I'd never heard of "personal space" until well into adulthood, but I guess it's been around long before anthropologist Edward T. Hall who developed the theory of proxemics, observing in the 50s and 60s the distance people maintained with each other, and found that different cultures percieve personal space differently. Also it seems individuals choose this space based on factors like prior experience, cultural background, and the kind of relationship they have with the others. I think we all encounter this and are an active participant wherever we go, including canoe tripping.
From Proxemics ~ Psychology Today
What is intimate space?
Our romantic partners, family members, and closest friends are allowed within this space of 0-18 inches. Familiar touch is part of this proximity; the space is close enough to whisper in another’s ear and smell that person’s
scent. We become extremely uncomfortable when this space is breached by people outside our inner circle.
What is personal space?
This is generally called the
personal space bubble. At this range of 18 inches to 4 feet, we are close but not
that close; we can reach over and pat the other person’s back. This space is known as friendly but not intimate. We are in this space when we must speak privately with another person, and the outer limit of this zone is acceptable in close business relationships.
What is social space?
Casual acquaintance and most professional interactions remain within the 4-10 foot
boundary. We can’t touch others at this distance, and it is a safe gap to conduct more formal exchanges. The small classroom setting is a good example of a 4-to-10 foot social space, where students are close enough to get to know their teachers.
What is public space?
Shopping malls, city sidewalks, and airports are planned with this distance requirement. This range is also used in
public speaking, giving a formality to the communication delivered. This type of space does not require eye contact or any personal contact, whatsoever.