The McGurk effect

Close your eyes, play this movie, and listen. Open your eyes, replay and listen again. Is he saying "ba ba" or "da da"? It's called the McGurk effect. The man in this video, and its creator, is Arnt Maasø, associate professor at the University of Oslo.

References include:

http://en.wikipedia.org/wiki/McGurk_Effect
http://www.hf.uio.no/imk/english/people/aca/arntm/
http://www.youtube.com/arnte

I uploaded this a long time ago after grabbing it from an antediluvian webpage Arnt had on his university's site. I let him know that I had put it on this thing called YouTube and volunteered to remove it (since it's his); he actually responded very nicely and said, "the more, the merrier." Thanks Arnt!

Category:

Howto & Style

Tags:

• McGurk
• effect
• optical
• illusion
• audio-visual
• audio
• visual
• perceptual

[astroegg]

oh my it is really different! Did anyone 'hear' something like a duck when listening with eyes open..?

[hmcnally]

@astroegg This thing's been up on YT for like 4 years, and no one has heard the duck! It really gets interesting when you play it backwards...

[Danidano92]

wtf??

I hear (also with closed eyes) and see /gɑ:/ !!

[ultimandco]

if you watch the video with the song, you will percept "Da Da'' ,now close your eyes.

your normaly hear "Ba Ba'' ,then turn off the sound and try to read on his lips. you see the sound "Ga" !

[fcfoxable]

When people are explaining the Mcgurk effect, why do they all pretend to be sheep?

[ezstzy]

i heard "boobs"

[Subparanon]

ba ba both times.

[JuriicLV]

wtf?... it works O__o ))))

[AucklandHD]

Lady Gaga, Lady Baba or Lady Dada?

[Greeb17]

ba ba with eyes closed

ga ga with eyes open while watching the video