Irenaus Eibl-Eibesfeldt defined behaviour as, “Behaviour consists of patterns in time.” These patterns can be any type of movement, i.e. facial expressions, vocal sounds or change in appearance and other.
Thinking is also considered as a behaviour and it can be observed by reading the brains electrical activity.
The concept of embodied language proposes that people understand each other both by listening to their words and observing gestures and body language. Thinking happens not only with silent language but also with gestures and body language.