Emotional valence and arousal affect reading in an interactive way: neuroimaging evidence for an approach-withdrawal framework

Citron, Francesca M. M., Gray, Marcus A., Critchley, Hugo D., Weekes, Brendan S. and Ferstl, Evelyn C. (2014) Emotional valence and arousal affect reading in an interactive way: neuroimaging evidence for an approach-withdrawal framework. Neuropsychologia, 56 1: 79-89. doi:10.1016/j.neuropsychologia.2014.01.002

Author Citron, Francesca M. M.
Gray, Marcus A.
Critchley, Hugo D.
Weekes, Brendan S.
Ferstl, Evelyn C.
Title Emotional valence and arousal affect reading in an interactive way: neuroimaging evidence for an approach-withdrawal framework
Journal name Neuropsychologia   Check publisher's open access policy
ISSN 0028-3932
Publication date 2014-04-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.neuropsychologia.2014.01.002
Open Access Status DOI
Volume 56
Issue 1
Start page 79
End page 89
Total pages 11
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Formatted abstract
• Emotional valence and arousal affect reading interactively.
• Positive high-arousal and negative low-arousal words evoke conflicting reactions.
• Enhanced right insula activation was found in response to conflicting stimuli.
• Insula integrates viscero-sensory and cognitive/evaluative information.
• Enhanced extra-striate cortex activation was found for emotional than neutral words.

A growing body of literature shows that the emotional content of verbal material affects reading, wherein emotional words are given processing priority compared to neutral words. Human emotions can be conceptualised within a two-dimensional model comprised of emotional valence and arousal (intensity). These variables are at least in part distinct, but recent studies report interactive effects during implicit emotion processing and relate these to stimulus-evoked approach-withdrawal tendencies.

The aim of the present study was to explore how valence and arousal interact at the neural level, during implicit emotion word processing. The emotional attributes of written word stimuli were orthogonally manipulated based on behavioural ratings from a corpus of emotion words. Stimuli were presented during an fMRI experiment while 16 participants performed a lexical decision task, which did not require explicit evaluation of a word's emotional content.

Results showed greater neural activation within right insular cortex in response to stimuli evoking conflicting approach-withdrawal tendencies (i.e., positive high-arousal and negative low-arousal words) compared to stimuli evoking congruent approach vs. withdrawal tendencies (i.e., positive low-arousal and negative high-arousal words). Further, a significant cluster of activation in the left extra-striate cortex was found in response to emotional than neutral words, suggesting enhanced perceptual processing of emotionally salient stimuli.

These findings support an interactive two-dimensional approach to the study of emotion word recognition and suggest that the integration of valence and arousal dimensions recruits a brain region associated with interoception, emotional awareness and sympathetic functions.
Keyword Valence
Emotional words
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 074333/Z/04/Z
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Centre for Advanced Imaging Publications
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Created: Wed, 19 Feb 2014, 23:46:37 EST by Sandrine Ducrot on behalf of Centre for Advanced Imaging