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They also betray mental and emotional commotion within. In fact, pupil dilation correlates with arousal so consistently that researchers use pupil size, or pupillometry, to investigate a wide range of ...

In the laboratory, all test subjects were then also exposed to artificial light of different wavelengths (red, green, blue and white) and their pupil dilation was measured for comparability and ...

OP-ED. At a time when hoaxes flourish, psychology researcher Sylvie Chokron explains in a column how to spot mythomaniacs ...

The peripheral drift illusion causes us to perceive motion in a still image. A new study shows that the mechanism of this illusion relies on changes in pupil size.

The science of pupillometry takes a common intuition — that you can tell a lot about someone when you look them in the eye — and makes it concrete, measurable, and extraordinarily useful.

By comparing the time course of each pupil dilation to the time it took participants to indicate that the motion had stopped, the researchers found astonishingly high correlations. Across the ...

Medically reviewed by Christine L. Larsen, MD The pupil is the opening located in the center of the iris of the eye. It ...

Dilation and constriction of the pupils reflect not only changes in light intensity but also ongoing mental activity. The response is a measure of interest, emotion, thought processes and attitudes ...