What do Joe Navarro, M.A., and John R. Schafer, M.A. say the FBI says about detecting that hard-to-define thing called deception? It’s a long story, and it’s in the July 2001 FBI Law Enforcement Bulletin. The fundamental thing, the possible key to it all, they imply, is this:
When individuals tell the truth, they often make every effort to ensure that other people understand. In contrast, liars attempt to manage others? perceptions.