Table 4.

Standardised parameters describing total, direct, and indirect effects for model 2 (n = 4201)

	Estimate [95% CI]	p value	Mediation ratio
Total effect (combined effect of all below paths)	0.258 [0.193 to 0.320]	< 0.001	100%
Direct effect (SES→educational achievement)	0.158 [0.095 to 0.221]	< 0.001	61%
Bootstrapped indirect effect (SES→working memory→ educational achievement)	0.100 [0.076 to 0.125]	< 0.001	39%
Bootstrapped indirect effect (SES→inhibition→educational achievement)	0.001 [-0.003 to 0.006]	0.643	< 1%

Note: Mediation ratio was calculated by dividing the effect estimate by the total effect estimate