Saturday, 27 October 2012

Fused response: hearing lips, seeing voices

When you play this clip for the first time, play it with your eyes closed.

 Listen to what the man is saying. Now, play it again with your eyes open. 

Do you hear BA-BA, GA-GA, or DA-DA?

Most adults (98%) think they are hearing “DA” – a so called “fused response” – where the “D” is a result of an audio-visual illusion. In reality you are hearing the sound “BA”, while you are seeing the lip movements “GA”.

The McGurk effect was first described in McGurk, H. and J. MacDonald (1976). "Hearing lips and seeing voices." Nature 264: 746-748.


As the BBC's Horizon explains:

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