Digital Biomarker

A quantifiable physiological or behavioral measure collected through digital devices (such as smartphones, wearables, or sensors) that can serve as an indicator of health status, disease progression, or treatment response. In accessibility contexts, digital biomarkers derived from smartphone usage patterns — such as app switching speed, typing patterns, or usage timing — show promise for passively detecting cognitive decline, motor impairments, or changes in mental health without requiring explicit clinical testing. This approach leverages the ubiquity of personal devices to enable continuous, non-invasive health monitoring.