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131.
Within-trial contrast has been proposed as a mechanism underlying preferences for stimuli that follow relatively more aversive
events over stimuli that follow less aversive events. In this study, we manipulated deprivation level to test within-trial
contrast predictions. In Experiment 1, pigeons encountered two discriminative stimuli, one presented when they were deprived
and the other when they were prefed. When later given a choice between the two stimuli, pigeons strongly preferred the stimulus
encountered when deprived, independently of their deprivation level at test. In Experiment 2, pigeons learned two simultaneous
discriminations, one when deprived and the other when prefed. Here, subsequent tests between the two S+ or the two S− stimuli revealed no consistent preferences. These contrasting findings suggest that differential aversiveness is necessary
but not sufficient to induce preferences via within-trial contrast. 相似文献
132.
本文介绍的Porta-bile项目正在特伦托大学(University of Trento)开展,旨在研究移动计算技术在教育环境中对学习过程的支持作用.这个项目主要关注移动学习中的技术因素,它们与e-Learning系统的整合以及与学术机构的信息系统的整合.这个项目是建立在特伦托大学经济学院使用的e-learning学习平台的大量源代码研究以及对整个特伦托大学使用的新平台所收集的大量经验和数据基础上. 相似文献
133.
Marco Antonio R. Dias 《Higher Education in Europe》1995,20(1-2):96-107
Although admittedly quality is very hard to define, UNESCO, particularly its European Centre for Higher Education and its Division of Higher Education, have undertaken a number of actions to further quality in higher education. Thus CEPES created EGAA (European Group on Academic Assessment) and the Division of Higher Education stressed the questions of quality in higher education in a recently prepared UNESCO draft policy paper. A strong component of the UNESCO UNITWIN and UNESCO Chairs Programme is directed at improving the quality of universities and university programmes in developing countries. The effort in favour of quality thus dovetails into other policies and actions of UNESCO, such as those in favour of the development of Centres of Excellence in the academic world. Yet quality improvement should not mean the imposition of one university model throughout the world but drawing upon what is best in local customs and indigenous culture.
134.
Stéphanie Grosdent Christophe Demoulin Carlos Rodriguez de La Cruz Romain Giop Marco Tomasella Jean-Michel Crielaard 《Journal of sports sciences》2016,34(11):1021-1029
This study aimed to investigate the relationship between the history of low back pain and quality of lumbopelvic motor control in soccer players. Forty-three male elite soccer players (mean age, 18.2 ± 1.4 years) filled in questionnaires related to low back pain and attended a session to assess lumbopelvic motor control by means of five tests (the bent knee fall out test, the knee lift abdominal test, the sitting knee extension test, the waiter’s bow and the transversus abdominis test). A physiotherapist, blinded to the medical history of the participants, scored (0 = failed, 1 = correct) the performance of the players for each of the tests resulting in a lumbopelvic motor control score ranging from 0 to 5. Forty-seven per cent of the soccer players reported a disabling low back pain episode lasting at least two consecutive days in the previous year. These players scored worse lumbopelvic motor control than players without a history of low back pain (lumbopelvic motor control score of 1.8 vs. 3.3, P < 0.01). The between-groups difference was particularly marked for the bent knee fall out test, the knee lift abdominal test and the transversus abdominis test (P < 0.01). In conclusion, most soccer players with a history of low back pain had an altered lumbopelvic motor control. Further research should examine whether lumbopelvic motor control is etiologically involved in low back pain episodes in soccer players. 相似文献
135.
136.
This article outlines the development of a tool called “eZoomBook”, that allows contributors to customize the length of documents and provide the end-user (i.e., potential readers on the platform) the means to “zoom in” or “zoom out” of the original document, thus giving readers a choice to read either the full version (always present on the platform) or modified shorter versions that contributors create using the eZoomBook tool and methodology. This article explores the ways the tool can be used to make reading more “learner-friendly” in the classroom setting and it highlights possibilities of having add-on applications to the platform such as learning games (MyGame-4U). It shows how the eZoomBook methodology combined with the MyGame-4u add-on has the potential to make reading more engaged, and finally opens up perspectives for development of other applications of the tool and areas for future research. 相似文献
137.
138.
In line with theoretical approaches, such as the influence of presumed influence approach, many studies have shown that the stronger individuals perceive the media’s influence to be on others, the more the individuals demand restrictions on the media and its influence. However, these studies provided information only about the correlation between the two constructs and did not test the direction of their causal relationship. To close this research gap, a two-wave panel study among German citizens was conducted. The results show that, rather than being the other way around, it is the presumed strength of online media’s political influence on others that affects demands for restrictions. Moreover, the findings indicate that the presumed political influence of online media on others also affects the presumed reach of online media. 相似文献
139.
140.