What you have to do?

This video-clip shows several demonstrations using simple meaningless syllables. In each, you will be asked to pay attention to what you hear the person in the screen say. You will be asked to hear the syllable three times while watching the video normally (audio-visual condition) and then, hear the syllable three more times but with your eyes closed (audio-only condition). You will realize that you *hear* different things depending on whether you *see* the speaker or not.