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Issue No. 01 - Jan.-March (2013 vol. 4)
ISSN: 1949-3045
pp: 93-105
O. Amft , ACTLab, Tech. Univ. Eindhoven, Eindhoven, Netherlands
Gerhard Troster , Electron. Lab., ETH Zurich, Zurich, Switzerland
M. Kusserow , Electron. Lab., ETH Zurich, Zurich, Switzerland
ABSTRACT
In this work, we introduce methods for studying psychological arousal in naturalistic daily living. We present an activity-aware arousal phase modeling approach that incorporates the additional heart rate (AHR) algorithm to estimate arousal onsets (activations) in the presence of physical activity (PA). In particular, our method filters spurious PA-induced activations from AHR activations, e.g., caused by changes in body posture, using activity primitive patterns and their distributions. Furthermore, our approach includes algorithms for estimating arousal duration and intensity, which are key to arousal assessment. We analyzed the modeling procedure in a participant study with 180 h of unconstrained daily life recordings using a multimodal wearable system comprising two acceleration sensors, a heart rate monitor, and a belt computer. We show how participants' sensor-based arousal phase estimations can be evaluated in relation to daily activity and self-report information. For example, participant-specific arousal was frequently estimated during conversations and yielded highest intensities during office work. We believe that our activity-aware arousal modeling can be used to investigate personal arousal characteristics and introduce novel options for studying human behavior in daily living.
INDEX TERMS
Heart rate, Acceleration, Wearable computers, Sensors, Monitoring, Biomedical monitoring, Motion control, body motion, Heart rate, Acceleration, Wearable computers, Sensors, Monitoring, Biomedical monitoring, Motion control, daily activity, Arousal estimation, affect monitoring, daily hassles, wearable system, heart rate
CITATION
O. Amft, Gerhard Troster, M. Kusserow, "Modeling arousal phases in daily living using wearable sensors", IEEE Transactions on Affective Computing, vol. 4, no. , pp. 93-105, Jan.-March 2013, doi:10.1109/T-AFFC.2012.37
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