Abstract
An 8 × 10 in. black-and-white photograph of an adult male stranger was presented to each of four randomly assigned groups of male college students. These photographs were identical except that in two of them the stranger had light-colored irises and, in the other two, dark-colored ones. Also, in the light-iris set, one print had large pupils and the other small. Similarly, in the dark-colored set, one print had large pupils and the other small. A total of six sets of four prints each were presented and the students were required to express either positive or negative affect for the photographic subjects. The results revealed a significant relationship between iris color and expressed affect. A nonsignificant effect was obtained for pupil size and for the iris color and pupil size interaction.
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Jones, Q.R., Moyel, I.S. The influence of iris color and pupil size on expressed affect. Psychon Sci 22, 126–127 (1971). https://doi.org/10.3758/BF03332529
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DOI: https://doi.org/10.3758/BF03332529