interfaces, Style guides. General Terms

Nowadays, more and more commercial health and fitness sensors (e.g. pedometers, heart rate sensors) are available for customers. While some of the measured values are understandable for average users (e.g. heart rate), some of them are not (e.g. heart rate variability). In this paper we investigate how a person's stress level, derived from the skin conductance, can be visually represented. To do so we handed three early design drafts of an Android widget, showing the real-time stress level, to our study participants. Based on qualitative interviews we identify the most important design factors and give suggestions on how the stress level might be represented in future applications