catania’s concept of the operant revisited · 2010. 9. 8. · 8 september 2010 catania’s...
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8 September 2010
Catania’s concept of the operant revisited
Garry Oliver, James McEwan
Learning Behaviour & Welfare Research Unit
School of Psychology, University of Waikato
New Zealand
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Acknowledgements
• We would like to thank:• Bill Temple
• Andrew Malcolm
• Jennifer Chandler
• The students at #3
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Variations in response topographies
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Figure 1: Hypothetical presentation of Skinner's operant. Distributions of response probabilities ‘A’, ‘B’, and ‘C’ are known to continue outside the range of ‘X’ and ‘Y’, but are nonetheless discarded.
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Variations in response topographies
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Figure 2: Hypothetical representation response and stimuli probabilities shown as a function of an arbitrary response parameter.
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Variations in response topographies
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Figure 3: Hypothetical response distributions where B, C, and D, shows a narrowing and shift of the response distribution toward X, the lower requirement of contingent reinforcement indicative of the law of least effort.
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Auto shaping• Why?
• Quick to shape?
• Requires no intervention
• Prevents experimenter bias
• How?1968, Brown and Jenkins
• Key light was presented for 8-sec
• If key pecked during 8-sec then 4-sec access to food
• Else after 8-sec 4-sec access to food
• Mean interval of 60-sec between trials
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Method Auto shaping
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Food delivery
Infrared sensors
Active region of screen
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Method Con 1 CRF
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Method Con 2 CRF
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