Table 4.

Correlations between asymmetry indices (AI) and MOXO-d-CPT subscale scores in the ADHD group (n = 40).

Brain region/asymmetry index	MOXO subscale	r	p	Direction of relationship	Interpretation
Frontal lobe (cortical thickness AI)	Attention	+0.45	0.008	Higher rightward AI → ↑ Attention performance	Rightward asymmetry was associated with fewer omission errors
Parietal lobe (cortical thickness AI)	Timing	+0.38	0.030	Higher rightward AI → ↑ Timing performance	Rightward asymmetry showed a correlation with better temporal control
Anterior cingulate cortex (thickness AI)	Attention	+0.40	0.020	Higher rightward AI → ↑ Attention performance	Rightward ACC asymmetry supports sustained attention
Inferior frontal gyrus (thickness AI)	Impulsivity	−0.42	0.015	Lower AI (leftward) → ↑ Impulsivity	Reduced right IFG asymmetry showed a correlation with more impulsive responses
Amygdala (volume AI)	Hyperactivity	+0.36	0.040	Higher rightward AI → ↓ Hyperactivity	Greater right dominance was associated with lower hyperactivity
Thalamus (volume AI)	Hyperactivity	+0.30	0.070	Trend (ns)	Rightward asymmetry trend toward lower hyperactivity

AI, Asymmetry Index; HAI, Hemispheric Asymmetry Index; ACC, Anterior Cingulate Cortex; IFG, Inferior Frontal Gyrus; MOXO-d-CPT, MOXO-digital Continuous Performance Test; SD, Standard Deviation; ns, non-significant.