Fig. 4From: Placebo response and effect in randomized clinical trials: meta-research with focus on contextual effectsFunnel plot of all trials included in the main meta-analysis (k = 186). The vertical line shows the average effect size. The median SE(ln[PCE]) is 0.27; i.e., SE(ln[PCE]) larger than this are “smaller studies.” PCE, proportional contextual effectBack to article page