Answer to Dictation 1
Researchers from Paris looked at why mental effort makes us tired.
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Answer to Dictation 2
They found that when people think a lot the brain releases a chemical.
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Answer to Dictation 3
Spend more than six hours working on a task that requires a lot of thought.
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Answer to Dictation 4
A period of rest allows the brain to return to normal.
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Answer to Dictation 5
A power nap can be as short as 20 minutes but can make us feel refreshed.
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Answer to Dictation 6
The research team looked at the behaviour of 40 participants in their research.
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Answer to Dictation 7
Twenty four of these had to perform challenging tasks.
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Answer to Dictation 8
Looking at a computer screen and matching different letters that appeared.
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Answer to Dictation 9
The group who had the more difficult task had higher levels of glutamate.
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Answer to Dictation 10
It would be great to find out more about how glutamate levels are restored.
See the thinking lesson for the whole text.
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