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@ARTICLE{Arnrich_What_does_your_chair_know_about_your_stress_level_2009,
    author = {Arnrich, Bert and Setz, Cornelia and La Marca, Roberto and Tr{\"{o}}ster, Gerhard and Ehlert, Ulrike},
  keywords = {arnrich_sitting, arnrich_stress, SEAT},
     title = {What does your chair know about your stress level?},
   journal = {IEEE Transactions on Information Technology in Biomedicine},
    volume = {14},
    number = {2},
      year = {2010},
     pages = {207-214},
       doi = {10.1109/TITB.2009.2035498},
  abstract = {The inferred cost of work-related stress call for early prevention strategies. In this, we see a new opportunity for affective and pervasive computing by detecting early warning signs. This work goes one step towards this goal. A collective of 33 subjects underwent a laboratory stress intervention while a set of physiological signals was collected. In this work we investigate whether affective information related to stress can be found in the posture channel during office work. Following more recent work in this field we directly associate features which are derived from the pressure distribution on a chair with affective states. We found that nervous subjects reveal higher variance of movements under stress. Furthermore we show that a person-independent discrimination of stress from cognitive load is feasible when using only pressure data. A supervised variant of a self organizing map which is able to adapt to different patterns of stress responses reaches an overall accuracy of 73.75\% with unknown subjects.}
}