Table 3.

Written expression model

Indirect and Total Effects
				95% C.I. (a)
Type	Effect	Estimate	SE	Lower	Upper	β
Indirect	Age ⇒ ADHD Symptoms ⇒ Written Expression	0.04707	0.1602	−0.20178	0.48369	0.00611
	Gender ⇒ ADHD Symptoms ⇒ Written Expression	−0.91861	0.7429	−3.14232	−0.00826	−0.03872
	Working Memory ⇒ ADHD Symptoms ⇒ Written Expression	0.81354	0.4772	0.09368	2.13295	0.06943
	Inhibitory Control ⇒ ADHD Symptoms ⇒ Written Expression	−0.07195	0.2403	−0.78985	0.30674	−0.00614
	Set Shifting ⇒ ADHD Symptoms ⇒ Written Expression	−0.17408	0.3191	−1.09724	0.23843	−0.01486
Component	Age ⇒ ADHD Symptoms	−0.28253	0.8240	−1.94676	1.32197	−0.03218
	ADHD Symptoms ⇒ Written Expression	−0.16659	0.0869	−0.34790	−7.12e-4	−0.18986
	Gender ⇒ ADHD Symptoms	5.51429	2.7734	0.00999	10.79343	0.20396
	Working Memory ⇒ ADHD Symptoms	−4.88356	1.5783	−7.86250	−1.72895	−0.36570
	Inhibitory Control ⇒ ADHD Symptoms	0.43193	1.2574	−1.96059	2.93785	0.03235
	Set Shifting ⇒ ADHD Symptoms	1.04498	1.5596	−1.96341	4.10188	0.07825
Direct	Age ⇒ Written Expression	−0.82086	0.7417	−2.31518	0.77009	−0.10656
	Gender ⇒ Written Expression	−1.26777	2.2789	−5.99838	3.19452	−0.05344
	Working Memory ⇒ Written Expression	5.15244	0.9769	3.26507	7.11963	0.43975
	Inhibitory Control ⇒ Written Expression	1.77565	0.9966	−0.32588	3.73705	0.15155
	Set Shifting ⇒ Written Expression	0.18068	1.1688	−2.29740	2.33055	0.01542
Total	Age ⇒ Written Expression	−0.77379	0.7703	−2.28350	0.73592	−0.10045
	Gender ⇒ Written Expression	−2.18638	2.2786	−6.65234	2.27958	−0.09217
	Working Memory ⇒ Written Expression	5.96598	1.1891	3.63535	8.29661	0.50919
	Inhibitory Control ⇒ Written Expression	1.70369	1.0877	−0.42822	3.83560	0.14541
	Set Shifting ⇒ Written Expression	0.00660	1.0820	−2.11412	2.12733	5.64e-4

Note. Confidence intervals computed with method: Bias corrected bootstrap

Note. Betas are completely standardized effect sizes