www.dailymail.co.uk said:
Most of us have ducked away from a 'madman' in the street, only to realise they are in fact using a Bluetooth headset.
Now a new University of Pennsylvania study shows that wandering along muttering, 'keys, keys, keys' can actually help (normal, sane) people find lost objects.
Saying a word helps focus the mind on something people are looking for - and it works more effectively than seeing a written description.
Repeating the word over and over again helps even more.
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