Testing For The Paranormal
What methods can you use to test for the paranormal?
In testing paranormal claims and they come in all kind of different varieties. So the important thing is as far as I am concerned, is to adopt a scientific approach and secondly to try and carry out a fair test. So if someone approaches me and they claim that they have abilities which lay outside the realms of explanation for conventional science. Then the first thing is to find out from them what their claim is, under what conditions they operate, and what would prevent it from working. And trying to set up a well controlled test that they agree in advance is a fair test. It is very important that you test them in a way that they are happy with and then go ahead and you can carry out your test.
How do you test someone who claims to be telepathic?
If someone claims that they can read someone else's mind then that is fairly straight forward to test. We put one person in one room, the sender; we put the receiver in the other room, a good distance away. We do our best to rule out any possibility of what we call sensory cueing, i.e. the person who is supposed to be doing the guessing picking up the information in some other way than via telepathy. We try to rule out any possibility of cheating and we give them a number of trials where one person is trying to send a randomly selected target to the receiver, we work out how many they get right, and we see whether that is a statistically significant figure in terms of what we would expect to get just by guess work. So it's fairly easy to describe, in practice it can be quite difficult to do it because you have to know all the possible things that you need to control for and of course some of the claims are not as straight forward as that. But the important thing is that you find out what the claim is, you design your test around it, and you make sure that the person you're testing agrees that it's a fair test in advance.
What is James Randi's 1m Paranormal Challenge, and has anyone ever passed it?
James Randi is an American conjurer and debunker of the paranormal. And for many, many years now, he has an offer over $1 million to anyone who can prove, under controlled conditions that they have some kind of psychic ability. Now, lots of people have put themselves forward to try and claim this money and so far everyone's failed. So, it's pretty good evidence in itself that although people may sincerely believe that they do have psychic powers; when you actually put it to test properly, those powers always seem to fail.
What sort fo evidence would convince you that the paranormal exists?
It's not at all unusual for me to be told lots and lots of amazing stories from people about paranormal experiences that they themselves have personally had or that someone they know and trust has had, and that they find convincing. The problem for me, as a psychologist, is that that kind of evidence on its own is never going to convince me. And the reason for that is that psychologists are all too aware of how our own perception can fool us, of how our own memories can fool us. And even things like hallucinations, people tend to think that hallucinations are something that only ever happen to people who have serious mental problems. That's just not the case. They're much more common than people realize. So once you get into this area, you realize there are all these other kinds of possible explanations for the weird experiences that people have. So even if I were the one who had the experience, even if I thought I had seen a ghost or had a near death experience, that in itself should not be convincing. There are other possible explanations for that. So the only kind of evidence that will ever convince me will be that that comes from well-controlled scientific studies.