Subjective optimality in finite sequential decision-making
Fig 5
Pupillometry responses reflect subsequent choices and decision values.
(A) Pupil size change from the stimuli onset was measured, separately for the accepted (green) and rejected (red) opportunities. Paired comparison between the cases revealed significant pupil dilation for the accepted stimuli at the early stage after the onset, and again at the later time. (B) To examine whether or not pupil size reflected stimuli value, the peak pupil size between the stimuli onset and 1500 msec after the onset was depicted as a function of the signed distance between stimuli value and the corresponding decision threshold. (C) Individuals who had higher value sensitivity in their estimated parameter (median split; red) showed more pronounced pupillometric responses reflecting the value information. Shades represent s.e.m.