莎拉波娃不是WTA的花瓶     

Jon Wertheim 《新体育》2008,(3):57-57

上帝公平吗？在苏拉波娃拿到她的第三个大满贯之前,答案是肯定的。至少在很多人心里,老天还是先知先觉的。 可是,当莎拉波娃在墨尔本拿到个人第三个大满贯冠军后,还有人会认为这个世界公平吗？当美貌、天赋、荣耀、金钱、冠军,这所有的一切都被一个人揽于一身时,你所能做的只有一声叹息。  相似文献   

Interaction between motor ability and skill learning in children: Application of implicit and explicit approaches     

Jon P. Maxwell  Rich S.W. Masters 《European Journal of Sport Science》2017,17(4):407-416

The benefits of implicit and explicit motor learning approaches in young adults have been studied extensively, but much less in children. This study investigated the relationship between fundamental motor ability and implicit/explicit learning in children using the errorless learning paradigm. First, the motor ability of 261 children (142 boys, 119 girls) aged 9–12 years (M?=?9.74, SD?=?0.67) was measured. Second, children with motor ability scores in the upper and lower quartile learned a golf-putting skill in either an errorless (implicit) or errorful (explicit) learning condition. Four groups were formed: Errorless High-Ability (n?=?13), Errorless Low-Ability (n?=?11), Errorful High-Ability (n?=?10), and Errorful Low-Ability (n?=?11). Learning consisted of 300 practice trials, while testing included a 50-trial retention test, followed by a 50-trial secondary task transfer test, and another 50-trial retention test. The results showed that for high- and low-ability errorless learners, motor performance was unaffected by the secondary task, as was the case for high-ability errorful learners. Low-ability errorful learners performed worse with a secondary task and were significantly poorer than the corresponding high-ability group. These results suggest that implicit motor learning (errorless) may be beneficial for children with low motor ability. The findings also show a trend that children of high motor ability might benefit from learning explicitly (errorful). Further research is recommended to examine the compatibility of implicit and explicit approaches for children of different abilities.  相似文献   

Is movement variability important for sports biomechanists?     

Bartlett R  Wheat J  Robins M 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(2):224-243

This paper overviews the importance for sports biomechanics of movement variability, which has been studied for some time by cognitive and ecological motor skills specialists but, until quite recently, had somewhat been overlooked by sports biomechanists. The paper considers biomechanics research reporting inter- and intra-individual movement variability in javelin and discus throwing, basketball shooting, and locomotion. The overview does not claim to be comprehensive and we exclude such issues as the theoretical background to movement and coordination variability and their measurement. We overview evidence, both theoretical and empirical, of inter-individual movement variability in seeking to achieve the same task goal, in contrast to the concept of "optimal" movement patterns. Furthermore, even elite athletes cannot reproduce identical movement patterns after many years of training, contradicting the ideas of motor invariance and "representative" trials. We contend that movement variability, far from being solely due to neuromuscular system or measurement "noise"--as sports biomechanists may have previously supposed--is, or could be, functional. Such functionality could allow environmental adaptations, reduce injury risk, and facilitate changes in coordination patterns. We conclude by recommending that sports biomechanists should focus more of their research on movement variability and on important related topics, such as control and coordination of movement, and implications for practice and skill learning.  相似文献   

Book reviews     

Gaston Pineau  John Cameron  Helga Pfundt  Nicholas Gillett  Ilse M. Lehner  Bernd Becker  Oskar Anweiler  Dennis L. Buckley  Jon Lauglo  John Bowers 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1979,25(4):551-573

  相似文献   

Plan S and purpose: The future direction for UK learned societies     

Jon Treadway  Sarah Greaves 《Learned Publishing》2023,36(2):323-325

• A group of UK-based learned societies were anonymously interviewed to understand how trends are affecting their missions, strategies, and operations.
• The societies' missions focus on supporting academics and disseminating knowledge, with publishing being a means to achieve those goals rather than an end in itself.
• The responses were concerned about addressing open access (OA) but, particularly in the post-COVID-19 era, this was not necessarily their highest priority.
• The societies expressed reliance on larger corporate publishers on them to navigate the transition to OA publishing.
• The societies' focus is on evolving their missions to meet the changing needs of their academic communities, with issues around premises as a result of COVID-19 being more pressing than publishing industry changes.
• The societies face challenges in adapting to the shift to online and digital operations, particularly in regards to maintaining engagement with their members.

  相似文献   

A re-engineered process at Martin Marietta     

Christopher Hall  David Grau  Jon Henry 《Performance Improvement》1995,34(10):32-36

  相似文献