Your eyes betray the timing of your decisions

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Your eyes betray the timing of your decisions
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• Increasing numbers of researchers are using brain
  scanning techniques to perform what is commonly
  referred to as mind reading. Their efforts have
  had limited success, however, and our decisions
  are still private mental events which are
  inaccessible to others. Until now, it was unclear
  whether there are outwardly visible physiological
  responses associated with the decision-making
  process. But a new study now shows that dilation
  of the pupils can predict when a decision has
  been made before an individual voluntarily
  reports making the decision.

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• The researchers used an infrared eye-tracking
  device to measure the diameter of the
  participants left pupils up to 2,000 times per
  second while they performed the tasks. They found
  that pupil dilation was tightly coupled with the
  time at which the decisions were made, and
  betrayed the participants decisions before they
  were openly revealed.

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• In the first experiment, maximum pupil dilation
  was observed during the 2-second interval in
  which the button was pressed. In the second,
  where there was a delay between the choice and
  the participants report of which number they had
  chosen, their pupils were maximally dilated
  during the interval at which they chose the
  digit. During task three, maximum dilation was
  again observed during the time at which the
  participants chose the underlined number.

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• Thus, pupil dilation, which is an external
  physiological response visible to the naked eye,
  can provide clues about strategic decision making
  processes, and can be used to predict decisions
  before they are revealed by the individual.
  Interestingly, poker players may have known this
  all along it may be the reason that many of
  them like to wear sunglasses while playing.

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• The findings have another important implication,
  for patients who are in a persistent vegetative
  state or are suffering from locked-in syndrome,
  and are apparently oblivious to the outside
  world. The pupil dilation response could possibly
  be used along with functional neuroimaging to
  help clinicians assess mental function in such
  patients.
• Source http//www.eyepokeranalyzer.com/news/1191.
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