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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
Oltean, B. P., 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 about Disentangling the effects of attentional weighting and associative mediation in perceptual learning reveals no evidence for associative mediation..

A computational implementation of a Hebbian learning network and its application to configural forms of acquired equivalence (2019)
Journal Article
Robinson, J., George, D. N., & Heinke, D. (2019). A computational implementation of a Hebbian learning network and its application to configural forms of acquired equivalence. Journal of experimental psychology. Animal learning and cognition, 45(3), 356-371. https://doi.org/10.1037/xan0000203

We describe and report the results of computer simulations of the three-layer Hebbian network informally described by Honey, Close, and Lin (2010): A general account of discrimination that has been shaped by data from configural acquired equivalence... Read More about A computational implementation of a Hebbian learning network and its application to configural forms of acquired equivalence.

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 about Effects of short-term temperature change in the innocuous range on histaminergic and non-histaminergic acute itch.

More evidence that less is better: Sub-optimal choice in dogs (2018)
Journal Article
Chase, R. J., & George, D. N. (2018). More evidence that less is better: Sub-optimal choice in dogs. Learning and Behavior, 46(4), 462-471. https://doi.org/10.3758/s13420-018-0326-1

The less-is-better effect is a preference for the lesser of two alternatives sometimes observed when they are evaluated separately. For example, a dinner service of 24 intact pieces might be judged to be more valuable than a 40-piece dinner service c... Read More about More evidence that less is better: Sub-optimal choice in dogs.

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 about Stimulus similarity affects patterning discrimination learning..

Placebo Analgesia From a Rubber Hand (2017)
Journal Article
Coleshill, M. J., George, D. N., & Mazzoni, G. (2017). Placebo Analgesia From a Rubber Hand. Journal of Pain, 18(9), 1067-1077. https://doi.org/10.1016/j.jpain.2017.04.004

© 2017 American Pain Society Placebo analgesia, reductions in pain after administration of an inert treatment, is a well documented phenomenon. We report, to our knowledge, the first demonstration that placebo analgesia can be experienced when a sham... Read More about Placebo Analgesia From a Rubber Hand.

Attention and associative learning in humans: an integrative review (2016)
Journal Article
Le Pelley, M. E., Mitchell, C. J., Beesley, T., George, D. N., & Wills, A. J. (2016). Attention and associative learning in humans: an integrative review. Psychological Bulletin, 142(10), 1111-1140. https://doi.org/10.1037/bul0000064

This article presents a comprehensive survey of research concerning interactions between associative learning and attention in humans. Four main findings are described. First, attention is biased toward stimuli that predict their consequences reliabl... Read More about Attention and associative learning in humans: an integrative review.

Pavlovian-to-instrumental transfer: Paradoxical effects of the pavlovian relationship explained (2013)
Journal Article
Cohen-Hatton, S. R., Haddon, J. E., George, D. N., & Honey, R. C. (2013). Pavlovian-to-instrumental transfer: Paradoxical effects of the pavlovian relationship explained. Journal of Experimental Psychology: Animal Behavior Processes, 39(1), 14-23. https://doi.org/10.1037/a0030594

Four experiments with rats examined the origin of outcome-selective Pavlovian-to-instrumental transfer (PIT). Experiment 1 used a standard procedure, where outcomes were embedded within extended conditioned stimuli (CSs), to demonstrate the basic eff... Read More about Pavlovian-to-instrumental transfer: Paradoxical effects of the pavlovian relationship explained.

A configural theory of attention and associative learning (2012)
Journal Article
George, D. N., & Pearce, J. M. (2012). A configural theory of attention and associative learning. Learning and Behavior, 40(3), 241-254. https://doi.org/10.3758/s13420-012-0078-2

A formal account of the relationship between attention and associative learning is presented within the framework of a configural theory of discrimination learning. The account is based on a connectionist network in which the entire pattern of stimul... Read More about A configural theory of attention and associative learning.

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 about Contextual modulation of attention in human category learning.

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 about Dissociation of prefrontal cortex and nucleus accumbens dopaminergic systems in conditional learning in rats.

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 about Impaired conditional task performance in a high schizotypy population: Relation to cognitive deficits.

Lesions to the ventral, but not the dorsal, medial prefrontal cortex enhance latent inhibition (2010)
Journal Article
George, D. N., Duffaud, A. M., Pothuizen, H. H., Haddon, J. E., & Killcross, S. (2010). Lesions to the ventral, but not the dorsal, medial prefrontal cortex enhance latent inhibition. The European journal of neuroscience, 31(8), 1474-1482. https://doi.org/10.1111/j.1460-9568.2010.07178.x

The acquisition of a conditioned response to a stimulus when it is paired with a reinforcer is retarded if the stimulus has previously been repeatedly pre-exposed in the absence of the reinforcer. This effect, called latent inhibition, has previously... Read More about Lesions to the ventral, but not the dorsal, medial prefrontal cortex enhance latent inhibition.

Straw-men and selective citation are needed to argue that associative-link formation makes no contribution to human learning (2009)
Journal Article
Dwyer, D. M., Le Pelley, M. E., George, D. N., Haselgrove, M., & Honey, R. C. (2009). Straw-men and selective citation are needed to argue that associative-link formation makes no contribution to human learning. Behavioral and Brain Sciences, 32(2), 206. https://doi.org/10.1017/s0140525x09000946

Mitchell et al. contend that there is no need to posit a contribution based on the formation of associative links to human learning. In order to sustain this argument, they have ignored evidence which is difficult to explain with propositional accoun... Read More about Straw-men and selective citation are needed to argue that associative-link formation makes no contribution to human learning.

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 about Contextual control of biconditional task performance: evidence for cue and response competition in rats.

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 about The nature of discrimination learning in pigeons.

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 about Optional-shift behaviour in rats: a novel procedure for assessing attentional processes in discrimination learning.

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 about The discrimination of structure: III. Representation of spatial relationships..

The influence of hippocampal lesions on the discrimination of structure and on spatial memory in pigeons (Columba livia). (2005)
Journal Article
Pearce, J. M., George, D. N., Haselgrove, M., Erichsen, J. T., & Good, M. A. (2005). The influence of hippocampal lesions on the discrimination of structure and on spatial memory in pigeons (Columba livia). Behavioral Neuroscience, 119(5), 1316-1330. https://doi.org/10.1037/0735-7044.119.5.1316

Pigeons (Columba livia) were trained with a spatial structural discrimination, which was based on the spatial relationship among the components of a pattern, and a feature-binding structural discrimination, which was based on how different visual fea... Read More about The influence of hippocampal lesions on the discrimination of structure and on spatial memory in pigeons (Columba livia)..