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991.
Duschl Richard A. Deaák Gedeon O. Ellenbogen Kirsten M. Holton Douglas L. 《Science & Education》1999,8(5):525-542
Eric Schwitzgebel presents an attractive argument for the use of affective indicators to both assess and extend the 'theory theory' research agenda. A key component of his argument is an account of explanation that can be applied to both children and adults, few of whom possess the attributes and behaviors that warrant being called scientists. The core features of his account include 1) regarding a set of propositions as a theory and 2) subscribing to a theory by accepting and employing this set of propositions to explain events within the theory's domain. We will argue that this account, while potentially helpful for guiding research on the affective content of explanations, requires elaboration because it (1) does not fully characterize what is distinctive and important about theoretical and scientific thinking, (2) raises questions about different kinds of explanations, such as seen in transitions from common-sense explanations to theoretical explanations; (3) favors individual theorizing to the exclusion of socially mediated theorizing, and (4) raises developmental questions about the nature of explanation-seeking and the capacity to apply evidence to evaluate theories. 相似文献
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The aims of this study were to compare the physiological and anthropometric characteristics of successful mountain bikers and professional road cyclists and to re-examine the power-to-weight characteristics of internationally competitive mountain bikers. Internationally competitive cyclists (seven mountain bikers and seven road cyclists) completed the following tests: anthropometric measurements, an incremental cycle ergometer test and a 30 min laboratory time-trial. The mountain bikers were lighter (65.3+/-6.5 vs 74.7+/-3.8 kg, P= 0.01; mean +/- s) and leaner than the road cyclists (sum of seven skinfolds: 33.9+/-5.7 vs 44.5+/-10.8 mm, P = 0.04). The mountain bikers produced higher power outputs relative to body mass at maximal exercise (6.3+/-0.5 vs 5.8+/-0.3 W x kg(-1), P= 0.03), at the lactate threshold (5.2+/-0.6 vs 4.7+/-0.3 W x kg(-1), P= 0.048) and during the 30 min time-trial (5.5+/-0.5 vs 4.9+/-0.3 W x kg(-1), P = 0.02). Similarly, peak oxygen uptake relative tobody mass was higher in the mountain bikers (78.3+/-4.4 vs 73.0+/-3.4 ml x kg(-1) x min(-1), P = 0.03). The results indicate that high power-to-weight characteristics are important for success in mountain biking. The mountain bikers possessed similar anthropometric and physiological characteristics to previously studied road cycling uphill specialists. 相似文献
993.
Douglas Reimondo Robertson 《Innovative Higher Education》2005,29(3):181-194
The discussion identifies six contradictions that characterize the emergent learner-centered teaching role: (a) control/flow, (b) facilitator/evaluator, (c) teacher learning/student learning, (d) subject expert/teaching expert, (e) caring for students/caring for self, and (f) individual mentor/group leader. Key concepts are presented (conflict, compartmentalized paradox, and generative paradox) which represent points on a continuum of the degree to which college teachers have successfully integrated these fundamental contradictions in the learner-centered teaching role. This article extends an ongoing discussion of integrity in learner-centered teaching by providing a conceptual paradigm and examples for developing consistently productive responses to these six fundamental contradictions in learner-centered teaching.Douglas Reimondo Robertson (Ph.D., Syracuse University) is Assistant Provost for Professional Development Programs and Professor of Educational Leadership at Northern Kentucky University. His most recent line of research focuses on further developing the emergent concept and practice of learner-centered college teaching. 相似文献
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Eveland William P. Jr.; McLeod Douglas M.; Signorielli Nancy 《Int. Journal of Public Opinion Research》1995,7(2):91-109
This study analyzes actual and perceived support for the PersianGulf War in the United States. Data were collected from 292residents of New Castle County, Delaware, during the 1991 GulfWar. Results show that support for the war was not the strongconsensus reported in mainstream media. In fact, 53.1 percentof the respondents fell within the neutral, disagree, or stronglydisagree ranges of a support for the war scale. Only 6.6 percentof the respondents were in the strong support range. However,responses were significantly higher on an item measuring perceivedsupport for the war. Consistent with Noelle-Neumann's spiralof silence theory, perceived public support for the war wasa significant predictor of support for the war even after 13variables were controlled. The alternative explanation thatsubjects were ‘projecting’ their own perceptionsonto the public, is discounted by the finding that liberals,moderates and conservatives did not differ in their perceptionsof public support. 相似文献
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