Fig. 4From: Development of a digital biomarker and intervention for subclinical depression: study protocol for a longitudinal waitlist control studyKeys. Graphic illustration of the number of keys collected in the study. The number is increased after each interaction with Breeze. Helen Galliker created images specifically for this study as part of her employment at the Center for Digital Health Interventions. The Center for Digital Health Interventions holds the copywriter to all imagesBack to article page