Guiraud detalla cómo los movimientos del cuerpo (kinésica) funcionan como signos de comunicación no verbal. Estos gestos pueden ser:
Elena smiled. Guiraud had pointed out that while many body language signs are culturally learned—like the thumbs-up or the bow—some are deeply rooted in our biological hardware. The startle response, the widening of the eyes, and the specific physical reaction to a loss of physical equilibrium were universal.