Participants, who were asked to pick the odd one out on a screen covered in over 650 identical symbols, including one rotated version of the same symbol, actually performed better when they were given no time at all to linger on the symbols and so were forced to rely entirely on their subconscious.
Dr Li Zhaoping, of the UCL Department of Psychology, said: "This finding seems counter-intuitive. You would expect people to make more accurate decisions when given the time to look properly. Instead they performed better when given almost no time to think. The conscious or top-level function of the brain, when active, vetoes our initial subconscious decision ?even when it is correct ?leaving us unaware or distrustful of our instincts and at an immediate disadvantage. Falling back on our inbuilt, involuntary subconscious processes for certain tasks is actually more effective than using our higher-level cognitive functions."
The study shows an instance when our rational mind is more likely to perform worse than our subconscious ?but the conscious mind still tends to veto the subconscious.
Ten participants were asked to locate the only back to front version of a repeated symbol on screen and were given between zero and 1.5 seconds from the moment their eyes had landed on the odd one out to scrutinize the image. Participants had to decide whether the odd one out was on the left or the right-hand side of the screen. The researchers found that participants scored better if they were given no scrutinizing time at all.
With only a tiny fraction of a second for scrutinizing the target,
Source:University College London