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A new study has revealed two relatively simple methods that can be used to trick a mirror imaging device, which utilizes a functional MRI (fMRI) machine instead of a traditional polygraph system. Some of the techniques used to evade normal detection methods, which can be found in the body of the brain, can be found in the brain.
Compared to polygraphs, brain imaging is considered to be more or less reliable in the participant's brain. The idea is that the person is concentrating on their recognition of whatever it is they are lying about, the fMRI will reveal greater amounts of blood in their brain.
Researchers with the University of Plymouth identified two countermeasures that reduced the accuracy of the brain by 20-percent. The first method involved the participant badociating 'meaningful memories' with the control item, which was an item other than the one the participant was attempting to conceal.
The brain of someone who, for example, stole a particular item and is shown multiple items that include the stolen object, may give away the person's knowledge of the stolen item when they view it. Associated with their face to the world, helping them face the problem.
In addition, the researchers have shown that they have reduced their accuracy by focusing on their object of appearance, such as its color or shape, to reduce their brain response to the item. The fMRI system struggled to find differences in brain activity when these methods were used, causing accuracy to drop by around 20-percent.
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