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1.
In five conditioned taste aversion experiments with rats, summation, retardation, and preference tests were used to assess the effects of extinguishing a conditioned saccharin aversion for three or nine trials. In Experiment 1, a summation test showed that saccharin aversion extinguished over nine trials reduced the aversion to a merely conditioned flavor (vinegar), whereas three saccharin extinction trials did not subsequently influence the vinegar aversion. Experiment 2 clarified that result, with unpaired controls equated on flavor exposure prior to testing; the results with those controls suggested that the flavor extinguished for nine trials produced generalization decrement during testing. In Experiment 3, the saccharin aversion reconditioned slowly after nine extinction trials, but not after three. Those results suggested the development of latent inhibition after more than three extinction trials. Preference tests comparing saccharin consumption with a concurrently available fluid (water in Experiment 4, saline in Experiment 5) showed that the preference for saccharin was greater after nine extinction trials than after three. However, saccharin preference after nine extinction trials was not greater, as compared with that for either latent inhibition controls (Experiments 4 and 5) or a control given equated exposures to saccharin and trained to drink saline at a high rate prior to testing (Experiment 5). Concerns about whether conditioned inhibition has been demonstrated in any flavor aversion procedure are discussed. Our findings help explain both successes and failures in demonstrating postextinction conditioned response recovery effects reported in the conditioned taste aversion literature, and they can be explained using a memory interference account. 相似文献
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Residual categories are those which cannot be formally represented within a given classification system. We examine the forms
that residuality takes within our information systems today, and explore some silences which form around those inhabiting
particular residual categories. We argue that there is significant ethical and political work to be done in exploring residuality. 相似文献
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Previous research has demonstrated that discrete cues presented during extinction of a conditioned response (extinction cues) subsequently reduce spontaneous recovery and the renewal effect. In order to assess whether an extinction cue’s effect is due to conditioned inhibition, the effect of pairing an extinction cue with food on the cue’s capacity to modulate spontaneous recovery was investigated in an appetitive conditioning experiment with rats. Conditioned inhibitors paired with the unconditioned stimulus lose their potential to inhibit responding. The food-paired extinction cue did not lose its potential to reduce spontaneous recovery. In fact, it reduced spontaneous recovery more than did an extinction cue that was not paired with food. The results indicate that extinction cues attenuate postextinction recovery of conditioned responding through a mechanism other than conditioned inhibition. The cue’s action appears to be similar to that of serial negative occasion setters. Theories of spontaneous recovery and the relationship of extinction cues to other modulatory stimuli are discussed. 相似文献
4.
Leslie Halliwell Ray Armes Peter Harcourt James Robert Parish Lee R. Bowker William Kuhns 《Communication Booknotes Quarterly》2013,44(1):12-27
Leslie Halliwell's The Filmgoer's Companion (New York: Hill and Wang, 1974—$25.00) Ray Armes' Film and Reality: An Historical Survey (Baltimore: Penguin Books, 1974—$1.95, paper) Peter Harcourt 's Six European Directors: Essays on the Meaning of Film Style (Baltimore: Penguin Books, 1974—$2.50, paper) James Robert Parish' The RKO Gals (New Rochelle, N.Y.: Arlington House, 1974—$14.95) Lee R. Bowker's Elements of Film (New York: Harcourt Brace Javanovich, 1974—$5.95, paper) Jump Cut: A Review of Contemporary Cinema (3138 West Schubert, Chicago, Ill. 60647—$3.00 for 6 issues a year, or 50c each) William Kuhns' Themes Two (Dayton, Ohio: Pflaum/Standard, 1974—$4.95, paper) Raoul Walsh's Each Man in His Time: The Life Story of a Director (New York: Farrar, Straus and Giroux, 1974– $10.00) 相似文献
5.
Lynne Bowker 《Journal of Business & Finance Librarianship》2013,18(3-4):199-224
Prior research into the role of business librarians in academic program reviews has relied on surveys and interviews, revealing that librarians perceive that they are marginalized in the review process. Using a collection of program review documentation produced for the reviews of nine graduate programs offered at a Canadian business school, this study employs corpus-based techniques to obtain direct measures of librarian involvement. The findings provide objective confirmation that business librarians are not well integrated into program reviews overall, and that their contribution to the reviews of professional programs is even more limited than their contribution to the reviews of research-oriented programs. Based on best practices and missed opportunities observed as part of this study, seven strategies are suggested for integrating business librarians more fully in the program review process for the benefit of all program stakeholders. 相似文献
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Using data from a random sample of chief liberal arts academic officers in American colleges and universities, the authors examine the support of teaching in the liberal arts (defined as the natural sciences, social sciences, and humanities). Information is presented on 15 categories of faculty support for teaching and research, basic teaching conditions, tenure decisions, and merit salary increases. Differences in support are examined among institutions that vary in size, location, sponsorship, and degree level. These findings suggest that liberal arts teaching is in less than excellent health on most American campuses. In addition, the researchers note numerous inconsistencies among resources, standards, and rewards in American institutions of higher learning and urge liberal arts administrators to reduce these inconsistencies where possible. 相似文献
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As school-based action research has taken a higher profile in UK schools, the place of ethics warrants particular attention. This paper draws on evidence from a taught online Master of Education course collated via chat room discussion where 53 researching teachers were asked to explore policy within their own institution regarding school-based action research ethics. None of these teachers identified the existence of any such policies but described instead current practices. We analysed their reported school-based action research practices and discovered three major categories of response: the unexamined use of gatekeepers; the unsupported use of existing ethics guidelines (such as those of the British Educational Research Association); and the conflation of legal and ethical demands by schools. We raise questions relating to the relationship between ethics and education and call for all those involved in school-based action research to take part in developing action research ethical policy in school. 相似文献
10.
广枣提取液对小鼠免疫功能和运动耐力的影响 总被引：11，自引：0，他引：11
观察了广枣提取液对小鼠免疫功能、运动耐力的影响。结果表明：广枣提取液可明显增加小鼠耐缺氧时间，延长小鼠负重游泳时间，降低运动后小鼠血乳酸水平，显著提高其心肌组织中SOD活力；同时明显增加小鼠脾脏／体重、胸腺／体重比值，增强小鼠对巨噬细胞的吞噬能力．提高小鼠的细胞免疫、体液免疫功能。提示广枣提取液具有显著促进小鼠免疫功能及显著提高小鼠运动耐力的功效。 相似文献