Donald Trump gave us a textbook example of one type of an "Insincere Smile" while speaking in Sarasota on Saturday. In fact, for the businessman-turned-politician, this particular nonverbal is a very common one.
At 0:36 (in above video) Trump begins, "You see how diplomatic I've become? [pause] Right?"
The vast majority of the time, a unilateral smile is insincere - and this example is not one of the exceptions (Do you know how to differentiate these?).
Note how the right corner (Trump's right) of his mouth is down-turned, while his left side is vectored upward. This is a classic duplicitous (false) smile (yet not all one-sided smiles signify the same motives). This particular expression signals a disparity from what is being spoken vs. that which is thought-felt. Anytime the body language is saying one thing - and the verbal language is saying another - it's the nonverbal messages which are telling the truth.
A close-up of the above image of a Unilateral and Duplicitous, False Smile captured during 0:39
See also:
Nonverbal Communication Analysis No. 3387: Daniel Radcliffe, James McAvoy, The Graham Norton Show and Body Language
Nonverbal Communication Analysis No. 3367: Donald Trump on Saturday Night Live - Body Language Tells
Nonverbal Communication Analysis No. 3362: Marco Rubio and Alleged Misuse of State Party Credit Card
Nonverbal Communication Analysis No. 3371: John Kasich at the Republican Debate - Body Language
Nonverbal Communication Analysis No. 3364: Jennifer Lawrence accidentally kisses Natalie Dormer on the Mouth - Body Language
Nonverbal Communication Analysis No. 3252: Shark Attacks Surfer Mick Fanning in the midst of competition at J-Bay Open - Body Language of Fear
Nonverbal Communication Analysis No. 3230: Kanye West arrives at Glastonbury - But What Does He Think?
Nonverbal Communication Analysis No. 3320: Pope Francis speaks before the U.S. Congress - Body Language of Boehner and Biden
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