Psychonomic Science

, Volume 3, Issue 1–12, pp 9–10 | Cite as

Depth perception in the dark-reared rat as a function of time in the dark

  • Richard D. Walk
  • Samuel TrychinJr.
  • Bernard Z. Karmel
Animal Behavior


Dark-reared hooded rats were tested for depth perception on the visual cliff. Ss were given an equal density condition to equate retinal angle presented during testing. Ss were kept in the dark from birth and tested after 40–170 days without visual stimulation. Dark-reared Ss 90 days of age, and perhaps to 125 days of age, discriminated depth. No group kept in the dark 140 days of longer discriminated depth.


Visual Stimulation Depth Perception Texture Element Motion Parallax Visual Depth 
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Copyright information

© Psychonomic Press 1965

Authors and Affiliations

  • Richard D. Walk
    • 1
  • Samuel TrychinJr.
    • 1
  • Bernard Z. Karmel
    • 1
  1. 1.George Washington UniversityUSA

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