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Glossary

McGurk effect
Perceptual phenomenon of integration, where a participant hearing the audio channel of a speaker producing one sound while seeing a video of the speaker producing a different sound will in fact report a third sound.

Example:
If a subject hears /b/ and sees /g/, s/he is fooled into reporting /d/. The confusion is caused because s/he can see that the lips are not involved, so they subconsciously decide against /b/. But what they hear does not match what they expect for /g/, so they believe it to be /d/.

Topic: Perception