Personal space is a concept on psychology and sociology. The concept talks about two people (the "actors"). They 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.[1]
Discomfort results 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:
Hall's spacing models were based on Heini Hediger's 1955 psychological studies of zoo animals.[2]