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| Quantitative Look at Quality |
| Monday, May 31, 2010 |
| 10:00 AM–11:20 AM |
| Lone Star Ballroom Salon C (Grand Hyatt) |
| Area: EAB |
| Chair: J. J. Tomash (Swansea University) |
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| Reinforcer Quality Matters: A Test of the Mathematical Principles of Reinforcement With Brushtail Possums (Trichosurus Vulpecula) and Domestic Hens (Gallus Gallus Domesticus) |
| Domain: Experimental Analysis |
| Mizuho Osugi (The University of Waikato), Julie-Anne Bruce (University of Waikato), LEWIS A. BIZO (The University of Waikato), Therese Mary Foster (University of Waikato) |
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| Abstract: Predictions of Killeen’s (1994) mathematical principles of reinforcement, that was used to model the effects of qualitatively different types of reinforcer on responding supported by a fixed-ratio schedule of reinforcement, were tested with brushtail possums (Trichosurus vulpecula) and domestic hens (Gallus gallus domesticus). The animals were tested across ascending series of fixed ratio (FR) schedules in each condition and reinforcer type was manipulated across conditions. Lever presses by the brushtail possums were reinforced with rolled oats, bran-flakes, or a mix of sunflower seeds and barley. Key pecks by hens were reinforced with either puffed wheat or wheat. Response rates were well described by a bitonic function. Response rates tended to increase as FR value increased to a point and then decreased with subsequent increases in FR value. The data are discussed in terms of the ability of the model to describe differences in rates of responding supported by qualitatively different reinforcers. |
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| A Parametric Evaluation of Percentile IRT schedules using Log Survivor Plots |
| Domain: Experimental Analysis |
| WENDY DONLIN-WASHINGTON (University of North Carolina, Wilmington), Mary E. Stallings (Murdoch Center), M. Christopher Newland (Auburn University) |
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| Abstract: Components of response rate were examined for several percentile Inter-response Time (IRT) schedules in rats. Under this schedule, lever presses were reinforced by food on an RI 30s schedule, provided that it also fulfilled a designated IRT |
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| The Effect of Trial Number and UCS Ratio on Classically Conditioned Responses to Deception |
| Domain: Experimental Analysis |
| J. J. TOMASH (University of Wales, Swansea), Phil Reed (University of Wales Swansea) |
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| Abstract: This experiment builds upon previous research (Tomash & Reed, 2009; under review), which demonstrated that deception can be conditioned to produce a strong discriminative skin conductance response (SCR) using a basic classical conditioning procedure. The current studies attempted to build upon this research, and take it one step closer to becoming a practical method of detecting deception, by exploring the effect of different variables on the strength of the discriminated response produced. Specifically, across four groups we tested the effect of number of conditioning trials (60 vs. 100) and ratio of CS+ trials reinforced (50% vs. 100%) on the final response. Results were measured in the discriminative SCR subjects exhibited between truthful and deceptive answers on 20 test trials in which no trials were reinforced. Results are currently being analyzed and will be available for presentation at the 2010 ABAI conference. |
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