Fig. 4. NMDS ordination plot of user experience themes from exit interviews.

This ordination plot shows study themes (letters) from thematic analysis mapped on the first two dimensions of the NMDS ordination. Gray polygons were drawn around participants’ locations in vector space to indicate trial groups. Themes about helpful aspects of interventions are shown in blue, themes about unhelpful aspects of interventions are shown in orange. “A” stands for web-based advice, “B” stands for biosensors, “SM” stands for smartphone diary self-monitoring, and “F” stands for feedback/coaching.