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Open AccessArticle

A Sitting Posture Monitoring Instrument to Assess Different Levels of Cognitive Engagement

Department of Engineering, University of Roma Tre, Via Vito Volterra, 62, 00146 Rome, Italy
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Author to whom correspondence should be addressed.
Sensors 2019, 19(3), 455; https://doi.org/10.3390/s19030455
Received: 30 November 2018 / Revised: 17 January 2019 / Accepted: 17 January 2019 / Published: 22 January 2019
An office chair for analyzing the seated posture variation during the performance of a stress-level test is presented in this work. To meet this aim, we placed a set of textile pressure sensors both on the backrest and on the seat of the chair. The position of the sensors was selected for maximizing the detection of variations of user’s posture. The effectiveness of the designed system was evaluated through an experiment where increasing stress levels were obtained by administering a Stroop test. The collected results had been analyzed by considering three different time intervals based on the difficulty level of the test (low, medium, and high). A transition analysis conducted on postures assumed during the test showed that participants reached a different posture at the end of the test, when the cognitive engagement increased, with respect to the beginning. This evidence highlighted the presence of movement presumably due to the increased cognitive engagement. Overall, the performed analysis showed the proposed monitoring system could be used to identify body posture variations related to different levels of engagement of a seated user while performing cognitive tasks. View Full-Text
Keywords: posture; cognitive engagement; stress level; pressure sensors; embedded systems; body expression; sensorized seat posture; cognitive engagement; stress level; pressure sensors; embedded systems; body expression; sensorized seat
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MDPI and ACS Style

Bibbo, D.; Carli, M.; Conforto, S.; Battisti, F. A Sitting Posture Monitoring Instrument to Assess Different Levels of Cognitive Engagement. Sensors 2019, 19, 455.

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