Unconsciously, we all keep a comfortable distance around us when we interact with other people. This

space between us and another person(1)invisible walls.

The(2)of space changes(3)on the nature of the relationship. For(4), we are usually more comfortable standing closer to family members(5)to strangers. Personality(6)determines the size of the area(7)we are comfortable when talking to people. Introverts (性格内向的人) often prefer(8)with others(9)a greater distance than do extroverts. Cultural styles are important too. A Japanese employer and employee usually stand(10)apart while talking than their American counterparts. Latin Americans and Arabs(11)to stand closer than Americans do when talking.

For Americans, the usual distance in social conversation(12)from about an arm's(13)to four feet. Less space in the American culture may be(14)with either greater intimacy(15)aggressive behavior. The common practice of saying, "Excuse me," for the slightest(16)touching of another person(17)how uncomfortable Americans are if people get too(18). In cultures(19)close physical contact is(20)and even desirable, Americans may be perceived (感觉认为) as cold and distant.