Sensing stress with commodity sensors

The Amulet group has been developing sensors, apps, and algorithms for sensing stress, in the field.  In one of the first papers to come out of that effort, presented today in a UbiComp workshop, we explore the potential for detecting stress using a single commodity wearable sensor.

Varun Mishra, Gunnar Pope, Sarah Lord, Stephanie Lewia, Byron Lowens, Kelly Caine, Sougata Sen, Ryan Halter, and David Kotz. The Case for a Commodity Hardware Solution for Stress Detection. In Workshop on Mental Health: Sensing & Intervention, pages 1717-1728, October 2018. ACM. DOI 10.1145/3267305.3267538.

Abstract: Timely detection of an individual’s stress level has the potential to expedite and improve stress management, thereby reducing the risk of adverse health consequences that may arise due to unawareness or mismanagement of stress. Recent advances in wearable sensing have resulted in multiple approaches to detect and monitor stress with varying levels of accuracy. The most accurate methods, however, rely on clinical grade sensors strapped to the user. These sensors measure physiological signals of a person and are often bulky, custom-made, expensive, and/or in limited supply, hence limiting their large-scale adoption by researchers and the general public. In this paper, we explore the viability of commercially available off-the-shelf sensors for stress monitoring. The idea is to be able to use cheap, non-clinical sensors to capture physiological signals, and make inferences about the wearer’s stress level based on that data. In this paper, we describe a system involving a popular off-the-shelf heart-rate monitor, the Polar H7; we evaluated our system in a lab setting with three well-validated stress-inducing stimuli with 26 participants. Our analysis shows that using the off-the-shelf sensor alone, we were able to detect stressful events with an F1 score of 0.81, on par with clinical-grade sensors.


Assembly of New Amulet “Kite.d” Boards Moves Forward

This spring, with a stabilized design code-named “Kite.d”, the Amulet team specified a new board and case design for the latest Amulet revision. Team members Ron Peterson and Taylor Hardin delivered the designs to New Hampshire’s DataEd, and with their assistance facilitated the fabrication of 150 Amulet Kite.d main- and daughter-boards. DataEd facilitated basic electrical testing of the design before delivery, and now that we’ve received them, the team is busy assembling the latest round of Amulets for upcoming studies. Check out some on-site pictures below!

DSCN0791Parts being placed on 6 Amulet Kite.d boards

DSCN0802A technician tests assembled boards for electrical soundness

DSCN0801Amulet team member Taylor Hardin tests functional capabilities of a new unit

George Boateng Featured In Dartmouth News

This week, Amulet researcher George Boateng was lauded in the Dartmouth News. George, who received both his masters and his undergrad degrees from Dartmouth, is now a staff researcher on the Amulet project. In addition to outlining George’s recent awards for his entrepreneurial efforts, the article also delves into his work with Amulet PI David Kotz, and how Amulet was a significant part of George’s academic career. To read more, click below.

Dartmouth News: Exploring Applications of Technology in Health and Wellness