http://www.bbc.co.uk/news/education-20145664

A scientific experiment has found that two mediums were unable to demonstrate that they had special psychic powers.

The test by researchers at Goldsmiths, University of London, tried to establish whether mediums could use psychic abilities to identify something about five unseen volunteers.

The results, carried out under test conditions, did not show evidence of any unexplained powers of insight.

But medium Patricia Putt said this experiment “doesn’t prove a thing”.

More at the link. An unsuprising response from the mediums. If they needed to see and speak to the people, then why did they take the test under the conditions set out? 

Hubris. They may have actually believed their own blather. They may have thought they could guess well enough to count as probable. They may have taken the test so they could claim it had been rigged against them. All the above.