Figure 1
Screenshot of the data file “Data 1990–2013 with tau values.xlsx”.
Figure 2
Histogram of the between-study standard deviation for mean difference effect sizes (Cohen’s d and Hedges’ g).
Figure 3
Histogram of the between study standard deviation for correlation effect sizes (Pearson’s r).
Figure 4
Histogram of the I2 statistic for all types of effect sizes.