Date of Award

4-6-2026

Document Type

Thesis

Department

Behavioral Sciences

First Advisor

Karl G. Bailey

Abstract

Can the luminance level of mentally generated images affect pupil dilation? The purpose of this study is to evaluate whether mental images in the brain can produce a physiological reaction in pupil dilations specifically. The hypothesis is that if a participant mentally generates images of differing luminance levels, then the pupils will either dilate or constrict accordingly. While this study achieved no statistical significance, it should be noted that further research and advancement of the protocol used in this study can potentially be used for non-verbal medical patients as a new means of communication that is easily accessible.

Subject Area

Brightness perception; Nonverbal communication; Pupil dilation; Pullometry; Pupil (Eye)

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