http://www.newscientist.com/nsplus/insight/phones/mobilephones.html
<< But the microwaves did have one completely unexpected effect: they decreased the time subjects took to react to words flashed onto the screen. When "yes" or "no" was displayed, the volunteers were quicker at pressing a matching button if the headset was switched on. The improvement was small--about 4 per cent when the device was set to mimic an analogue phone--but unlikely to be a freak finding, because it was seen in two groups of volunteers. >>
So now you have it, they do no harm but make you think quicker.
<< But the microwaves did have one completely unexpected effect: they decreased the time subjects took to react to words flashed onto the screen. When "yes" or "no" was displayed, the volunteers were quicker at pressing a matching button if the headset was switched on. The improvement was small--about 4 per cent when the device was set to mimic an analogue phone--but unlikely to be a freak finding, because it was seen in two groups of volunteers. >>
So now you have it, they do no harm but make you think quicker.
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