Pigeons play the percentages: computation of probability in a bird

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 key...

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Bibliographic Details
Published in:Animal cognition 2018-07, Vol.21 (4), p.575-581
Main Authors: Roberts, William A., MacDonald, Hayden, Lo, Ka Ho
Format: Article
Language:English
Subjects:
Apes
Behavioral Sciences
Biomedical and Life Sciences
Birds
Columbiformes
Computation
Infants
Life Sciences
Monkeys
Operant conditioning
Original Paper
Pigeons
Predators
Probability
Psychology Research
Reinforcement
Zoology
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Summary: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.
ISSN:1435-9448
1435-9456
DOI:10.1007/s10071-018-1192-0