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A computational implementation of a Hebbian learning network and its application to configural forms of acquired equivalence (2019)
Journal Article
Robinson, J., George, D., & Heinke, D. (in press). 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, 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 equivalenc... 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. doi: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

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. doi: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

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. doi: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

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). doi:10.1016/j.jpain.2017.04.004. ISSN 1526-5900

© 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

Learning: a very short introduction (2017)
Journal Article
George, D. (2017). Learning: a very short introduction. Quarterly Journal of Experimental Psychology, 70(2), 346-347. doi:10.1080/17470218.2016.1220606

A review of Haselgrove, Mark (2016) Learning: A short introduction. Oxford University Press.

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. doi: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

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). doi:10.1037/a0030594. ISSN 0097-7403

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

A configural theory of attention and associative learning (2012)
Journal Article
Pearce, J. M., & George, D. N. (2012). A configural theory of attention and associative learning. Learning and Behavior, 40(3), (241-254). doi:10.3758/s13420-012-0078-2. ISSN 1543-4494

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

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). doi:10.3758/s13420-012-0072-8. ISSN 1543-4494

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). doi:10.1016/j.bbr.2011.06.028. ISSN 1872-7549

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). doi:10.1080/17470218.2010.529579. ISSN 1747-0218

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

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

Straw-men and selective citation are needed to argue that associative-link formation makes no contribution to human learning (2009)
Journal Article
Honey, R. C., Haselgrove, M., George, D. N., Le Pelley, M. E., & Dwyer, D. M. (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. doi: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

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. doi: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). doi:10.3758/lb.36.3.188. ISSN 1543-4494

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). doi:10.1080/17470210601154487. ISSN 1747-0218

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). doi:10.1037/0097-7403.31.4.433. ISSN 0097-7403

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

The influence of hippocampal lesions on the discrimination of structure and on spatial memory in pigeons (Columba livia). (2005)
Journal Article
Good, M., Erichsen, J., Haselgrove, M., Pearce, J., Good, M. A., Erichsen, J. T., …Pearce, J. M. (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. doi: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

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