Pigeon's choice depends primarily on the value of the signal for the outcome rather than its frequency or contrast.
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DOI: 10.1037/xan0000316
Abstract: Pigeons typically prefer a 20% probability of signaled reinforcement over a 50% probability of unsignaled reinforcement. There is even evidence that they prefer 50% signaled reinforcement over 100% reinforcement. It has been suggested that this… read more here.
Keywords: reinforcement time; reinforcement; contrast; choice ... See more keywords