What Can Cause Your Pupil to Dilate?

What Can Cause Your Pupil to Dilate?

Posted by Blaise Elion on Nov 13, 2018 1:39 am

The processing of emotional signals usually causes an increase in pupil size, and this effect has been largely attributed to autonomic arousal prompted by the stimuli. Additionally, changes in pupil size were associated with decision making during non-emotional perceptual tasks. In addition, pupil response revealed properties of the decisions, such as the perceived emotional valence and the confidence in the assessment.

Previous studies report that emotionally arousing stimuli, both auditory and visual, trigger bigger increases in pupil size than emotionally neutral stimuli. Apart from emotional stimuli, cognitively effortful tasks have long been known to influence pupil size. 

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