Rotating McThatcher Illusion

Finalist of the Best Illusion of the Year Contest 2014 James W. Dias & Lawrence D. Rosenblum University of California, Riverside, USA This illusion demonstrates that our unconscious ability to lipread is influenced by processes considered idiosyncratic to face perception. It combines two well known effects. The McGurk effect shows that our perception of a heard syllable ('ba') is unconsciously influenced by a synchronized lipread syllable ('va') so we report