PETS

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Computers

A

A computer has been trained to "read"people’s minds by looking at scans1 of their brains. It might lead to better understanding of how and where the brain stores information.

"This might lead to better treatment for language disorders and learning disabilities,"said Tom Mitchell of the Machine Learning Department at Carnegie Mellon University in Pittsburgh, who led the study.

Mitchell’s team used a type of brain scan that could see real-time brain activity. They asked nine students to think of 58 different words, while making the images of their brain activities.

"We gave these instructions to people, 'We are going to show you words and we would like you to see the word and think of its characteristics,’"Mitchell said.

And then they created a kind of "average"image of a word. "If I show you the brain images for two words, the main thing you notice is that they look pretty much alike. However, if you look at them for a while, you might see small differences,"Mitchell said.

"We have the program work out the brain activities over all of the words that somebody has looked at. That gives us the average when somebody thinks of a word, and then we get that average out from all those images,"Mitchell added.

Then the test came.

"After we train on the other 58 words, we can say 'Here are two new words you have not seen, phone and airplane.’"The computer was asked to choose which brain image matched the word "plane".

The computer passed the test. It could predict2 when a brain image was taken when a person thought of the word "airplane"or "phone".

The next step is to study brain activities for phrases.

"I want to basically use that to study language processing in the brain."

Mitchell was surprised at how similar brain activities were among the nine volunteers, although the work was difficult.

For an experiment to work well, the patient must sit or lie very still for several minutes.

Notes:

1. scan n. 扫描

2. predict v. 预报

Read the passage and choose the best answer for each question.

1. The best title of this passage could be _______.

A. Computer Trained to "Read"Mind’s Image of Words

B. The Average Image of a Word

C. The Computer Test

D. Study Brain Activity of a Word

2. It can be inferred from the passage that __________.

A. different people have different images of the same word

B. there is similarity between the words "airplane"and "phone"

C. to complete the experiment, the patient must sit or lie very still for several minutes

D. the scientists will study the computer’s reflection (反应) for phrases

参考答案：A A

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