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On a kayak ergometer, an accurate simulation of the athlete-paddle-kayak system kinematics is essential for analysing the relationship between technique and performance. The purpose of this study
was to establish a strong relationship between performances on flatwater and performances on an ergometer by means of propulsive
force measurement and drag models. Two trials were performed by 12 kayakers in which they were first timed over 250 m of flatwater
kayaking (the reference test) and were then asked to perform a trial of the same duration on the ergometer with the same perceived
physical exertion. Three techniques for measuring propulsive force and three drag models generated nine combinations, which
were all evaluated for their ability to estimate kayak velocity. For each combination, the distance covered by the athlete
on the ergometer was simulated. A kayakers’ ergometer ranking was based on the average velocity in the ergometer trial. Both
distance and ranking were compared to the on-water results. The simulation with the best combination of force measurement
and drag model gave an accurate estimate of distance (253 ± 10.5 vs. 250 m) and ranking compared to the reference test. 相似文献
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The implementation of inclusive practices in mainstream education remains particularly difficult in the French context and is influenced by various factors including the types of disability labels, and the type of assessment practices that are used. Indeed, how student disability is labelled could impact teacher attitudes by notably disfavouring students labelled with autism. Moreover, normative assessment is strongly linked with selection at schools—a function that works against teacher attitudes towards inclusive education. This article reports on a study in which we examined teacher intentions to use materials accommodated to special educational needs students, as a function of special needs labelling. Specifically, this refers to the use of labels for either a disability or special educational need, in connection to tasks associated with learning or assessment. The results of our study revealed that, for both types of labels, the intentions to use accommodated materials are lower when teachers are asked to assess student competence than when prompted to teach this competence. These findings are discussed with consideration to the incompatibility between selection in schools—which is aligned with the principle of meritocracy—and efforts to promote inclusive education practices. 相似文献
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The inclusion of children with special educational needs is a major challenge. Amongst the factors linked to a successful inclusive education policy, teachers’ attitude toward inclusion is particularly important. The present paper seeks to understand why general teachers exhibit less favourable attitude toward inclusion than special education teachers. We argue that general teachers’ low sense of efficacy can act as a mediator. To investigate this hypothesis, general and special education teachers were asked to report their attitude and efficacy. Results confirm that general teachers have less positive attitude toward inclusion than special education teachers. In addition, a mediational analysis confirmed that this discrepancy is partly sustained by general teachers’ lower sense of efficacy. Limits as well as future perspective are discussed. 相似文献
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Mickaël Campo Stéphane Champely Benoît Louvet Elisabeth Rosnet Claude Ferrand Janet V. T. Pauketat 《Research quarterly for exercise and sport》2019,90(1):54-63
Purpose: In team sports, players have to manage personal interests and group goals, emphasizing intricacies between personal and social identities. The focus of this article was to examine the effect of identity mechanisms on appraisal processes, based on the following research question: Does the level of self-abstraction (low [personal identity] versus high [social identity]) lead to group-based emotions and influence performances? Method: An experimental design was used in which the level of self-abstraction was manipulated through the induction of a self- versus a team-oriented goal. Thirty elite male rugby players (Mage = 19.06, SD = 0.78, randomly split) participated in a match reproducing conditions similar to those of official games. Individual and perceived team-level emotions and performance were measured 17 times during the match. Results: Linear Mixed Effects models showed that a high level of self-abstraction: (a) led to more positive and less negative individual (variances explained: 52% and 46%) and perceived team-referent (variances explained: 57% and 40%) emotions; (b) reduced the correlation of team-referent emotions with individual ones; and (c) positively influenced team and individual performances (variances explained: 50% and 19%). Moreover, after controlling for potential effects of the level of self-abstraction, only positive team-referent emotions influenced performance. Conclusions: This study is the first to experimentally manipulate athletes’ social identity to examine group-based emotions in sport. Challenging the usual intrapersonal approaches, these findings suggested that social identity and its association with team-referent emotions could be one of the key dimensions of emotion-performance relationships in team sports. 相似文献
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Coopetition analyses the simultaneity of competitive and cooperative behaviours between rival firms. Scholars have focused their attention on strategic alliances, but specific coopetition issues are seldom addressed through in-depth studies. On the basis of inter-organizational relationships, coopetition provides partners with a competitive advantage by enhancing their knowledge creation and transfer, but exposes firms to the risk that rivals may capture their own knowledge. In this, it becomes necessary for firms to mix knowledge creation and transfer strategies with knowledge protection practices. This paper reports on a qualitative study of 37 firms and sheds light on the specific knowledge development process for the partners engaged in coopetition. 相似文献
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Céline Darnon Mickaël Jury Cristina Aelenei 《European Journal of Psychology of Education - EJPE》2018,33(4):713-726
Although approach forms of achievement goals (mastery and performance goals) have been shown to predict academic achievement in college, recent research underscores that these associations are rather weak and not consistently observed. The present study tests students’ social class (in the present research, generational status) as a moderator of the relationships between both mastery-approach goals and performance-approach goals and final grade. One hundred students (45 first-generation students and 55 continuing-generation students, M age = 18.9, SD = 1.52) answered an achievement goal scale related to one of their classes at the beginning of the year. Their final grade for this class was obtained three months later. As expected, performance-approach goals positively predicted final grade only for upper-class students, while mastery-approach goals tend to do so for lower-class students, supporting the idea that different kinds of motivation could predict students’ achievement depending on their social class. 相似文献
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Kinematic analysis is done by measurement of the position of bodies, followed by differentiation to get the accelerations
of the centres of mass, and it is widely used in sport research. Another common approach is to measure the forces directly.
Our intention here is to perform both a kinematic and a kinetic analysis of the same athlete-equipment system, in this case
an athlete on a sliding kayak ergometer, with the aim of exploring the errors that may occur with each measurement type. The
kayak ergometer with a sliding trolley, instrumented by seven uniaxial force sensors and two goniometers, was placed in a
filming area. The instrumentation was validated in the direction of the anteroposterior axis using Newton’s second law. Ten
athletes paddled at 92 strokes per minute, following a stationary phase. The comparison between the net force and the time-derivative
of the linear momentum indicated a friction level of about 20 N between the trolley and the frame. Other errors came mainly
from the inertial parameters of the trunk. A first analysis of contact forces shows a large inter-subject variability, in
particular for the forces applied to the footrest and the seat. 相似文献
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