta-analysis in patients with obsessive-compulsive disorder. Method: A total of 10 studies were selected for this meta-analysis. The data were gathered from the following databases: scientific journals of psychology, PubMed, ScienceDirect, Springer, SID based on methodological conditions, topic and research design. The effect size of each study was calculated. Results: based on the result of this meta-analysis, the combined effect size of transcranial direct current stimulation (p<0/0028) and repetitive transcranial magnetic stimulation (p<0/0069) effect in reducing obsessive-compulsive symptoms was found to be significant and large according to Cohen’s table. Conclusions: non-invasive brain stimulation was found to have a large effect in reducing obsessive-compulsive symptoms in patients with obsessive- compulsive disorder.