Illustrators can signal truthfulness. Truthful people tend to use nonverbal gestures that sync with the activities they are describing. Liars must choose their words carefully, which causes stress.

When we communicate, we use more than just words. The way we stand or sit, the way we gesture, and even the pitch of our voice help contribute to our message. A famous researcher of body language, ...

Next time you are having a conversation with someone, notice how much of the content is communicated without words. Let’s say your boss calls you to her office, hands you your evaluation report, and ...