It’s because personal space — how close we stand to our colleagues, our friends, strangers — varies widely between countries. Sociologists have studied the whys and hows, and they’ve come up with some theories about why these social norms exist. Temperature tends to affect how people define personal space. So do gender and age.

But, they think, our personal boundaries have a lot to do with where we grow up. These researchers sort the world into “contact cultures” (South America, the Middle East, Southern Europe) and “non-contact cultures” (Northern Europe, North America, Asia). In non-contact cultures, people stand farther apart and touch less.

Now, a new study offers even more insight into what people from different countries expect from each other. In it, researchers looked at 9,000 people in 42 countries to understand exactly how personal space is defined in different countries. To do that, they handed each subject a graph showing two figures.

Then they told each subject: Imagine you’re person A. How close should person B stand to you? Does that change if the person is a close friend? A colleague?

After they conducted the surveys, they averaged the results for each of the three categories.

They found that people in Argentina and other South American countries do, in general, require less personal space than people from Asia. In some places, strangers were encouraged to stay away, but friends could crowd in close. In Romania, for example, strangers are supposed to keep their distance. But friends can creep close. In Saudi Arabia, people stand farther from their friends than Argentinians do with strangers. Hungarians want loved ones and strangers at arms length, or at least 75 centimeters.

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Cultures share some commonalities. Women preferred more personal space from strangers than men in almost all of the countries studied. People living in warmer places tended to keep less distance than those in colder climes. And the older you are, the farther away you stand.