roles that require multi-tasking and switching between modes of

communication can overstretch brainpower. Telltale signs are altered

speech patterns and blinking more slowly. Now new technology, based on

research from the University of New South Wales, is helping managers

select the right candidates for jobs and identify when workers are

overloaded. In call centres, the smart software can even reallocate

work. Not everyone will be comfortable with "big brother" watching, but

experts say this is one way of avoiding the fallout from too much

information.