Studies on the visual acuity of sheep using shape discrimination learning

  title={Studies on the visual acuity of sheep using shape discrimination learning},
  author={Toshio Tanaka and Akira Hashimoto and Hajime Tanida and Tadashi Yoshimoto},
  journal={Journal of Ethology},
Two experiments were conducted to determine the visual acuity of sheep. Three ewes were trained to discriminate between a Landolt ring and an ordinary ring of equal size associated with feed. The left and right positions of the 2 targets were shifted according to the Gellermann series. After the ewes were fully trained, their visual acuity was determined by changing the size of the rings or the distance from the target. The ewes were subjected daily to 1 or 2 sessions which consisted of 30… CONTINUE READING

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