Funnel plot with observed and imputed studies. SabarimuruganShanthi KumarasamyChellan BaxiSiddhartha DeviArikketh JayarajRama 2019 <p>Large studies appear outside the funnel and tend to cluster on one side of the funnel plot. Smaller studies appear toward the bottom of the graph, and (since there is more sampling variation in effect size estimates in the smaller studies) will be dispersed across a range of values.</p>