Development and Evaluation of a Digital Game Intervention Targeting Children Vulnerable to ADHD

The goal of this clinical trial is to learn whether a self-administered digital game can improve attention, memory, and planning and reduce ADHD-like symptoms in children aged 6-12 in Hong Kong who have subclinical or vulnerable ADHD symptoms. The main questions it aims to answer are: Does playing a 30-minute digital game 5 times per week for 8 weeks improve sustained attention, memory, and planning? Does it reduce parent- and teacher-rated inattention and hyperactivity/impulsivity symptoms compared with an active control game (Tetris)? Researchers will compare a first-wave group that receives the digital game first and then Tetris with a second-wave group that receives Tetris first and then the digital game, to see if the digital game produces greater improvements. Participants will: Be screened for subclinical ADHD using parent and teacher questionnaires. Play the \"Lucky Panda\" digital game or Tetris for 30 minutes, 5 times a week for 8 weeks, then switch to the other activity for another 8 weeks. Complete computer-based tasks measuring attention, memory, and planning at three time points: before the study, after the first 8 weeks, and after the second 8 weeks. Have their parents and teachers complete ADHD symptom questionnaires at the same three time points. Have parents report their child\'s interest in the game, adherence, and other digital game habits. This study focuses on children with subclinical symptoms, not children already diagnosed with ADHD or receiving ADHD treatment. If effective, the game may offer an accessible early self-help intervention while families wait for professional care.