Emotional Response Can Alter Pupil Size

photo credit: Photos by Lina
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You’ve probably heard of body language as a way of communicating true feelings. But did you know there’s also such a thing as eye language?
Researchers have known for years that pupil size is a major clue in determining a person’s emotional response, and can sometimes contradict what’s actually being said. If you want to know safe how your date honestly feels about you, look into his or her eyes. A larger pupil indicates a positive response, whereas a constricted pupil indicates a less than favorable reaction. Similar eye responses can be seen in reactions to food or other stimuli.
In the 1960′s and 1970′s, German immigrant and psychologist Eckhard Hess first researched the importance of the eye’s pupil size in response to emotional stimuli through eye measurements known as pupillometrics or pupillometry.
vision.about.com, 2006
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