Twitter users will attempt to prove whether psychic powers really exist when they take part in an experiment this week.
Any Twitter user can take part in the survey
The test, conducted by university professor Richard Wiseman, requires Tweeters to correctly guess a location from five photographs.
Prof Wiseman said: "The instant nature of Tweets allows thousands of people to take part in real time, making it perfect for an extra-sensory perception experiment.
"If the effect does exist then having so many people participate will help detect it."
The University of Hertfordshire lecturer will travel to a mystery UK site, where he will send a tweet asking users to reply with their impressions of his chosen spot.
Prof Wiseman Pic: Antje M Pohsegger
The telepathic test, being conducted with New Scientist magazine, begins on Tuesday and will be repeated at a different location each day until Friday.
Prof Wiseman said there is a one in 125 chance that Tweeters will correctly guess three out of four sites correctly.
Anyone can take part in the experiment by visiting twitter.com/RichardWiseman.
The results of the test should be known on Friday.