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21.
To compare the effectiveness of training in heat and in sweat clothing in cool conditions on improving heat tolerance, two groups of active subjects (n = 6 in each) performed an interval running heat-tolerance test before and after a 7-day experimental treatment. On each treatment day the subjects attempted to complete 4 x 15 min interval treadmill running periods (a 7.5 s effort every 30 s, on 15 km h-1, 15% grade; the same exercise format as the heat-tolerance test), which were interspersed with 5-min recovery periods (total time each day = 80 min). Group 1 (heat) ran in shorts, socks and shoes in hot humid conditions, and Group 2 (sweat clothing) ran in cool conditions dressed in shorts, socks and T-shirt covered by a polyester-cotton tracksuit, over which was worn 100% nylon spray-proof pants and jacket (cotton lined) with an acrylic cloth bobble hat (beanie) on the head. Both groups displayed changes typical of heat acclimatization over the 7-day period, with significant decreases in final rectal temperature (Tr) and heart rate (HR) being evident, but no change in sweat loss. Mean skin temperature (Tsk) was similar in both groups during the training sessions (heat group: 34.8-35.7 degrees C; sweat clothing group 34.9-35.5 degrees C). After the heat-tolerance test, both groups had significantly lower Tr, Tsk and HR values than before, and sweating sensitivity (g m-2 h-1 degrees C rise in Tr) was significantly increased. There was only one significant difference between the two groups (Tsk, 20th min value). It was concluded that training in sweat clothing in cool conditions can provide the same improvements in heat tolerance as training in hot humid conditions where a fixed exercise intensity and duration are used. 相似文献
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Phillip Dawson Michael Henderson Paige Mahoney Michael Phillips Tracii Ryan David Boud 《Assessment & Evaluation in Higher Education》2019,44(1):25-36
Since the early 2010s the literature has shifted to view feedback as a process that students do where they make sense of information about work they have done, and use it to improve the quality of their subsequent work. In this view, effective feedback needs to demonstrate effects. However, it is unclear if educators and students share this understanding of feedback. This paper reports a qualitative investigation of what educators and students think the purpose of feedback is, and what they think makes feedback effective. We administered a survey on feedback that was completed by 406 staff and 4514 students from two Australian universities. Inductive thematic analysis was conducted on data from a sample of 323 staff with assessment responsibilities and 400 students. Staff and students largely thought the purpose of feedback was improvement. With respect to what makes feedback effective, staff mostly discussed feedback design matters like timing, modalities and connected tasks. In contrast, students mostly wrote that high-quality feedback comments make feedback effective – especially comments that are usable, detailed, considerate of affect and personalised to the student’s own work. This study may assist researchers, educators and academic developers in refocusing their efforts in improving feedback. 相似文献
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Michael Henderson Michael Phillips Tracii Ryan David Boud Phillip Dawson Elizabeth Molloy 《高等教育研究与发展》2019,38(7):1401-1416
ABSTRACTDespite an increasing focus on assessment feedback, educators continue to find that simply replicating an effective feedback practice from one context does not guarantee success in the next. There is a growing recognition that the contextual factors surrounding successful practices need to be considered. This article reports on a large-scale mixed methods project and proposes 12 conditions that enable successful feedback in higher education. The conditions were distilled from seven rich case studies through multiple stages of thematic analysis, case comparison and reliability checking. The conditions were also evaluated by surveying senior leaders of Australian universities. These conditions highlight the importance of carefully designing feedback processes, along with the need for addressing capacity and culture for feedback. This helps to explain why there are such variances in effective feedback across contexts, and offers insight into how it may be achieved. 相似文献
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Mark Dawson 《Technology, Pedagogy and Education》2019,28(4):463-472
ABSTRACTGoing via Bernard Stiegler’s theorisation of technology, and his response to Chris Anderson’s claim that the era of hyper-networked, algorithmically driven digital technologies signals the end of theory, this paper aims to place the educational practice of networked learning as a space to think the edge, excess or limit of this proposed algorithmic dominance. The author discusses how networked learning can negotiate the border between educational theory, the practice of teaching and learning, and the processes and systems of educational technology, but suggests that to do this it must engage these disciplines through a thinking of technology which does not decide upon its status in advance. He argues that affirming this particular relation to technology is increasingly urgent given we are at a moment in which educational institutions are asking how to prepare our students for an age of continuing technological disruption. 相似文献
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Exploring the relationship between certification sources,experience levels,and classroom management orientations of classroom teachers 总被引:1,自引:0,他引:1
Teachers continue to report that classroom management is one of their greatest challenges in the classroom. Classroom management involves teacher's efforts to oversee classroom activities such as learning, social interaction, and student behavior. In this study, we examined the relationship between sources of teachers’ certification (traditional or alternative), teachers’ experience levels (experienced or novice), and teachers’ classroom management orientations (interventionist, non-interventionist, or interactionalist). We discovered that neither source of certification nor experience level alone impacts a teachers’ classroom management orientation. However, teachers with traditional certification and many years of experience exert significantly less control over classroom activities and students’ behaviors than do their colleagues with other educational and experimental backgrounds. Potential causes and ramifications of these findings are discussed. 相似文献
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Phillip Dawson Wendy Sutherland-Smith 《Assessment & Evaluation in Higher Education》2019,44(5):715-725
Contract cheating occurs when students outsource assessed work. In this study, we asked experienced markers from four disciplines to detect contract cheating in a set of 20 discipline-specific assignments. We then conducted a training workshop to improve their detection accuracy, and afterwards asked them to detect contract cheating in 20 new assignments. We analysed the data in terms of sensitivity (the rate at which markers spotted contract cheating) and specificity (the rate at which markers spotted real student work). Pre-workshop marker sensitivity was 58% and specificity was 83%. Post-workshop marker sensitivity was 82% and specificity was 87%. The increase in sensitivity was statistically significant, but the increase in specificity was not. These results indicate that markers can often detect contract cheating when asked to do so, and that training may be helpful in improving their accuracy. We suggest that markers’ suspicions may be crucial in addressing contract cheating. 相似文献