I-Ming Chen

Integrating human-smartphone interactions and actigraphy in digital phenotyping of obesity and depression: Social-physical coherence algorithm development and validation study.

Circadian misalignment is associated with obesity and depression, yet few tools directly quantify the alignment between physical and social activity. We developed social-physical coherence, a digital-phenotyping measure defined as the magnitude-squared coherence between wrist-actigraphy physical activity and smartphone...