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Pigeons play the percentages: computation of probability in a bird

Animal Cognition volume 21, pages 575–581 (2018)Cite this article

Abstract

The ability to compute probability, previously shown in nonverbal infants, apes, and monkeys, was examined in three experiments with pigeons. After responding to individually presented keys in an operant chamber that delivered reinforcement with varying probabilities, pigeons chose between these keys on probe trials. Pigeons strongly preferred a 75% reinforced key over a 25% reinforced key, even when the total number of reinforcers obtained on each key was equated. When both keys delivered 50% reinforcement, pigeons showed indifference between them, even though three times more reinforcers were obtained on one key than on the other. It is suggested that computation of probability may be common to many classes of animals and may be driven by the need to forage successfully for nutritional food items, mates, and areas with a low density of predators.

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Funding

Support for this research was provided by a Discovery Grant from the Canadian Natural Sciences and Engineering Research Council to William A. Roberts (R1520A01).

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Authors and Affiliations

  1. Department of Psychology, Western University, London, ON, N6A 5C2, Canada

    William A. Roberts, Hayden MacDonald & Ka Ho Lo

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  1. William A. Roberts
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  2. Hayden MacDonald
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  3. Ka Ho Lo
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Correspondence to William A. Roberts.

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Roberts, W.A., MacDonald, H. & Lo, K.H. Pigeons play the percentages: computation of probability in a bird. Anim Cogn 21, 575–581 (2018). https://doi.org/10.1007/s10071-018-1192-0

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  • DOI: https://doi.org/10.1007/s10071-018-1192-0

Keywords

  • Probability
  • Reinforcement
  • Nonreinforcement
  • Choice
  • Pigeons