Pupil dilation reflects the authenticity of received nonverbal vocalizations
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2021
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Scientific Reports (Nature)
Resumo
The ability to infer the authenticity of other’s emotional expressions is a social cognitive process
taking place in all human interactions. Although the neurocognitive correlates of authenticity
recognition have been probed, its potential recruitment of the peripheral autonomic nervous system
is not known. In this work, we asked participants to rate the authenticity of authentic and acted
laughs and cries, while simultaneously recording their pupil size, taken as proxy of cognitive efort and
arousal. We report, for the frst time, that acted laughs elicited higher pupil dilation than authentic
ones and, reversely, authentic cries elicited higher pupil dilation than acted ones. We tentatively
suggest the lack of authenticity in others’ laughs elicits increased pupil dilation through demanding
higher cognitive efort; and that, reversely, authenticity in cries increases pupil dilation, through
eliciting higher emotional arousal. We also show authentic vocalizations and laughs (i.e. main efects
of authenticity and emotion) to be perceived as more authentic, arousing and contagious than acted
vocalizations and cries, respectively. In conclusion, we show new evidence that the recognition of
emotional authenticity can be manifested at the level of the autonomic nervous system in humans.
Notwithstanding, given its novelty, further independent research is warranted to ascertain its
psychological meaning.
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Scientific Reports
Palavras-chave
PSICOLOGIA, PSICOFISIOLOGIA, EYE TRACKING, COMUNICAÇÃO NÃO VERBAL, AUTENTICIDADE, MOVIMENTOS OCULARES, PSYCHOLOGY, PSYCHOPHYSIOLOGY, EYE TRACKING, NON-VERBAL COMMUNICATION, AUTHENTICITY, EYE MOVEMENTS
Citação
13. Cosme, G., Rosa, P.J., Lima, C.F. et al. (2021). Pupil dilation reflects the authenticity of received nonverbal vocalizations. Scientific Reports 11, 3733 https://doi.org/10.1038/s41598-021-83070-x