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The Calhoun (1962) paper has become a keystone article for the population density literature. Although a few research reports have followed, several aspects of population density and the behavioral phenomena identified by Calhoun have been ignored. For example, the consummatory behavior in-aggregate property of the behavioral sink is an unstudied phenomenon. Furthermore, although the literature on potential population reduction mechanisms has grown rapidly, the mechanisms of pup mortality (cannibalization by adults) as identified by Calhoun has not been pursued systematically. Finally, the question of whether social or spatial density or other factors constitute the potent variables in the development of social pathology has not been tested directly. The purpose of these five related experiments was to investigate aspects of these behaviors. 相似文献
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As part of an overall effort to bring together academic and campus learning, Hamline is working on expanding its First-Year Seminar to include the broad range of student learning experiences—from residential life and work-study to academic development and career advising. The two cochairs of the First-Year Experience Task Force explain how this project is unfolding and illuminate both the challenges and the successes. 相似文献
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Everett M. Rogers Judith K. Larsen Craig Brod Jack Rochester John Gantz Indu B. Singh 《Communication Booknotes Quarterly》2013,44(3-4):28-29
SILICON VALLEY FEVER: GROWTH OF HIGH-TECHNOLOGY CULTURE by Everett M. Rogers and Judith K. Larsen (New York: Basic Books, 1984---$19.95) TECHNOSTRESS: THE HUMAN COST OF THE COMPUTER REVOLUTION by Craig Brod (Reading, Mass.: Addison-Wesley, 1984---$16.95) THE NAKED COMPUTER: A LAYPERSON'S ALMANAC OF COMPUTER LORE, WIZARDRY, PERSONALITIES, MEMORABILIA, WORLD RECORDS, MIND BLOWERS AND TOMFOOLERY by Jack Rochester and John Gantz (New York: William Morrow, l983---$15.95) TELEMATICS AND INFORMATICS edited by Indu B. Singh and Jay Liebowitz (Pergamon Press, Fairview Park, Elmsford, NY 10523----$95.00 institutions/$45.00 to individuals, quarterly) MICROCOMPUTER COMMUNICATIONS: A WINDOW ON THE WORLD by Barbara E. McMullen and John F. McMullen (New York: John Wiley, 1983---$14.95, paper) 相似文献
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The agonistic behaviors of maleBetta splendens (Regan) were studied during both mutually viewing and mutually caged encounters in an investigation of differences between these types of encounters. With the pairings of animals held constant, the experience of prior mutual viewing which produced significant habituation did not significantly alter aggression in subsequent mutually caged encounters. Furthermore, animals which exhibited submissiveness (zero display rates) during mutually caged encounters significantly increased the intensity of aggression during subsequent mutual viewing, while the dominant caged mates decreased the rate of displays. These results were interpreted to mean that mutual viewing produces habituation while mutual caging produces conditioned suppression, and that generalizations from one situation to the other may therefore be unwarranted. 相似文献
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This study examined age-related differences in the effectiveness of two generative learning strategies (GLSs). Twenty-five children aged 9–11 and 25 university students aged 17–29 performed a facts learning task in which they had to generate either a prediction or an example before seeing the correct result. We found a significant Age × Learning Strategy interaction, with children remembering more facts after generating predictions rather than examples, whereas both strategies were similarly effective in adults. Pupillary data indicated that predictions stimulated surprise, whereas the effectiveness of example-based learning correlated with children’s analogical reasoning abilities. These findings suggest that there are different cognitive prerequisites for different GLSs, which results in varying degrees of strategy effectiveness by age. 相似文献
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Anthony Garvin & Stephen Carrington 《British journal of educational technology : journal of the Council for Educational Technology》1997,28(3):191-198
The Directed–Self Education programme (DSE) in the first year undergraduate course in veterinary anatomy seeks to support students in developing personal study and information technology skills. It also aims to move computer–assisted learning (CAL) towards offering tools for students to create a variety of computer–based materials of their own which subsequently can be repurposed by staff as teaching resources. This aspect addresses the issue that many British academics have little incentive to devote time to improving teaching through CAL methods, as innovation and excellence in teaching is not rewarded in career terms on par with excellence in research. The programme seeks to integrate a modest type of "problem–based learning" (PBL) methodology without demanding the total integration of pre–clinical with clinical teaching advocated by full–scale PBL. Since 1993 the outcomes of the programme have been that lectures in the first year veterinary anatomy course have been reduced by a third, with a slight change in the mean value of the final grades in the first year final examination in veterinary anatomy during 1994–5, as compared to the years 1991–3. Other benefits have included the rapid creation of a library of student–produced CAL which is recycled by staff into other forms of computer–based teaching. It has also led to involvement in the use of CAL by lecturers hitherto resistant to applying technology to teaching, and the vacation employment of current BVSc undergraduates from the programme in university and national projects producing CAL for medical teaching. 相似文献
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