From:  Cognitive control in children with ADHD and subthreshold ADHD: an eye-tracking study

 Eye-tracking metrics (mean ± SD) by group and condition.

ConditionGroupMean fixation duration on ball (ms)Proportion of trial on ball (%)Latency to return gaze to ball after distractor (ms)
No interferenceTD485.2 (60.1)86.3 (5.2)-
Subthreshold ADHD420.5 (55.4)78.1 (6.3)-
ADHD400.3 (50.2)75.4 (6.0)-
Visual interferenceTD440.6 (55.2)80.1 (6.0)480.3 (80.5)
Subthreshold ADHD380.4 (50.0)*72.2 (6.1)*620.7 (100.2)*
ADHD350.2 (45.3)*68.0 (5.4)*720.5 (110.3)*
Auditory interferenceTD420.8 (50.3)78.4 (5.1)470.2 (90.4)
Subthreshold ADHD360.6 (50.2)*70.3 (6.2)*650.1 (100.1)*
ADHD330.4 (45.1)*65.2 (5.0)*750.3 (120.2)*

Mean fixation duration reflects the stability of visual focus on the target. Proportion of trial on the ball indicates sustained attentional engagement, expressed as the percentage of total trial time spent fixating on the target. Latency to return gaze to the ball after distractor onset represents the efficiency of attentional reorientation following distraction (measured only under interference conditions). Higher fixation duration and proportion values, along with lower reorientation latencies, indicate better attentional control. *: p < 0.05 vs. TD.