eTable 3. Statistical procedures used to calculate effect size d.

Available data	Mean, x–standard deviation, s	t statistic, tor F statistic, F group or sample size, n 1 +n 2 = N	Significance level, pgroup or sample size, n 1 +n 2 = N	Chi square, χ ²group or sample size, n 1 +n 2 = N
Formula			t = tinv(p; df) (Microsoft Excel) with Followed by calculation of d using t-statistic (see column 3)
Source	(e2)	(e2)	(e3)	(e4)
Resource	(e5)	(e5)	Microsoft Excel	(e5)

The statistical procedures used depended on the data available from the relevant publications