When several different people look at the same person, it is not unusual for each of them to see different things; when you alone observe one behavior or one person at two different times, you may see different things. The following are but some of the factors that lead to these varying perceptions(感知，认知):
Each person’s perceptions of others are formed by his or her own cultural conditioning, education, and personal experiences.
Sometimes perceptions differ because of what we choose to observe and how we deal with what we’ve observed. It is not necessarily true that person’s perception is based on observations of a particular person. Your observations may be totally controlled by some. Your observations may be totally controlled by what others have told you about this person; or you may focus（聚焦） primarily on the situation or role relationship. Most people do not use the same yardstick to measure their parents, their friends, and strangers.
Sometimes we see only what we want to see what may be obverse to others because of our own needs, desires, or temporary emotional states. This is a process known as selective perception. Selective perception is obviously more difficult when contradictory（矛盾的）information is particularly obvious, but it can be done. We can ignore (忽视) the misdeed—“He’s basically a good boy, so what I saw was not shoplifting.” We can reduce the importance of the contradictory information—“All kids get into mischief(顽皮). Taking a book from the bookstore isn’t such a big deal.” We call change the meaning of the contradictory information—“It wasn’t shoplifting because he was going to pay for it later.”
72．The first factor given by the author that affects our perception is           .
A．what we see and what we hear
B．cultural background and personal experiences
C．experiences one learns from others
D．critical measures taken by other people
73．While one observes a particular person         .
A．he is likely to take everything into consideration
B．he pays more attention to the person’s advantages
C．children often differ from grown – ups in perception
D．his perception may be affected by other people’s opinions
74．Observation of the same person by two people at the same time may differ because         .
A．their yardsticks are not the same    
B．either of them may be slow to catch information
C．the time for observations is not long enough
D．each of them uses different language to express his/her impressions
75．The worst thing in selective perception is that         .
A．perceived information runs against your desire 
B．it contains some private feelings that may be wrong
C．importance of the contradictory information can be praised
D．the same information may not be dealt with in the same way