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131.
David R. Shanks Susan M. Pearson Anthony Dickinson 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1989,41(2):139-159
Three experiments examined the role of the degree of temporal contiguity between an action and an outcome in human causality judgement. In all the experiments subjects were required to perform an action—pressing a key on a computer keyboard—and to judge the extent to which the action caused an outcome on the computer screen to occur. The action and outcome occurred on a free-operant schedule. In the first experiment a 2-sec delay between the action and outcome reduced causality judgements relative to a situation in which there was no delay. In the second experiment judgements in conditions with delays of 0, 4, 8, and 16 sec were compared with judgements in conditions in which the same pattern of outcomes occurred non-contingently with respect to the subjects' responding. In both of these experiments the events were controlled by random ratio schedules, following the procedure of Wasserman, Chatlosh, and Neunaber (1983), in which each condition was divided into 1-sec intervals. In the third experiment judgements in conditions with delays of 0, 2, 4, or 8 sec were compared in a continuous procedure rather than one divided into 1-sec intervals. In all experiments the increasing delays led to progressively lower judgements of causality. The results are related to three accounts of the mechanism underlying human causality judgement and are also compared with results from analogous animal conditioning studies. 相似文献
132.
Anthony Dickinson G. R. Dawson 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1987,39(3):201-213
Hungry rats were rewarded for pressing a lever on a multiple schedule. During one component the reward was a sucrose solution, whereas food pellets acted as the reward during another component. Lever pressing was never rewarded during the third component. When the drive state was switched from hunger to thirst and the animals tested in extinction, they pressed more in the presence of the component stimulus that had been associated with the sucrose reward during training. A similar effect was observed during the extinction test of a second study in which the component stimuli had signalled non-contingent presentations of either the sucrose or pellet rewards in the absence of the lever. This suggests that the instrumental irrelevant incentive effect observed in the first experiment was due, at least in part, to the Pavlovian relationship between the component stimuli and the reinforcers during training. In fact, when the size of the effects controlled by purely Pavlovian and supposedly instrumental contingencies was compared directly in the final study, no difference could be detected. 相似文献
133.
Peter F. Lovibond Anthony Dickinson 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1982,34(2):115-126
Two experiments examined interactions between conditioned appetitive and defensive responses in the rabbit. In Experiment I, a conditioned jaw-movement response was established by following presentations of a clicker CS with intra-oral sucrose delivery on 50% of trials. The jaw-movement response was then maintained on this partial reinforcement schedule during a counterconditioning phase. A group which received para-orbital shock paired with the CS on non-sucrose trials showed acquisition of eyeblink responding and suppression of jaw-movement responding to the CS, in comparison to control groups which received either no shock or unpaired presentations of the CS and shock. Experiment II was identical in design to Experiment I except that the roles of the sucrose and shock reinforcers were reversed. The paired group acquired a conditioned jaw-movement response when sucrose was added in the counterconditioning phase, but in contrast to Experiment I showed a slight enhancement of the previously established eyeblink response. The asymmetry of appetitive and defensive counterconditioning was discussed in relation to opponent-process theories of motivation and reinforcement. 相似文献
134.
Bernard Balleine Claire Garner Anthony Dickinson 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1995,48(3):235-251
In three experiments we assessed the effect of an anti-emetic, the selective S-HT antagonist ondansetron, on (1) the conditioning of a taste aversion using lithium chloride (LiCl); (2) the expression of that aversion; and (3) instrumental outcome-devaluation effects. In Experiment 1 it was found that ondansetron reduced the aversion induced by LiCl when administered prior to the LiCl injection and also attenuated the expression of that aversion when administered prior to test sessions. In Experiments 2 and 3, thirsty rats were trained, in a single session, to lever press and chain pull for sucrose and saline solutions concurrently before being injected with LiCl. They were then re-exposed to both solutions, one after injection of vehicle and the other after injection of ondansetron. In a choice extinction test on the levers and chains, animals performed more of the action whose training outcome was re-exposed under ondansetron than the other action, whether the test was conducted after an injection of vehicle or after one of ondansetron. 相似文献
135.
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137.
Anthony Dickinson G. R. Dawson 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1989,41(1):99-112
Hungry rats were trained to press a lever and pull a chain concurrently, with one action being reinforced with a sucrose solution and the other with food pellets. In addition, in the first two experiments all animals experienced non-contingent presentations of the two incentives in the absence of the operant manipulanda while either thirsty or hungry and either before (Experiment 1A) or after (Experiment 1B) the instrumental training. When lever pressing was assessed subsequently in extinction under thirst, the animals pressed at a relatively high rate only if (1) this action had been reinforced with the sucrose solution rather than the food pellets during training and (2) they had received the non-contingent presentations of the sucrose solution and food pellets on days on which they were thirsty rather than hungry. A third experiment demonstrated that non-contingent exposure to the sucrose solution alone, but not to water under thirst was sufficient to bring about this type of motivational control of instrumental performance. 相似文献
138.
A. Dickinson D. J. Nicholas N. J. Mackintosh 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1983,35(1):67-79
Three experiments on the conditioned suppression of licking in rats examined the amount of conditioning produced by a single conditioning trial to a clicker-light compound and the effect of prior conditioning to the light on the level of conditioning to the clicker. In Experiment I, prior conditioning to the light, far from blocking conditioning to the clicker, actually enhanced it, whether the clicker was presented in a simultaneous compound with the light or in a serial compound preceding the light. Experiment II, however, showed that this potentiation effect could be abolished if a trace interval was inserted between the clicker and light in the serial compound arrangement. Moreover, Experiment III demonstrated a significant blocking effect when a trace interval separated the clicker and light on the single compound trial. These results establish that one-trial blocking of conditioned suppression is possible, and suggest that in some earlier studies blocking may have been masked by higher-order conditioning to the target stimulus. 相似文献
139.
Anthony Dickinson I. P. L. McLaren 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》2003,56(1):3-6
The papers published in this Special Issue are based upon presentations at a workshop on “Associative Learning and Representation”, which was sponsored by the Experimental Psychology Society and hosted by Emmanuel College, Cambridge. The workshop celebrated the contribution of Professor Nicholas Mackintosh to animal learning and conditioning in particular and experimental psychology in general in the year of his retirement from the Chair of Psychology at the University of Cambridge after 21 years in post. The date of the workshop, 9 July 2002, was particularly auspicious as it was the day of Professor Mackintosh's birth 67 years ago. Moreover, it is particularly fitting that this tribute is published in the Comparative and Physiological Psychology Section (B) of Quarterly Journal of Experimental Psychology, which he founded in 1981 during his editorship of the Journal between 1977 and 1984. 相似文献
140.