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Disentangling the effects of attentional weighting and associative mediation in perceptual learning reveals no evidence for associative mediation (2019)
Journal Article
George, D. N., & Oltean, B. P. (in press). Disentangling the effects of attentional weighting and associative mediation in perceptual learning reveals no evidence for associative mediation. Journal of Experimental Psychology: Learning, Memory, and Cognition, https://doi.org/10.1037/xlm0000773

Learning to categorize perceptually similar stimuli can result in people becoming more sensitive to differences along perceptual dimensions that are relevant to category membership and/or less sensitive to equivalent differences along irrelevant perc... Read More

Effects of short-term temperature change in the innocuous range on histaminergic and non-histaminergic acute itch (2018)
Journal Article
Lewis, Z., George, D. N., Cowdell, F., & Holle, H. (2019). Effects of short-term temperature change in the innocuous range on histaminergic and non-histaminergic acute itch. Acta dermato-venereologica, 99(2), 188-195. https://doi.org/10.2340/00015555-3077

While temperatures in the noxious range are well-known to inhibit acute itch, the impact of temperature in the innocuous temperature range is less well understood. We investigated the effect of alternating short-term temperature changes in the innocu... Read More

Stimulus similarity affects patterning discrimination learning. (2018)
Journal Article
George, D. N. (2018). Stimulus similarity affects patterning discrimination learning. Journal of Experimental Psychology: Animal Learning and Cognition, 44(2), 128-148. https://doi.org/10.1037/xan0000164

© 2018 American Psychological Association. In four experiments, participants' performance on a variety of nonlinear patterning discriminations was assessed using a predictive learning task and visual patterns. Between groups, the similarity of the st... Read More

Contextual modulation of attention in human category learning (2012)
Journal Article
George, D. N., & Kruschke, J. K. (2012). Contextual modulation of attention in human category learning. Learning and Behavior, 40(4), 530-541. https://doi.org/10.3758/s13420-012-0072-8

In a category-learning experiment, we assessed whether participants were able to selectively attend to different components of a compound stimulus in two distinct contexts. The participants were presented with stimulus compounds for which they had to... Read More

Dissociation of prefrontal cortex and nucleus accumbens dopaminergic systems in conditional learning in rats (2011)
Journal Article
George, D. N., Jenkins, T. A., & Killcross, S. (2011). Dissociation of prefrontal cortex and nucleus accumbens dopaminergic systems in conditional learning in rats. Behavioural Brain Research, 225(1), 47-55. https://doi.org/10.1016/j.bbr.2011.06.028

There is converging evidence that the prefrontal and mesolimbic dopaminergic (DAergic) systems are involved in the performance of a variety of tasks that require the use of contextual, or task-setting, information to select an appropriate response fr... Read More

Impaired conditional task performance in a high schizotypy population: Relation to cognitive deficits (2011)
Journal Article
Haddon, J. E., George, D. N., Grayson, L., McGowan, C., Honey, R. C., & Killcross, S. (2011). Impaired conditional task performance in a high schizotypy population: Relation to cognitive deficits. Quarterly Journal of Experimental Psychology, 64(1), 1-9. https://doi.org/10.1080/17470218.2010.529579

Cognitive impairments in schizophrenia have been characterized as reflecting a core deficit in the maintenance or use of task-setting cues to mediate appropriate ongoing behaviour. This analysis suggests that cognitive deficits in schizophrenia will... Read More

Contextual control of biconditional task performance: evidence for cue and response competition in rats (2008)
Journal Article
Haddon, J. . E., George, D. . N., & Killcross, S. (2008). Contextual control of biconditional task performance: evidence for cue and response competition in rats. Quarterly Journal of Experimental Psychology, 61(9), 1307-1320. https://doi.org/10.1080/17470210701515819

A novel paradigm is presented that was designed to mimic aspects of cue and response competition seen in humans in conflict procedures such as the Stroop task. Rats were trained simultaneously on two biconditional discrimination tasks, one auditory a... Read More

The nature of discrimination learning in pigeons (2008)
Journal Article
Pearce, J. M., Esber, G. R., George, D. N., & Haselgrove, M. (2008). The nature of discrimination learning in pigeons. Learning and Behavior, 36(3), 188-199. https://doi.org/10.3758/lb.36.3.188

The results from five experiments are considered in relation to two of Spence's (1937, 1938) proposals concerning discrimination learning. In Experiments 1 and 2, we investigated whether his ideas about the interaction between excitatory and inhibito... Read More

Optional-shift behaviour in rats: a novel procedure for assessing attentional processes in discrimination learning (2007)
Journal Article
Duffaud, A. M., Killcross, S., & George, D. N. (2007). Optional-shift behaviour in rats: a novel procedure for assessing attentional processes in discrimination learning. Quarterly Journal of Experimental Psychology, 60(4), 534-542. https://doi.org/10.1080/17470210601154487

A novel, optional-shift procedure was used to assess changes in the attention paid to stimuli that occur over the course of discrimination learning. In Phase 1, rats were trained on a conditional instrumental discrimination using audiovisual stimulus... Read More

The discrimination of structure: III. Representation of spatial relationships. (2005)
Journal Article
Haselgrove, M., George, D. N., & Pearce, J. M. (2005). The discrimination of structure: III. Representation of spatial relationships. Journal of Experimental Psychology: Animal Behavior Processes, 31(4), 433-448. https://doi.org/10.1037/0097-7403.31.4.433

Pigeons received a discrimination in which the spatial relationship between 2 adjacent rectangles filled with different colors signaled the trial outcome. Test trials then involved the same rectangles separated horizontally by a gap. The tests in Exp... Read More

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

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

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