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Eleven healthy men (M age = 27 years, SD = 4) completed three cycling and three walking trials in an alternating order. During each trial, participants were allowed, within 3 min, to adjust the work rate to correspond to given rating of perceived exertion (RPE) values according to the following order: RPE 11, 13, and 15. For cycling as well as walking, at each RPE there were no significant differences between mean heart rate responses across the three trials (p > .05). Mode-specific estimates for heart rate intraclass correlation coefficient and coefficient of variation ranged between .80 and .91, and 5.6% and 8.3%, respectively. This study provides absolute reliability estimates for heart rate responses when using RPE in a production format and suggests there may be RPE- (and mode) specific practice requirements for achieving a reliable heart rate response at a given RPE. 相似文献
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Christos Katsanos Nikolaos Tselios Athanasios Tsakoumis Nikolaos Avouris 《Education and Information Technologies》2012,17(1):79-94
Many websites remain inaccessible for people with disabilities, despite the availability of relevant guidelines and tools.
This is mainly due to lack of appropriate training of Web designers on accessibility technology. In this paper, a project
based learning activity designed to instruct Web accessibility guidelines and good design practices is presented. The activity
is mediated by a web-based learning environment, which presents real-world examples of accessibility impasses that arise when
certain, established guidelines are violated, and then provides advice on how to avoid or resolve them. The learning material
contained in the tool is offered through a faceted browsing approach, thus enabling active exploration by the learner. A within-subjects
case study compared the learning effectiveness of traditional academic instruction (pre-condition) with the proposed project
based activity (post-condition) in the context of a University course. A significant improvement in students’ academic performance
and perceived learning was found. 相似文献
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