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Why electricians talk a lot

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Connecting a battery across the front of the head can boost verbal skills, says a team from the US National Institutes of Health.

A current of two thousandths of an ampere (a fraction of that needed to power a digital watch) applied for 20 minutes is enough to produce a significant improvement, says a paper presented to the Society for Neuroscience.

Volunteers were asked to name as many words as possible beginning with a particular letter. Given 90 seconds, most people get around 20 words but after the current was administered

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