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Authors: Jan Ehlers ; Nikola Bubalo ; Markus Loose and Anke Huckauf

Affiliation: Ulm University, Germany

ISBN: 978-989-758-085-7

Keyword(s): Affective Human-Computer Interface, Pupil Size, Biofeedback, Emotions, Voluntary Control.

Related Ontology Subjects/Areas/Topics: Affective Computing ; Applications ; Biofeedback Technologies ; Biomedical Engineering ; Biomedical Instruments and Devices ; Brain-Computer Interfaces ; Devices ; Human-Computer Interaction ; Pattern Recognition ; Physiological Computing Systems ; Physiology-Driven Computer Interaction ; Software Engineering

Abstract: During the past years, increasing attention is being paid to operationalize pupil dynamics for affective classification (Jacobs, 1996). Thereby it is generally assumed that pupil size displays a genuine impression of user’s cognitive state but defies any voluntary control (Loewenfeld, 1993). Based on Ekman (2008) we applied graphical feedback on pupil diameter changes to utilize mechanisms of operant conditioning to gradually enable voluntary control over pupil size. Participants underwent a training program to exert control by utilizing affective associations to expand pupil size and relaxation strategies to reduce it. As a result, more than half of the participants demonstrated to be able to increase pupil sizes relative to baseline recordings. Training effects did not show up. Furthermore, controlling influence diminishes after about ten seconds. Intentional increase of sympathetic activity seems to be subject to habituation processes that allow central inhibition of parasympatheti c pathways only over a short period. Beside strategy-based factors, physiological mechanisms like baseline pupil activity may determine inter-individual differences in exerting voluntary control. In summary it can be noted that pupil-based communication in HCI extends affective monitoring and may constitute an active input channel to reliably interfere by means of simple cognitive strategies. (More)

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Paper citation in several formats:
Ehlers J., Bubalo N., Loose M. and Huckauf A. (2015). Towards Voluntary Pupil Control - Training Affective Strategies?.In Proceedings of the 2nd International Conference on Physiological Computing Systems - Volume 1: PhyCS, ISBN 978-989-758-085-7, pages 5-12. DOI: 10.5220/0005240000050012

author={Jan Ehlers and Nikola Bubalo and Markus Loose and Anke Huckauf},
title={Towards Voluntary Pupil Control - Training Affective Strategies?},
booktitle={Proceedings of the 2nd International Conference on Physiological Computing Systems - Volume 1: PhyCS,},


JO - Proceedings of the 2nd International Conference on Physiological Computing Systems - Volume 1: PhyCS,
TI - Towards Voluntary Pupil Control - Training Affective Strategies?
SN - 978-989-758-085-7
AU - Ehlers J.
AU - Bubalo N.
AU - Loose M.
AU - Huckauf A.
PY - 2015
SP - 5
EP - 12
DO - 10.5220/0005240000050012

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