n the video, the man stands at the end of a darkened corridor; his face has been blurred but his posture – shoulders stooped, head tilted in concern, hands clenched into anxious fists – betrays some uncertainty. He briefly speaks to a man standing just out of shot. Then, as if squaring himself to face a challenge, he turns to the camera and begins to walk.
We see that the corridor is strewn with items, creating a makeshift obstacle course. Haltingly, he shuffles past a bin, walks forward, then steps around a camera tripod. His steps quicken; left at a stack of printer paper, right at a plastic in-tray. The camera zooms in on his feet as he passes around the final obstacle, a plain white cardboard box. We cut away before we see the reactions of the people around him, but it seems reasonable to assume that they are amazed. The clip lasts 38 seconds – that is the length of time it has taken the man to navigate the obstacle course without a single collision.
He has done all of this with no help or guidance, despite being completely blind.
“It’s quite amazing,” says Joel Pearson, Professor of Cognitive Neuroscience at the University of New South Wales in Australia. “It’s a phenomenon called ‘blindsight’.” People with blindsight often have functioning eyes, but damage to their brains’ visual cortex means that the raw data isn’t interpreted consciously in the brain, leaving them partially or completely blind. “So you get this situation where the information is going in, but the person can’t actually see.” And yet, doctors have found that given some encouragement, a person with blindsight, like the man in the video, may be able to navigate obstacles just as well as a seeing person. “Often they’re saying: ‘I have absolutely no idea how I'm doing this,’” says Pearson. “They’re using the information in a different way to how they might if they were seeing consciously. They’re making decisions based on feeling – the information is in their brain and they feel it there, then they act on it.” This, he argues, is how intuition works. “It’s the act of taking unconscious information and utilising it to make productive, useful decisions.”
Dissatisfied with the previous research on the subject, which for the most part had focused on self-reported assessments (for instance, chess players describing how they felt while making certain moves – whether they were moving strategically or intuitively), Pearson and his team designed an experiment which would prove that intuition exists and could be trained. The experiment used what Pearson calls “emotional inception”:“emotive images were flashed into the eyes of participants in a way that they weren’t consciously aware of; from neuroimaging we could see that the brain was registering the images, but the participants couldn’t consciously see them”. This was used to add unconscious emotional weighting to a decision-making task: in this case, participants were asked to judge the direction of travel, left or right, of a jumble of black dots on a screen. One direction was associated with the good images, the other with the bad images. Linking a direction with an emotive image meant that participants quickly began to make more accurate predictions, even when it was harder to spot which way the dots were moving. Their brains were logging the subliminal signals, using these to make better inferences and better decisions. For the first time in human history, a scientific experiment had captured intuition in action.