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1 .This is Scientific American 60-Second Mind, I'm Christie Nicholson. Got a minute?
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2 .A lot of people just don't feel quite human without that morning cup of coffee.
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3 .Now a study finds that the enhanced sense of well-being that caffeine can cause is reflected in our perception of words.
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4 .Specifically, caffeine increases the ability to recognize words associated with positive thoughts,
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5 .but doesn't provide the same boost for words with negative or even neutral associations.
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6 .The research is in the journal PLoS One.
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7 .Scientists assigned 66 subjects to one of two groups.
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8 .Half got a 200 mg caffeine tablet, a dose equal to almost three cups of coffee.
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9 .The other half received a sugar tablet.
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10 .Thirty minutes later the volunteers were shown strings of letters, and had to decide as fast as they could if a string formed a word or was just gibberish.
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11 .The volunteers recognized words with positive associations much faster than either negative or neutral words.
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12 .Other studies have shown that positive words tend to be recognized more quickly,
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13 .but the caffeine increases the gap.
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14 .So next time you wake up with a grumpy sweetheart, your compliments might be appreciated more if they have a cup of coffee.
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15 .Thanks for the minute, for Scientific American 60-Second Mind. I'm Christie Nicholson.
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