When we speak, we use much more than just words. We also communicate with our face, our hands, and even our own body. This kind of communication can be called "body language" or "non-verbal communication". Non-verbal communication not only includes how we move our body, but also hand gestures, facial expressions including eye contact, and how we use our voice. Psychologists estimate that between 60% and 80% of all of our communication with other people is non-verbal.