Quantifying Facial Expression Intensity and Signal Use in Deaf Signers

  • Chloé Stoll
    Laboratoire de Psychologie et de Neurocognition (CNRS-UMR5105), Université Grenoble-Alpes
  • Helen Rodger
    Eye and Brain Mapping Laboratory (iBMLab), Department of Psychology, University of Fribourg
  • Junpeng Lao
    Eye and Brain Mapping Laboratory (iBMLab), Department of Psychology, University of Fribourg
  • Anne-Raphaëlle Richoz
    Eye and Brain Mapping Laboratory (iBMLab), Department of Psychology, University of Fribourg
  • Olivier Pascalis
    Laboratoire de Psychologie et de Neurocognition (CNRS-UMR5105), Université Grenoble-Alpes
  • Matthew Dye
    National Technical Institute for Deaf/Rochester Institute of Technology
  • Roberto Caldara
    Eye and Brain Mapping Laboratory (iBMLab), Department of Psychology, University of Fribourg

説明

<jats:title>Abstract</jats:title> <jats:p>We live in a world of rich dynamic multisensory signals. Hearing individuals rapidly and effectively integrate multimodal signals to decode biologically relevant facial expressions of emotion. Yet, it remains unclear how facial expressions are decoded by deaf adults in the absence of an auditory sensory channel. We thus compared early and profoundly deaf signers (n = 46) with hearing nonsigners (n = 48) on a psychophysical task designed to quantify their recognition performance for the six basic facial expressions of emotion. Using neutral-to-expression image morphs and noise-to-full signal images, we quantified the intensity and signal levels required by observers to achieve expression recognition. Using Bayesian modeling, we found that deaf observers require more signal and intensity to recognize disgust, while reaching comparable performance for the remaining expressions. Our results provide a robust benchmark for the intensity and signal use in deafness and novel insights into the differential coding of facial expressions of emotion between hearing and deaf individuals.</jats:p>

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