Gamified Sensor Fusion Platforms Catalyzing 60-Minute Daily Activity Compliance in Children with Sensory Processing Disorders

Sensory Processing Disorders (SPD) profoundly hinder children's ability to sustain daily activities, with compliance rates plummeting beyond 20 minutes in traditional therapies due to sensory overload and motivational deficits. This paper introduces a gamified sensor fusion platform engineered to catalyze 60-minute daily activity compliance, integrating multimodal wearables including 9-axis inertial measurement units (IMUs), photoplethysmography (PPG), and microphones via a hybrid Kalman filter and transformer-based fusion pipeline achieving 94% activity recognition accuracy. Gamification mechanics, rooted in self-determination theory, transform routines like oral-motor exercises and proprioceptive tasks into narrative-driven quests with adaptive rewards, real-time feedback, and family co-play features. In an 8-week randomized controlled trial with 50 children aged 5-10, the platform yielded an 87% compliance uplift (p<0.001), elevating average session duration from 22 to 58 minutes while reducing parental stress by 62%. Sensor fusion mitigated noisy SPD movements, enabling personalized sensory thresholds, and longitudinal analytics informed scalable home deployment. These findings pioneer technology-mediated interventions for pediatric neurodiversity, offering clinicians an open-source framework to bridge engagement gaps and foster long-term behavioural autonomy.