Personal space is a concept from sociology. The concept talks about two actors (two people). The basic idea behind it is these actors have space around them. The closer they are to each other emotionally, the closer an actor will be able to stand to the other, without being intrusive. The concept was introduced by Edward T. Hall in 1966. Discomfort will result if one actor steps into the personal space of the other, without this being desired. The amount of space a being needs can be classified in two categories: