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Imitative learning of stimulus-response and response-outcome associations in pigeons (2005)
Journal Article
Saggerson, A. L., George, D. N., & Honey, R. C. (2005). Imitative learning of stimulus-response and response-outcome associations in pigeons. Journal of Experimental Psychology: Animal Behavior Processes, 31(3), 289-300. https://doi.org/10.1037/0097-7403.31.3.289

A novel automated procedure was used to study imitative learning in pigeons. In Experiments 1 and 2, observer pigeons witnessed a demonstrator pigeon successfully performing an instrumental discrimination in which different discriminative stimuli ind... Read More about Imitative learning of stimulus-response and response-outcome associations in pigeons.

Representational blending in human conditional learning: Implications for associative theory (2003)
Journal Article
Hodder, K. I., George, D. N., Killcross, A. S., & Honey, R. C. (2003). Representational blending in human conditional learning: Implications for associative theory. Quarterly Journal of Experimental Psychology Series B Comparative and Physiological Psychology, 56(2b), 223-238. https://doi.org/10.1080/02724990244000269

In two experiments, participants were presented with pictures of different foods (A, B, C, D, X, Y) and learned which combinations resulted in an allergic reaction in a fictitious patient, Mr X. In Problem 1, when A or B (but not C or D) was combined... Read More about Representational blending in human conditional learning: Implications for associative theory.

Discrimination of structure: II. Feature binding. (2003)
Journal Article
Pearce, J. M., & George, D. N. (2003). Discrimination of structure: II. Feature binding. Journal of Experimental Psychology: Animal Behavior Processes, 29(2), 107-117. https://doi.org/10.1037/0097-7403.29.2.107

In 3 experiments, pigeons acquired a discrimination between patterns comprising the same features. Thus vertical green bars beside horizontal red bars might have signaled food, and horizontal green bars beside vertical red bars might have signaled no... Read More about Discrimination of structure: II. Feature binding..

Virtual search asymmetry in pigeons. (2003)
Journal Article
Pearce, J. M., & George, D. N. (2003). Virtual search asymmetry in pigeons. Journal of Experimental Psychology: Animal Behavior Processes, 29(2), 118-129. https://doi.org/10.1037/0097-7403.29.2.118

Pigeons received an odd-item search task that involved an array of 12 patterns containing 11 similar distractors and a single target. Pecks to the target resulted in the delivery of food. Accuracy was greater on trials when a distinctive feature was... Read More about Virtual search asymmetry in pigeons..

Acquisition of superexcitatory properties by an irrelevant background stimulus (2002)
Journal Article
Williams, D. A., Mehta, R., Poworoznyk, T. M., Orihel, J. S., George, D. N., & Pearce, J. M. (2002). Acquisition of superexcitatory properties by an irrelevant background stimulus. Journal of Experimental Psychology: Animal Behavior Processes, 28(3), (284-297). doi:10.1037//0097-7403.28.3.284. ISSN 0097-7403

Six appetitive conditioning experiments with rats demonstrated that an irrelevant X accompanying a negative patterning discrimination (XA+, XB+, XAB-) acquires extraordinarily high levels of conditioned excitation. Responding to X was similar to that... Read More about Acquisition of superexcitatory properties by an irrelevant background stimulus.

The effects of using stimuli from three different dimensions on autoshaping with a complex negative patterning discrimination (2002)
Journal Article
Pearce, J. M., & George, D. N. (2002). The effects of using stimuli from three different dimensions on autoshaping with a complex negative patterning discrimination. Quarterly Journal of Experimental Psychology Series B Comparative and Physiological Psychology, 55(4b), 349-364. https://doi.org/10.1080/02724990244000061

In two experiments pigeons received a complex negative patterning discrimination, using autoshaping, in which food was made available after three stimuli if they were presented alone (A, B, C), or in pairs (AB, AC, BC), but not when they were all pre... Read More about The effects of using stimuli from three different dimensions on autoshaping with a complex negative patterning discrimination.

Summation in autoshaping is affected by the similarity of the visual stimuli to the stimulation they replace. (2002)
Journal Article
Pearce, J. M., Redhead, E. S., & George, D. N. (2002). Summation in autoshaping is affected by the similarity of the visual stimuli to the stimulation they replace. Journal of Experimental Psychology: Animal Behavior Processes, 28(2), 175-189. https://doi.org/10.1037/0097-7403.28.2.175

Pigeons received autoshaping with 2 stimuli, A and B, presented in adjacent regions on a television screen. Conditioning with each stimulus was therefore accompanied by stimulation that was displaced from the screen whenever the other stimulus was pr... Read More about Summation in autoshaping is affected by the similarity of the visual stimuli to the stimulation they replace..

Summation: further assessment of a configural theory (2002)
Journal Article
Pearce, J. M., George, D. N., & Aydin, A. (2002). Summation: further assessment of a configural theory. Quarterly Journal of Experimental Psychology Series B Comparative and Physiological Psychology, 55(1b), 61-73. https://doi.org/10.1080/02724990143000171

Rats received Pavlovian conditioning in which food was signalled by a visual stimulus, A+, an auditory stimulus, B+, and a compound composed of different visual and auditory stimuli, CD+. Test trials were then given with the compound AB. Experiments... Read More about Summation: further assessment of a configural theory.

Discrimination of structure: I. Implications for connectionist theories of discrimination learning. (2001)
Journal Article
George, D. N., Ward-Robinson, J., & Pearce, J. M. (2001). Discrimination of structure: I. Implications for connectionist theories of discrimination learning. Journal of Experimental Psychology: Animal Behavior Processes, 27(3), 206-218. https://doi.org/10.1037/0097-7403.27.3.206

In each of 4 experiments animals were given a structural discrimination task that involved visual patterns composed of identical features, but the spatial relations among the features were different for reinforced and nonreinforced trials. In Experim... Read More about Discrimination of structure: I. Implications for connectionist theories of discrimination learning..