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: I uploaded this a long time ago after grabbing it from an antediluvian webpage Arnt had on his university’s