Figure 2From: Meta-analytic methods for neuroimaging data explainedForest (left) and funnel (right) plots of the effect size of the differences in global gray matter volume between patients with obsessive-compulsive disorder and healthy controls (using a random-effects model). On the funnel plot, the included studies appear to be symmetrically distributed on either side of the mean effect size, suggesting no publication bias towards positive or negative studies.Back to article page