Table 3.

Standardised parameters describing total, direct, and indirect effects for model 1 (n = 4201)

	Estimate [95% CI]	p value	Mediation ratio
Total effect (combined effect of all below paths)	0.259 [0.195 to 0.322]	< 0.001	100%
Direct effect (SES→educational achievement)	0.152 [0.089 to 0.215]	< 0.001	58%
Bootstrapped indirect effect (SES→executive function→educational achievement)	0.109 [0.082 to 0.135]	< 0.001	42%
Bootstrapped indirect effect (SES→processing speed→educational achievement)	-0.002 [-0.006 to 0.001]	0.397	< 1%

Note: The mediation ratio was calculated by dividing the effect estimate by the ‘total effect’ estimate