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41.
Eric W Holman 《Learning and motivation》1975,6(3):358-366
To investigate whether consummatory and instrumental behavior depend upon different motivational factors, rats were trained to press a bar for saccharin solution, then given various treatments designed to reduce the palatability of saccharin, and finally tested for bar-pressing in extinction and for free intake of saccharin. Prefeeding with dextrose, prefeeding with saccharin, and association of saccharin with injections of lithium chloride all reduced intake of saccharin compared to control treatments, but only prefeeding with dextrose also reduced barpressing in extinction. Thus, performance of an instrumental response may depend upon need for food rather than appetite for it. 相似文献
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A group of subjects rated the similarities of all 55 pairs of 11 spices, Nonmetric multidimensional scaling of this judgment matrix indicated a single underlying dimension, interpretable as pleasantness. Short-term recognition memory for the same spices was tested in separate groups of subjects required to remember one, three, and five stimuli, respectively. Performance was best for the group remembering one stimulus, but was not affected by the number of stimuli preceding the correct stimulus in the test. The confusion matrix for the one-stimulus group, symmetrized by removal of a stimulus bias, showed a significant correlation with the judgment matrix. 相似文献
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This research examined the influence of negative political advertising frames on the thoughts and feelings people generate in response to campaign advertising. Preparing and conducting this investigation involved the use of a multiple‐method strategy. Content analysis identified two advertising frames (i.e., candidate theme and ad hoc issue advertisements) and two experiments separately induced political cynicism and politician accountability. Three hundred and sixty people participated in the experimental studies, in which they read and responded, using a thought‐listing technique, to candidate theme or ad hoc issue negative advertisements. Results demonstrated that participants were more likely to generate cynical comments and hold politicians accountable for the country's ills when reading candidate theme advertisements than ad hoc issue advertisements. The results indicate that this contributes to a political climate of cynicism and may function to erode the electorate's overall trust in government. 相似文献
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