Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Funnel plot of effect size estimates (Hedges’ g). The effect size estimates are shown with 95% confidence interval relative to standard error for individual data sets. The point labels correspond to the study labels in Figure 2. The left-most vertical line represent the standardised mean difference under the random-effects model, and the other vertical line (under the triangle) represent the standardised mean difference under the fixed-effects model.
