What the candidates did not say during final presidential debate

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PHOENIX -- While the exact numbers vary, experts agree that a large portion of what we say doesn't come from our mouths. It's comes from non-verbal communication -- body language, gestures, facial expressions, eye contact, blinking, voice quality and speaking style.

While body position and voice tone are telling, the key often is in the nuances of expression. The subtle variations in facial expressions -- many of which are uncontrollable barely discernible movements displayed for the merest fraction of a second -- can make a world of difference in the message that's conveyed.

Renate Mousseux is an expert in non-verbal communication and what is can reveal. She sat down with 3TV's Kaley O'Kelley to discuss what President Barack Obama and Republican Mitt Romney were not saying during their last face-to-face debate before Election Day.