Much of eye behavior. is so subtle that we react to it only on the【C8】______ level. The next time you have a conversation with someone who makes you feel liked, notice what he does with his eyes.【C9】______ are he looks at you more often than is usual with glances a little longer than the【C10】______ You interpret this as a sign — a polite one — 【C11】______ he is interested in you as a person【C12】______ just in the topic of conversation. Probably you also feel that he is both【C13】______ and sincere.
All this has been【C14】______ in elaborate experiments.【C15】______ sit and talk in the psychologist's【C16】______ , innocent of the fact that their eye behavior. is being【C17】______ from a one-way vision screen. In one fairly typical experiment, subjects were【C18】______ to cheat while performing a task, then were interviewed and observed. It was found that those who had cheated met the eyes of【C19】______ less often than was normal, an indication that "shifty eyes" — to use the mystery writers' stock phrase—can actually be a【C20】______ to an attempt to deceive or to feelings of guilt.
【C1】

A. state
B. assumption
C. balance
D. coherence