Abstract
Starting at 1 week of age, domestic chicks were shaped to work on a concurrent FR-FR (houselight-food) schedule of reinforcement. When a discrimination was superimposed upon the concurrent schedule, patterns of responding indicated a chaining effect. The houselight appeared to be necessary for eating behavior and did not have much social reinforcing properties of its own. This was supported by a severe decrease in responding on the houselight key when the food key was unavailable. Activating a low-intensity lamp near the feeder also resulted in much diminished responding on the houselight key.
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References
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Sparser, S.B. Schedule control of concurrent fixed-ratio responding and discrimination acquisition in chickens. Psychon Sci 18, 135–136 (1970). https://doi.org/10.3758/BF03332339
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DOI: https://doi.org/10.3758/BF03332339