Courtesy also includes proper behavior on the street. Proper street behavior requires a nice 62 of attention and inattention. You are supposed to look at a 63 just enough to show that you’re 64 of his presence. If you look too little, you appear haughty or furtive, too much and you’re 65 Usually what happens is that people eye each other 66 they are about eight feet apart, at which point both cast 67 their eyes. Sociologist Goffman 68 this as "a kind of dimming of lights." Much of eye behavior is so subtle that we react to it only on the 69 level. The next time you have a conversation with someone who makes you feel liked, notice what he does with his eyes. 70 are he looks at you more often than is usual with glances a little longer than the 71 You interpret this as a sign — a polite one — 72 he is interested in you as a person 73 just in the topic of conversation. Probably you also feel that he is both 74 and sincere. All this has been 75 in elaborate experiments. 76 sit and talk in the psychologist’s 77 , innocent of the fact that their eye behavior is being 78 from a one-way vision screen. In one fairly typical experiment, subjects were 79 to cheat while performing a task, then were interviewed and observed. It was found that those who had cheated met the eyes of 80 less often than was normal, an indication that "shifty eyes" — to use the mystery writers’ stock phrase—can actually be a 81 to an attempt to deceive or to feelings of guilt.