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Engaged listeners: shared neural processing of powerful political speeches

Author(s): Schmälzle, Ralf; Häcker, Frank E.K.; Honey, Christopher J.; Hasson, Uri

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Abstract: Powerful speeches can captivate audiences, whereas weaker speeches fail to engage their listeners. What is happening in the brains of a captivated audience? Here, we assess audience-wide functional brain dynamics during listening to speeches of varying rhetorical quality. The speeches were given by German politicians and evaluated as rhetorically powerful or weak. Listening to each of the speeches induced similar neural response time courses, as measured by inter-subject correlation analysis, in widespread brain regions involved in spoken language processing. Crucially, alignment of the time course across listeners was stronger for rhetorically powerful speeches, especially for bilateral regions of the superior temporal gyri and medial prefrontal cortex. Thus, during powerful speeches, listeners as a group are more coupled to each other, suggesting that powerful speeches are more potent in taking control of the listeners brain responses. Weaker speeches were processed more heterogeneously, although they still prompted substantially correlated responses. These patterns of coupled neural responses bear resemblance to metaphors of resonance, which are often invoked in discussions of speech impact, and contribute to the literature on auditory attention under natural circumstances. Overall, this approach opens up possibilities for research on the neural mechanisms mediating the reception of entertaining or persuasive messages.
Publication Date: Aug-2015
Electronic Publication Date: 3-Feb-2015
Citation: Schmälzle, Ralf, Häcker, Frank EK, Honey, Christopher J, Hasson, Uri. (2015). Engaged listeners: shared neural processing of powerful political speeches. Social Cognitive and Affective Neuroscience, 10 (8), 1137 - 1143. doi:10.1093/scan/nsu168
DOI: doi:10.1093/scan/nsu168
ISSN: 1749-5016
EISSN: 1749-5024
Pages: 1137 - 1143
Type of Material: Journal Article
Journal/Proceeding Title: Social Cognitive and Affective Neuroscience
Version: Final published version. This is an open access article.

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