Abstract
Young habituated chickens exposed to artificial eyes suspended overhead remained immobile in response to manual restraint appreciably longer than did controls and were more susceptible to immobility. The results were discussed in relation to a defensive-distance dimension and in terms of the notion that tonic immobility may have evolved in response to predation.
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We wish to thank Martin S. Waite for photographic assistance.
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Gallup, G.G., Nash, R.F. & Ellison, A.L. Tonic immobility as a reaction to predation: Artificial eyes as a fear stimulus for chickens. Psychon Sci 23, 79–80 (1971). https://doi.org/10.3758/BF03336016
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DOI: https://doi.org/10.3758/BF03336016