Cognitive-Motor Training With the DextEgg in Children With ADHD

Attention Deficit Hyperactivity Disorder (ADHD) is frequently accompanied by deficits in executive functions and fine motor skills, which affect daily activities, academic performance, and health-related quality of life. The DextEgg is a gamified hand-training device with motion and pressure sensors that connects to a tablet app and allows fine motor exercises to be combined with cognitive demands (inhibition, working memory, cognitive flexibility). This single-center randomized controlled trial evaluates whether a 4-week home-based cognitive-motor training with the DextEgg improves fine motor skills and executive functions in children aged 8 to 12 years with ADHD, compared with a motor-only DextEgg training of identical dose. Fifty children will be randomized 1:1 and complete 20 home-based sessions (5 per week, 35 minutes each). Assessments take place at baseline, after the intervention, and at 3-month follow-up.

Inclusion Criteria: * Age 8 years 0 months to 12 years 11 months * Clinical ADHD diagnosis according to DSM-5, confirmed by a physician or psychologist * Written informed consent by legal guardian and assent by the child * Caregiver-reported difficulties in fine motor tasks (e.g., handwriting, tying shoes) * Caregiver-reported executive functioning difficulties in daily life Exclusion Criteria: * Any other significant neurological, developmental, or psychiatric condition that could affect fine motor or cognitive functioning * Participation in another intervention study during the study period * Inability to follow study procedures due to language difficulties or other barriers