human instinct - we believe nonverbal expression more the verbal

http://www1.chapman.edu/comm/comm/faculty/thobbs/com401/nonverb.html

Nonverbal Communication

Old folk saying: actions speak louder than words. Research bears this out. When verbal and nonverbal contradict, we tend to believe the nonverbal. For one thing, it is seen as being more difficult to fake. An experiment reported by Zuckerman, DePaulo, and Rosenthal ["Verbal and Nonverbal Communication of Deception," Advances in Experimental Social Psychology 14 (1981): 1-59] showed that virtually everything we use to discern if someone else is lying comes from the nonverbal realm or the paralanguage realm, with the bulk falling in nonverbal."