Samenvatting

How many hours a night do I sleep? What is my average resting heart rate? How physical active am I during the day? Self-monitoring with help of technological devices, including smartphones, mobile applications and electronic sensors, allow individuals to quantify biometrics that they never knew existed. During the last decade, the ‘quantified-self’ movement has become popular among hobbyists, but also among professionals in the medical field. In this article the authors explore the potentials of quantified-self devices for the criminal justice setting. Could, for example, skin conductance measurements help to improve self-awareness among aggressive patients? And could biofeedback intervention with help of a mobile application serve as an alternative intervention program for those who are currently not responsive to traditional correctional therapy? On the other hand, what are the limitations and perhaps ethical concerns when implementing quantified-self devices in the criminal justice setting?