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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?
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2 .Many of us spend lots of time tapping out words on a keyboard.
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3 .Now a team of M.I.T.researchers thinks that how we type might reveal hidden information about the state of our brains.
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4 .They designed a study in which a computer could detect which subjects were alert and which were fatigued, just from their typing.
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5 .The researchers focused on how long any particular key was depressed.
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6 .They designed a program to evaluate the keystrokes, and ignore the actual content being typed.
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7 .For the study, 14 volunteers, seven women and seven men, had to type a Wikipedia article when they were fully alert.
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8 .Then they were woken up about 70 to 80 minutes after they'd fallen asleep, when they were in deep slumber.
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9 .They then had to type out another article while still drowsy.
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10 .The result: how long they held down the keys varied much more when they were sleepy than when they were alert.
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11 .The research will be published in the journal Scientific Letters.
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12 .In their write up the team says that such a system could be useful as a safety feature on software programs for night shifts, to identify users who have become incapacitated by sleepiness.
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13 .A variation on the program could help diagnose or monitor neurodegenerative diseases such as Parkinson's by tracking changes in someone's ability to manipulate the common keyboard.
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14 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Cynthia Graber.
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