Bayesian binding and fusion models explain illusion and enhancement effects in audiovisual speech perception.

ABSTRACT: Speech is perceived with both the ears and the eyes. Adding congruent visual speech improves the perception of a faint auditory speech stimulus, whereas adding incongruent visual speech can alter the perception of the utterance. The latter phenomenon is the case of the McGurk illusion, where an auditory stimulus such as e.g. "ba" dubbed onto a visual stimulus such as "ga" produces the illusion of hearing "da". Bayesian models of multisensory perception suggest that both the enhancement and the illusion case can be described as a two-step process of binding (informed by prior knowledge) and fusion (informed by the information reliability of each sensory cue). However, there is to date no study which has accounted for how they each contribute to audiovisual speech perception. In this study,

SUBMITTER: Lindborg A 

PROVIDER: S-EPMC7895372 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature