I designed a simple procedure to test both the chance-coincidence theory and the unconscious-knowledge theory experimentally [in connection with the psychic ability to know in advance who calls you on the phone). I recruited subjects who said they quite frequently knew who was calling before answering the phone. I asked them for the names and telephone numbers of four people they knew well, friends or family members. The subjects were then filmed continuously throughout the period of the experiment alone in a room with a landline telephone, without a caller ID system. If there was a computer in the room, it was switched off, and the subjects had no mobile phone. My research assistant or I selected one of the four callers at random by the throw of a dice. We rang up the selected person and asked him to phone the subject in the next couple of minutes. He did so. The subject’s phone rang, and before answering it she had to say to the camera who, out of the four possible callers, she felt was on the line. She could not have known through knowledge of the caller’s habits and daily routines because, in this experiment, the callers rang at times randomly selected by the experimenter.
By guessing at random, subjects would have been right about one time in four, or 25 per cent. In fact, the average hit rate was 45 per cent, very significantly above the chance level. None of the subjects was right every time, but they were right much more than they should have been if the chance coincidence theory were true. This above-chance effect has been replicated independently in telephone telepathy tests at the universities of Freiburg, Germany, and Amsterdam, Holland.
In some of our tests, there were two familiar callers and two unfamiliar callers whom the subjects had never met but whose names they knew. The hit rate with unfamiliar callers was near the chance level; with the familiar callers it was 52 per cent, about twice the chance level. This experiment supported the idea that telepathy occurs more between people who are bonded to each other than between strangers.
For some of our experiments we recruited young Australians, New Zealanders and South Africans living in London. Some of their callers were back home, thousands of miles away, and the others were new acquaintances in England. In these tests, the hit rates were higher with their nearest and dearest far away than with people in Britain they had met only recently, showing that emotional closeness is more important than physical proximity.