They found that source memory functions better than destination memory，in part because of the direction in which that information is travelling.

　　To study the differences between source and destination memory，the researchers did an experiment on 60 university students，according to a New York Times report.The students were asked to associate 50 random(随意的)facts with the faces of 50 famous people.Half of the students“told”each fact to one of the faces，reading it aloud when the celebrity’s picture appeared on a computer screen.The other half read each fact silently and saw a different celebrity picture afterward.

　　When later asked to recall which facts went with which faces，the students who were giving information out(destination memory)scored about 16 percent lower on memory performance compared with the students receiving information(source memory)．

　　The researchers concluded that outgoing information was less associated with its environmental context(背景)—that is，the person—than incoming information.

　　This makes sense given what is known about attention.A person who is giving information even little facts，will devote some mental resources to thinking about what is being said.Because our attention is finite(有限的)，we give less attention to the person we are giving information to.

　　After a second experiment with another group of 40 students，the researchers concluded that self-focus is another factor that undermines destination memory.

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