Pupil dilation betrays the timing of decisions

As a junkie for anything on decision-making I was elated to find this research that basically says that pupils dilate the second a person makes a decision. NICE. As many of you know, pupils normally dilate when a person sees an object of interest, in some emotional states, e.g. fear, when a person experiences pain, in dark rooms to let more light in, as a result of the use of some substances, etc. So here is that research.

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