Test–retest reliability
Intra-class correlations (ICC) between the two baselines on the first and second trial day for the cardinal parameters QbActivity, QbInattention and QbImpulsivity were 0.92, 0.86 and 0.89, respectively. ICC for the activity parameters Time Active, Distance, Area and Microevents were 0.93, 0.97, 0.95 and 0.96, respectively. ICC for the attention and impulse control measures Reaction Time, Reaction Time Variation, Omission Error and Commission Error were 0.85, 0.79, 0.90 and 0.83, respectively. All correlations were statistically significant at the 0.001 level.