Definition: Johari Window is a communication model created by Joseph Luft and Harrington Ingham in 1955, used to describe and understand how we are giving and receiving information and to illustrate and improve the self-awareness between individuals and teams.
The JW has 4 areas:
1. Open / Arena - What is known by the person herself and by others.
2. Hidden / Façade - What is unknown by the person himself but what others know.
3. Blind Spot - What is known by the person herself but not by others.
4. Unknown - What is unknown by the person himself and by others.
The general rule of thumb is that for optimal communication, one should try to expand the Arena.