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    The effects of arousal and valence on facial electromyographic asymmetry during blocked picture viewing

    Access Status
    Fulltext not available
    Authors
    Zhang, J.
    Lipp, Ottmar
    Oei, T.
    Zhou, R.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhang, J. and Lipp, O. and Oei, T. and Zhou, R. 2011. The effects of arousal and valence on facial electromyographic asymmetry during blocked picture viewing. International Journal of Psychophysiology. 79 (3): pp. 378-384.
    Source Title
    International Journal of Psychophysiology
    DOI
    10.1016/j.ijpsycho.2010.12.005
    ISSN
    0167-8760
    School
    School of Psychology and Speech Pathology
    URI
    http://hdl.handle.net/20.500.11937/34424
    Collection
    • Curtin Research Publications
    Abstract

    The effect of stimulus valence and arousal on facial electromyographic (EMG) asymmetry was investigated to inform the debate about two contrasting hypotheses of emotion: the right hemisphere dominance hypothesis and the valence hypothesis. EMG was recorded from the left and right corrugator and zygomaticus muscles while participants (N = 21) viewed blocks of negative and positive pictures that were high or low in arousal. Ratings of valence and arousal were taken before and after each of the four emotion blocks. Corrugator muscle activity yielded evidence for left hemi-face dominance during high and low arousal negative picture blocks whereas zygomaticus muscle activity yielded evidence for right hemi-face dominance during high arousal positive picture blocks, especially early during the picture sequence. This pattern of results is consistent with the valence hypothesis. © 2010 Elsevier B.V.

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