Table 2.

Main effects results for executive functions and mathematical competence.

	N	K	R	95% CI		Homogeneity test
				Lower	Upper	Q-value	Value of p	I 2
EFs and MS	2,365	18	0.496	0.394	0.585	151.989	0.000	88.815
IN and MS	2,027	17	0.347	0.221	0.462	149.799	0.000	89.319
UP and MS	2,070	17	0.432	0.318	0.533	143.069	0.000	88.817
CF and MS	1,781	14	0.370	0.272	0.460	67.003	0.000	80.598

N, total sample size; K, number of effect sizes; R, effect size; 95% CI, 95% confidence interval.