Stephen Lam/Reuters
They're easy to miss. Mark Zuckerberg pictured.
- Mark Zuckerberg will testify before Congress this week, to explain how Facebook mishandled user data during the Cambridge Analytica scandal.
- Body language expert Chris Hadnagy outlined the kinds of verbal and nonverbal behaviors to watch out for during the testimony.
- Those behaviors include hand-rubbing, excessive blinking, and hedging questions.
Mark Zuckerberg is due to testify before Congress Tuesday and Wednesday, to explain how Facebook mishandled user data during the Cambridge Analytica scandal.
As Business Insider's Shona Ghosh reported, Zuckerberg is currently being coached by experts on how to answer questions smoothly during the testimony.
Yet the content of Zuckerberg's responses isn't the only thing worth paying attention to.
Christopher Hadnagy, a body language expert and author of "Unmasking the Social Engineer," told Business Insider about the subtle behaviors to watch out for when Zuckerberg is speaking. Some of those behaviors are nonverbal - think blinking excessively - while some are verbal - think switching from "I" to "we" in the middle of an answer.
Hadnagy cautions that none of these behaviors definitively prove that Zuckerberg is lying. What they do suggest is that he's uncomfortable, which could potentially mean he's not telling the truth.
Below, we've listed five of the most intriguing behaviors to watch for in Zuckerberg's testimony, and what they might convey.