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Direct linkDavison, Michael; Baum, William M. – Journal of the Experimental Analysis of Behavior, 2010
Four pigeons were trained in a procedure in which concurrent-schedule food ratios changed unpredictably across seven unsignaled components after 10 food deliveries. Additional green-key stimulus presentations also occurred on the two alternatives, sometimes in the same ratio as the component food ratio, and sometimes in the inverse ratio. In eight…
Descriptors: Stimuli, Auditory Perception, Animals, Responses
