Few studies have explored the specificities of contextual modulations of the processing of facial expressions at a neuronal level. This study fills this gap by employing an original paradigm, based on a version of the filmic "Kuleshov effect". High-density EEG was recorded while participants watched film sequences consisting of three shots: the close-up of a target person's neutral face (Face_1), the scene that the target person was looking at (happy, fearful, or neutral), and another close-up of the same target person's neutral face (Face_2). The participants' task was to rate both valence and arousal, and subsequently to categorize the target person's emotional state. The results indicate that despite a significant behavioural 'context' effect, the electrophysiological indexes still indicate that the face is evaluated as neutral. Specifically, Face_2 elicited a high amplitude N170 when preceded by neutral contexts, and a high amplitude Late Positive Potential (LPP) when preceded by emotional contexts, thus showing sensitivity to the evaluative congruence (N170) and incongruence (LPP) between context and Face_2. The LPP activity was mainly underpinned by brain regions involved in facial expressions and emotion recognition processing. Our results shed new light on temporal and neural correlates of context-sensitivity in the interpretation of facial expressions.

How context influences the interpretation of facial expressions: a source localization high-density EEG study on the “Kuleshov effect” / Calbi, M.; Siri, F.; Heimann, K.; Barratt, D.; Gallese, V.; Kolesnikov, A.; Umilta, M. A.. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 9:1(2019), pp. 1-16. [10.1038/s41598-018-37786-y]

How context influences the interpretation of facial expressions: a source localization high-density EEG study on the “Kuleshov effect”

Calbi M.
;
Siri F.;Heimann K.;Gallese V.
;
Kolesnikov A.;Umilta M. A.
2019

Abstract

Few studies have explored the specificities of contextual modulations of the processing of facial expressions at a neuronal level. This study fills this gap by employing an original paradigm, based on a version of the filmic "Kuleshov effect". High-density EEG was recorded while participants watched film sequences consisting of three shots: the close-up of a target person's neutral face (Face_1), the scene that the target person was looking at (happy, fearful, or neutral), and another close-up of the same target person's neutral face (Face_2). The participants' task was to rate both valence and arousal, and subsequently to categorize the target person's emotional state. The results indicate that despite a significant behavioural 'context' effect, the electrophysiological indexes still indicate that the face is evaluated as neutral. Specifically, Face_2 elicited a high amplitude N170 when preceded by neutral contexts, and a high amplitude Late Positive Potential (LPP) when preceded by emotional contexts, thus showing sensitivity to the evaluative congruence (N170) and incongruence (LPP) between context and Face_2. The LPP activity was mainly underpinned by brain regions involved in facial expressions and emotion recognition processing. Our results shed new light on temporal and neural correlates of context-sensitivity in the interpretation of facial expressions.
How context influences the interpretation of facial expressions: a source localization high-density EEG study on the “Kuleshov effect” / Calbi, M.; Siri, F.; Heimann, K.; Barratt, D.; Gallese, V.; Kolesnikov, A.; Umilta, M. A.. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 9:1(2019), pp. 1-16. [10.1038/s41598-018-37786-y]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2866263
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