But he said transcranial random noise stimulation could help more people because it had the potential to improve the ability to add, subtract or multiply a string of numbers in your head - not just new number learning.

BBC: Brain stimulation promises 'long-lasting' maths boost

The doll's one interactive feature--a string on the back of its head that allows users to change its eye color with a yank--does little to humanize it.

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The attendees, including European Central Bank head Jean Claude Trichet, are gathering just weeks after the Bernanke Fed halted a string of 17 straight interest rate increases over the last two years, holding its overnight rate to 5.25% after 17 straight increases over the last two years.

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Efforts to hold talks have been hit by a string of setbacks, including the assassination in September of Burhanuddin Rabbani, the head of the peace council, which had been liaising with the militant group.

BBC: Afghan Taliban back Western proposal for Qatar office