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Events occurring during the retention intervals for a 5-min delayed alternation task were used to investigate the factors that influence retroactive interference. Appetitive reinforcement in an E-maze was employed to train rats on the delayed alternation task consisting of a forced-choice (target event) trial followed by a free-choice (test) trial. Occasional probe trials added a potentially interfering event either at the beginning, middle, or end of the retention period. These events also varied in similarity to the target events, ranging from low similarity to the converse of the target event. Interference increased both with the interval between the target and intervening events and with the similarity between the converse of the target event and the intervening event; however, there was no tendency, significant or otherwise, towards an interaction between stimulus similarity and the interval between the target and intervening events. Control groups demonstrated that the interference was of an associative nature and that the interval between the intervening event and the test trial was little consequence. These results are discussed in terms of two separate types of interference: similarity interference which depends on stimulus similarity of the intervening event to the converse of the target event but not on the temporal location of the intervening event, and processing interference which depends on the temporal location of the intervening event but not on its similarity to the converse of the target event.  相似文献   
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Anger at unfair treatment has been called moral outrage. However, moral outrage—anger at the violation of a moral standard—should be distinguished from personal anger at being harmed and empathic anger at seeing another for whom one cares harmed. Across a preliminary experiment and a main experiment, both designed to manipulate the appraisal conditions for these three forms of anger, we found evidence of personal anger and empathic anger, but little evidence of moral outrage. Participants perceived unfair treatment of another, even another for whom they had not been induced to feel empathy, to be as unfair as participants perceived unfair treatment of themselves. But the appraisal conditions that evoked anger were unfair treatment of self and unfair treatment of a cared-for other, not unfairness per se. In the absence of empathic concern, unfair treatment of another evoked little anger. Possible implications for understanding moral emotion and moral motivation are suggested. Copyright © 2007 John Wiley & Sons, Ltd.  相似文献   
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Presentation of unsignalled unconditioned stimuli (USs) interspersed among Pavlovian excitatory conditioning trials weakens conditioned responding to a target conditioned stimulus (CS; Rescorla, 1968). However, signalling these intertrial USs with another cue (a cover stimulus) has been shown to alleviate this degraded-contingency effect (e.g. Durlach, 1982, 1983). In contrast to signalling the inter-trial USs, the present experiments examined the effect on the degraded-contingency effect of signalling the target CS-US pairings. Experiment 1, using parameters selected to avoid overshadowing, found that consistently presenting a cover stimulus immediately prior to the target CS-US pairings during degraded-contingency training alleviated the degraded-contingency effect. Experiment 2 examined the underlying mechanism responsible for this cover-stimulus effect through posttraining associative inflation of the cover stimulus or the context, and found that inflation of the cover stimulus attenuated responding to the target CS (i.e. empirical retrospective revaluation). The results are discussed in terms of various acquisition- and expression-focused models of acquired responding.  相似文献   
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