“Our brains are designed to stop us paying too much attention. This is well demonstrated by the optical illusion called Troxler fading (named after the nineteenth-century Swiss physician who discovered the effect). If presented with a steady image in the area of our peripheral vision, we actually stop seeing it after a while. This phenomenon — the general neuroscientific term is habituation — probably points to an efficient way in which the brain operates. Neurons stop firing once they have sufficient information about an unchanging stimulus. But this does not mean that habituating is always our friend.”
Intriguing new technology seeks to use eye movement to replace polygraphs for lie detection.
“The widely accepted assumption underlying all of this is that deception is cognitively more demanding than telling the truth. Converus believes that emotional arousal manifests itself in telltale eye motions and behaviors when a person lies. “