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Blindness influences emotional authenticity perception in voices: Behavioral and ERP evidence
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Orientador(es)
Resumo(s)
The ability to distinguish spontaneous from volitional emotional expressions is an
important social skill. How do blind individuals perceive emotional authenticity? Unlike
sighted individuals, they cannot rely on facial and body language cues, relying instead on
vocal cues alone. Here, we combined behavioral and ERP measures to investigate
authenticity perception in laughter and crying in individuals with early- or late-blindness
onset. Early-blind, late-blind, and sighted control participants (n ¼ 17 per group, N ¼ 51)
completed authenticity and emotion discrimination tasks while EEG data were recorded.
The stimuli consisted of laughs and cries that were either spontaneous or volitional. The
ERP analysis focused on the N1, P2, and late positive potential (LPP). Behaviorally, earlyblind participants showed intact authenticity perception, but late-blind participants performed worse than controls. There were no group differences in the emotion discrimination task. In brain responses, all groups were sensitive to laughter authenticity at the P2
stage, and to crying authenticity at the early LPP stage. Nevertheless, only early-blind
participants were sensitive to crying authenticity at the N1 and middle LPP stages, and
to laughter authenticity at the early LPP stage. Furthermore, early-blind and sighted participants were more sensitive than late-blind ones to crying authenticity at the P2 and late
LPP stages.
Altogether, these findings suggest that early blindness relates to facilitated brain processing of authenticity in voices, both at early sensory and late cognitive-evaluative stages.
Late-onset blindness, in contrast, relates to decreased sensitivity to authenticity at
behavioral and brain levels.
Descrição
Palavras-chave
Blindness Voice Authenticity Event-related potentials
Contexto Educativo
Citação
Sarzedas, J., Lima, C. F., Roberto, M. S., Scott, S. K., Pinheiro, A. P., & Conde, T. (2023). Blindness influences emotional authenticity perception in voices: Behavioral and ERP evidence. Cortex. https://doi.org/10.1016/j.cortex.2023.11.005
Editora
Elsevier