In the study, the researchers asked 489 people to read four news stories about events that were related to the topics they ranked as the most interesting, and four stories about events related to the topics they rated as the least interesting. In each case, three of these events really did occur, but the fourth one was made up.

　　It turned out that people tended to remember the stories of the topics they said they were more interested in compared with the topics they were not interested in. However, the participants also tended to store more false memories related to the topics they were interested in compared with the topics they were not interested in, the researchers found.

　　The more people know about a topic, the more memories related to this topic they have stored in their brains, the researchers said. Therefore, when a person meets new information on this topic, that information may find traces of similar memories that have already stored in the brain, Greene said.

　　"This can result in a sense of familiarity or recognition of the new material, leading to the conviction (确信) that the information has been met before and is in fact an existing memory," Greene said. In other words, this new material or information may "feel" familiar and therefore the person may believe it must be true, he said.

　　Learning more about how false memories work may help protect against the harmful results of them, such as when eyewitness accounts(证言) of crimes are faulty.

4. What Ciara said in Paragraph 2 suggests that you shouldn't _________.

A. forget the frequency of false memory.

B. lie to someone with different memories.

C. believe faulty memories of other people.

D. completely trust your memory.

5. In the study, people who were interested in a topic________.

A. were less likely to form false memories related to it

B. tended to remember false information about it

C. could remember any information about it easily

D. wanted to know more about it

6. What's the main idea of the text?

A. The harm of false information.