TY - GEN
T1 - Comparing four technologies for measuring postural micromovements during monitor engagement
AU - Witchel, Harry J.
AU - Healy, Aoife
AU - Needham, Rob
AU - Westling, Carina
AU - Chockalingam, Nachiappan
PY - 2012/8/28
Y1 - 2012/8/28
N2 - Objective metrics of engagement are valuable for estimating user experience or progression through interactional narratives. Postural micromovements of seated individuals during computer engagement have been previously measured with magnetic field sensors and chair-mounted force matrix detection mats. Here we compare readings from a head-mounted accelerometer, single camera sagittal motion tracking, and force distribution changes using floor-mounted force plates against a Vicon 8-camera motion capture system. Measurements were recorded on five participants who were watching or interacting with a computer monitor. Our results show that sagittal and coronal plane measurements for Vicon, the accelerometer and the single camera produced nearly identical data, were precisely synchronized in time, and in many cases proportional in amplitude. None of the systems tested were able to match the Vicon's measurement of yaw.
AB - Objective metrics of engagement are valuable for estimating user experience or progression through interactional narratives. Postural micromovements of seated individuals during computer engagement have been previously measured with magnetic field sensors and chair-mounted force matrix detection mats. Here we compare readings from a head-mounted accelerometer, single camera sagittal motion tracking, and force distribution changes using floor-mounted force plates against a Vicon 8-camera motion capture system. Measurements were recorded on five participants who were watching or interacting with a computer monitor. Our results show that sagittal and coronal plane measurements for Vicon, the accelerometer and the single camera produced nearly identical data, were precisely synchronized in time, and in many cases proportional in amplitude. None of the systems tested were able to match the Vicon's measurement of yaw.
KW - Engagement measurement
KW - Human-computer interaction (HCI)
KW - Monitor engagement
KW - Motion capture
KW - Postural micromovements
KW - Usability
KW - User experience (UX)
UR - http://www.scopus.com/inward/record.url?scp=84875440171&partnerID=8YFLogxK
U2 - 10.1145/2448136.2448178
DO - 10.1145/2448136.2448178
M3 - Conference contribution
AN - SCOPUS:84875440171
SN - 9781450317863
T3 - ACM International Conference Proceeding Series
SP - 189
EP - 192
BT - ECCE 2012 - European Conference on Cognitive Ergonomics 2012
T2 - 30th European Conference on Cognitive Ergonomics, ECCE 2012
Y2 - 28 August 2012 through 31 August 2012
ER -