By Mike McRae via ScienceAlert
Throughout history, there have been individuals who believe they’ve caught a sense of events yet to come.
True clairvoyance is unsupported by scientific evidence, but a subtle difference in how some people perceive the timing of events could help explain why many remain convinced of their psychic abilities.
A study by researchers from Yale University has provided some insight into why people think they have supernatural foresight, hinting at a physiological basis behind certain delusions.
The weight of evidence makes it fairly clear the human brain is not influenced by future events.
In many cases, proposed psychic abilities are the result of intentional fraud, with charlatans employing the same kinds of tricks mentalist magicians have used for centuries to feign mind reading and fortune telling.
But not all people who claim extraordinary abilities of future-sight are out to make a quick buck or two. Dismissing it as a sign of mental illness also tells us little about how such beliefs develop in otherwise healthy brains.
To gain an understanding of the neurological underpinnings of psychic prediction, the researchers made use of a test that had previously demonstrated a link between the timing of a colour changing shape, and the subject’s judgement of their ability to predict its transformation.
Only this time the researchers also evaluated the volunteers’ beliefs.
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Source: BPS Research Digest
A large proportion of the public – over a quarter according to a Gallup survey in the US – believe that humans have psychic abilities such as telepathy and clairvoyance, even though mainstream science says there is no evidence that these powers exist. It might be tempting for sceptics to put this down to a lack of general intelligence or education on the part of the believers, but in fact past research has failed to support this interpretation.
Now a paper in Memory and Cognition has looked for differences between believers and sceptics in specific mental abilities, rather than in overall intelligence or education. Across three studies – this was one of the most comprehensive investigations of its kind – the researchers at the University of Chicago found that believers in psychic powers had memory abilities equal to the sceptics, but they underperformed on tests of their analytical thinking skills.
Stephen Gray and David Gallo surveyed the psychic beliefs, “need for cognition” (how much people enjoy mental effort) and life satisfaction of over two thousand people online. For example, regarding psychic beliefs, one survey item asked participants whether they agreed or disagreed that “it is possible to gain information about the future before it happens, in ways that do not depend on rational prediction or normal sensory channels”. The strongest psychic believers and sceptics matched for years in education or academic performance (around 50 people in each group, in each of the three studies; aged 18 to 35) were then invited to complete a range of tests of their memory and analytical skills, either online or in person at the psych lab.
Australian survey finds people can reliably detect a change in surroundings, even if they cannot accurately describe it
If you can eerily detect the presence of unseen people or have prescient knowledge of danger, it may be disappointing to learn that scientists have ruled out the existence of a “sixth sense”.
A year-long University of Melbourne study, published in the journal Plos One, found that people could reliably detect a change in their surroundings, even if they could not accurately describe what that change was.
However, the research concluded that this was not due to any kind of supernatural ability, but rather from cues picked up from more conventional senses such as sight.
Researchers presented pairs of photos of a woman to 48 different people. In some cases, the appearance of the woman in one of the pictures would be different – such as a different hairstyle or the presence of glasses.
The pictures were shown to the subjects for 1.5 seconds with a one-second break between them. The people were then asked whether a change had occurred and, if so, to pick the change from a list of nine possibilities.
The results showed that while the subjects could “sense” a change had occurred, they could not verbalise what it was. While this confirmed to some subjects that they possessed a sixth sense, or extrasensory perception, researchers said it showed there was no such ability.
“What people were doing was processing information that they couldn’t verbalise but were picking up on, often subconsciously,” Dr Piers Howe from the Melbourne School of Psychological Sciences told Guardian Australia. “It’s a bit like an abstract painting – it doesn’t depict anything you can label, such as a sea or mountain, but you can still get a lot of information on what’s going on.
“The information was enough to tell them that a change had occurred, because they could tell the picture was more crowded, but not enough to say what that change was. Many believed they had a quasi-magical ability even though we had set them up.”