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Issue No. 03 - July-September (2012 vol. 3)
ISSN: 1949-3045
pp: 285-297
Huosheng Hu , University of Essex, Colchester
Mohammad Firoozabadi , Islamic Azad University, Tehran and Tarbiat Modares University, Tehran
Iman Mohammad Rezazadeh , Islamic Azad University, Tehran
S. Mohammad Reza Hashemi Golpayegani , Islamic Azad University, Tehran and Amir Kabir University of Technology, Tehran
ABSTRACT
The real-time adaptation between human and assistive devices can improve the quality of life for amputees, which, however, may be difficult to achieve since physical and mental states vary over time. This paper presents a co-adaptive human-machine interface (HMI) that is developed to control virtual forearm prosthesis over a long period of operation. Direct physical performance measures for the requested tasks are calculated. Bioelectric signals are recorded using one pair of electrodes placed on the frontal face region of a user to extract the mental (affective) measures (the entropy of the alpha band of the forehead electroencephalography signals) while performing the tasks. By developing an effective algorithm, the proposed HMI can adapt itself to the mental states of a user, thus improving its usability. The quantitative results from 16 users (including an amputee) show that the proposed HMI achieved better physical performance measures in comparison with the traditional (nonadaptive) interface ({\rm p\hbox{-}value}<0.001). Furthermore, there is a high correlation (correlation coefficient < 0.9, {\rm p\hbox{-}value} < .01) between the physical performance measures and self-report feedbacks based on the NASA TLX questionnaire. As a result, the proposed adaptive HMI outperformed a traditional HMI.
INDEX TERMS
Training, Prosthetics, Electroencephalography, Entropy, Educational institutions, Real time systems, virtual reality, Human-machine interface, affective measure, forehead bioelectric signals, prosthetics, real-time adaptation
CITATION
Huosheng Hu, Mohammad Firoozabadi, Iman Mohammad Rezazadeh, S. Mohammad Reza Hashemi Golpayegani, "Co-Adaptive and Affective Human-Machine Interface for Improving Training Performances of Virtual Myoelectric Forearm Prosthesis", IEEE Transactions on Affective Computing, vol. 3, no. , pp. 285-297, July-September 2012, doi:10.1109/T-AFFC.2012.3
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