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31.
Ellen Maas Jorien De Bie Riet Vanfleteren Wouter Hoogkamer Benedicte Vanwanseele 《Sports biomechanics / International Society of Biomechanics in Sports》2018,17(3):350-360
Fatigue, developed over the course of a run, may cause changes in running kinematics. Training status may influence the effect of fatigue on running kinematics, since well trained, competitive runners are used to running until exhaustion, whereas novice runners are not. This study aimed to determine changes in running kinematics during an exhaustive run in both novice (NOVICE) and competitive (COMP) long-distance runners. About 15 NOVICE and 15 COMP runners performed a treadmill run, until voluntary exhaustion at 3,200 m time trial pace. Joint angles and global trunk and pelvis angles were recorded at the beginning and at the end of the run. In both groups, peak pelvic anterior tilt, pelvic rotation range of motion (both during stance phase) and ankle plantar flexion during swing phase increased after the exhaustive run. There was a significant interaction effect between group and exhaustion for peak forward trunk lean, which increased only in the NOVICE group, and for hip abduction during mid-swing, which increased in NOVICE and decreased in COMP runners. In conclusion, NOVICE runners showed larger kinematic adjustments when exhausted than COMP runners. This may affect their running performance and should be taken into account when assessing a runner’s injury risk. 相似文献
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Teacher education institutes are in search of alternative models of field experiences, inspired by collaborative learning. This study examines team teaching. We focus upon the assistant teaching model, in which the student teacher assists the mentor during teaching. We investigate which assisting activities student teachers prefer, how student teachers and mentors experience these activities and the conditions for implementation they foresee. Data were gathered using activity reports, reflective documents and questionnaires. Results show that the preferred assisting activities mainly consist of guiding pupils during individual and team work and of teaching a part of a lesson in front of an entire class group. The assistant teaching model has both advantages (professional growth, …) and disadvantages (feelings of unfamiliarity, …) for the student teacher. Advantages and disadvantages have also been reported for mentors (support, high workload, …) and pupils (support, confusion, …). Finally, several conditions for successful implementation of the assistant teacher model are discussed. 相似文献
34.
Computer simulations provide environments enabling exploratory learning. Research has shown that these types of learning environments are promising applications of computer assisted learning but also that they introduce complex learning settings, involving a large number of learning processes. This article reports on an instrument for supporting one of these learning processes: stating hypotheses.The resulting instrument, an hypothesis scratchpad, was designed on the basis of a conceptual representation of the simulation model and tested in an experimental study. In this study three versions of the scratchpad, varying in structure, were compared. It was found that support offered for identifying variables, in the form of a selection list, is relatively successful: students who used this list were better in differentiating different types of variables. For identifying relations, a selection list of relations offered to the students proved unhelpful in finding accurate relations: students using this list stated their hypotheses mainly at a very global level.The research reported was conducted in the project SIMULATE. SIMULATE was part of SAFE, a R&D project partially funded by the CEC under contract D1014 within the Exploratory Action of the DELTA programme. The work of SIMULATE is continued in the DELTA main phase project SMISLE. 相似文献
35.
Nadira Saab Wouter R. van Joolingen Bernadette H. A. M. van Hout-Wolters 《Instructional Science》2007,35(1):73-98
We present a study on the effect of instruction on collaboration in a collaborative discovery learning environment. The instruction
we used, called RIDE, is built upon four principles identified in the literature on collaborative processes: Respect, Intelligent collaboration, Deciding together, and Encouraging. In an experimental study, a group of learners (ages 15–17) receiving this instruction was compared to a control group. The
learners worked in dyads on separate computers in a shared discovery learning environment in the physics domain of collisions,
communicating through a chat channel. Qualitative and quantitative analyses of the logged actions in the learning environment
and the chat protocols showed that the RIDE instruction can lead to more constructive communication, and improved discovery
learning activities, as expected, although no direct effect on discovery learning results was found. This study shows the
benefits of providing instruction on effective communication and the learning process in a collaborative discovery learning
situation. 相似文献
36.
Patrick H.M. Sins Wouter R. van Joolingen Elwin R. Savelsbergh Bernadette van Hout-Wolters 《Contemporary educational psychology》2008
Purpose of the present study was to test a conceptual model of relations among achievement goal orientation, self-efficacy, cognitive processing, and achievement of students working within a particular collaborative task context. The task involved a collaborative computer-based modeling task. In order to test the model, group measures of mastery-approach goal orientation, performance-avoidance goal orientation, self-efficacy, and achievement were employed. Students’ cognitive processing was assessed using an online log-file measure. As predicted, mastery-approach goal orientation had a significant positive effect on achievement, which was mediated through students’ use of deep processes. No significant relationships could be found between performance-avoidance goal orientation and surface processing and between surface processing and achievement. Results are discussed with respect to general theoretical implications and lead to suggestions for the design of appropriate scaffolds. 相似文献
37.
Wilma C.M. Resing Iro Xenidou-Dervou Wouter M.P. Steijn Julian G. Elliott 《Learning and individual differences》2012,22(1):144-150
We examined whether children would show different change-patterns in their strategy use when administered a number of series completion tasks that were presented within a dynamic testing format utilizing a graduated prompts approach. The role of working memory was also examined. An electronic console using tangible objects with sensors enabled the detailed recording of children's responses and solution times. We hypothesized that children who received training (i.e. who were involved in dynamic testing) would progress to more advanced strategy use than non-trained children, and that this would be evident for both verbal and behavioral measures of strategy use. We also sought to examine whether more advanced strategies would be employed by children with higher levels of WM-capacity. It was found that dynamically tested children shifted their verbal strategic behavior to a more advanced level. When examining the behavioral measure, it was found that some children showed the same progression but others who had performed at an advanced level in the pre-test shifted their strategy, unexpectedly, to a heuristic form. Working memory capacity did not appear to play an important role in differentiating between trained groups. Dynamic testing, using electronic console and tangibles with sensors, enabled us to identify strengths and weaknesses in children's learning. 相似文献
38.
Sylvia P. van Borkulo Wouter R. van Joolingen Elwin R. Savelsbergh Ton de Jong 《Journal of Science Education and Technology》2012,21(2):267-275
Computer modeling has been widely promoted as a means to attain higher order learning outcomes. Substantiating these benefits,
however, has been problematic due to a lack of proper assessment tools. In this study, we compared computer modeling with
expository instruction, using a tailored assessment designed to reveal the benefits of either mode of instruction. The assessment
addresses proficiency in declarative knowledge, application, construction, and evaluation. The subscales differentiate between
simple and complex structure. The learning task concerns the dynamics of global warming. We found that, for complex tasks,
the modeling group outperformed the expository group on declarative knowledge and on evaluating complex models and data. No
differences were found with regard to the application of knowledge or the creation of models. These results confirmed that
modeling and direct instruction lead to qualitatively different learning outcomes, and that these two modes of instruction
cannot be compared on a single “effectiveness measure”. 相似文献
39.
Jolanda Roose Wouter R. de Vries Sandor L. Schmikli Frank J.G. Backx Lorenz J.P. van Doornen 《Research quarterly for exercise and sport》2013,84(4):756-764
Overtraining (OT) as a sports phenomenon can be caused by stressors on various levels (physical, emotional, psychological, and social) and evokes responses on these levels. This study evaluated research and new opportunities in the field of OT by introducing an integrated multidisciplinary approach, based on the single and multistressors approach. The single stressor approach focuses on the training load-recovery imbalance, which results in a stagnating performance, excluding the etiology by nonsport-related factors. The multistressors approach includes all factors as relevant in the etiology of a stagnating performance. In future studies on OT, an integrative approach should not only highlight changes in training regimes and specific responses to training stressors but also focus on the role of training-related recovery, the impact of stressors, and personality factors influencing stress appraisal. This will provide a better insight into the etiology and consequences of OT, necessary for prevention and treatment in sport practice, and enhance the focus on adequate recovery (good sleep, sufficient rest periods) and athletes' stress-related responses. 相似文献
40.
Jeannette A. C. Lankhaar Wouter R. de Vries Jaap A. C. G. Jansen Pierre M. J. Zelissen Frank J. G. Backx 《Research quarterly for exercise and sport》2013,84(3):365-389
Purpose: This systematic review describes the state of the art of the impact of hypothyroidism on exercise tolerance and physical performance capacity in untreated and treated patients with hypothyroidism. Method: A systematic computer-aided search was conducted using biomedical databases. Relevant studies in English, German, and Dutch, published from the earliest date of each database up to December 2012, were identified. Results: Out of 116 studies, a total of 38 studies with 1,379 patients fulfilled the inclusion criteria. These studies emphasize the multifactorial causes of exercise intolerance in untreated patients by the impact of limitations in different functional systems, with cardiovascular, cardiopulmonary, musculoskeletal, neuromuscular, and cellular metabolic systems acting in concert. Moreover, the studies affirm that exercise intolerance in patients is not always reversible during adequate hormone replacement therapy. As a consequence, despite a defined euthyroid status, there remains a significant group of treated patients with persistent complaints related to exercise intolerance who are suffering from limitations in daily and sport activities, as well as an impaired quality of life. An explanation for this phenomenon is lacking. Only 2 studies investigated the effects of a physical training program, and they showed inconsistent effects on the performance capacity in untreated patients with subclinical hypothyroidism. Conclusions: A limited body of knowledge exists concerning exercise tolerance in treated patients with hypothyroidism, and there is an insufficient amount of quantitative studies on the effects of a physical training program. To enhance exercise and sports participation for this specific group, more research in this forgotten area is warranted. 相似文献