The effects of arousal and valence on facial electromyographic asymmetry during blocked picture viewing
Access Status
Authors
Date
2011Type
Metadata
Show full item recordCitation
Source Title
ISSN
School
Collection
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.
Related items
Showing items related by title, author, creator and subject.
-
Purkis, H.; Lipp, Ottmar; Edwards, M.; Barnes, R. (2009)The arousal value of a stimulus influences its salience, whereby higher arousal should lead to faster processing. However, in previous research, participants consistently made faster valence judgments for low arousal, ...
-
Mallan, K.; Lipp, Ottmar; Libera, M. (2008)Affect modulates the blink startle reflex in the picture-viewing paradigm, however, the process responsible for reflex modulation during conditional stimuli (CSs) that have acquired valence through affective conditioning ...
-
Craske, M.; Waters, A.; Lindsey Bergman, R.; Naliboff, B.; Lipp, Ottmar; Negoro, H.; Ornitz, E. (2008)Aversive conditioning and extinction were evaluated in children with anxiety disorders (n=23), at-risk for anxiety disorders (n=15), and controls (n=11). Participants underwent 16 trials of discriminative conditioning of ...