Pupil Size as Related to Interest Value of Visual Stimuli

  title={Pupil Size as Related to Interest Value of Visual Stimuli},
  author={Eckhard H. Hess and James M. Polt},
  pages={349 - 350}
Increases in the size of the pupil of the eye have been found to accompany the viewing of emotionally toned or interesting visual stimuli. A technique for recording such changes has been developed, and preliminary results with cats and human beings are reported with attention being given to differences between the sexes in response to particular types of material. 

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Part of this work was carried out at the Perception Research Laboratory of McCann-Erickson
    The Percepto-Scope is manufactured by Perceptual Development Laboratories