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1 .This is Scientific American 60-Second Mind, I'm Christie Nicholson. Got a minute?
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2 .Our memories are inaccurate, more than we'd like to believe.
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3 .And now a study demonstrates one reason: we apparently add current experiences onto our memories.
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4 .Study subjects examined the location of objects on a computer screen against a background of an underwater ocean scene.
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5 .Researchers then showed the subjects a fresh screen with a different background, this time a photo of farmland.
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6 .And the subjects had to place an object in the same position as it was on the original screen.
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7 .And they always placed the object in the wrong position.
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8 .The researchers then presented three objects on the original ocean background.
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9 .One was in the original location, another was in the location the subject just chose in the previous task and the third was in a new location.
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10 .The subject was asked to pick the original location of the object in the original ocean background.
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11 .And instead of choosing the original correct location, they always picked the position they had chosen.
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12 .That is, they now believed the position they'd picked on the farm scene was the original position on the ocean background.
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13 .The study is in the Journal of Neuroscience.
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14 .The researchers note that recent and easily retrievable information "can overwrite what was there to begin with."
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15 .Consider that next time you hear eyewitness testimony.
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16 .Thanks for the minute, for Scientific American 60-Second Mind. I'm Christie Nicholson.
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