Choose your primary outcome variables with care     

Simon A. Jobson  Alan Nevill  Greg Atkinson 《Journal of sports sciences》2013,31(4):313-314

The changes in postural tremor of the hand and the subsequent effect on shooting performance produced by moderate cooling and heating of the forearm were studied in six subjects. Cooling produced a large decrease in tremor size of the ipsilateral hand, whereas warming the limb produced an increase in tremor size. Cooling or warming the forearm did not change the peak frequency of tremor significantly, which was quite stable for each subject. The improvement in shooting performance after cooling the forearm, as measured by grouping pattern of the shots, reached statistical significance and warming caused a significant worsening. This measure of performance was shown to correlate (r = 0.776) inversely with tremor size. The causes and implications of these changes are discussed. It is suggested that local cooling may be useful for people who wish temporarily to reduce tremor in order to improve dexterity for shooting and for other purposes.  相似文献   

Throwing performance in water polo is related to in-water shoulder proprioception     

Andrea H. Hams  Kerrie Evans  Roger Adams  Gordon Waddington  Jeremy Witchalls 《Journal of sports sciences》2013,31(22):2588-2595

ABSTRACT

Water polo players require a high level of upper-extremity strength, flexibility and coordination to achieve a peak level of throwing performance. Increased levels of shoulder proprioceptive acuity, strength and range of motion (ROM) have been previously associated with higher sporting performance. A coach-rating scale, used to quantify an athlete’s kicking proficiency in soccer; was adapted in the current study to measure each coach’s subjective expert opinion regarding athletes’ throwing mechanics, velocity, and accuracy. To examine this hypothesis shoulder proprioception acuity of 18 water polo players was measured both in-water and on-land using an AMEDA apparatus and correlated with coach-rated throwing performance and clinical measures of shoulder strength and ROM. There was a moderate positive correlation between the in-water and the on-land proprioception acuity (r = 0.47, p < 0.05). The in-water score showing a strong positive correlation with coach rated throwing mechanics (r = 0.68, p < 0.05) and velocity (r = 0.75, p = 0.02), suggesting that superior proprioception acuity contributed to fast, mechanically-efficient throwing. These findings support the notion that in-water proprioceptive acuity is an important determinant of the throwing performance achieved by water polo athletes and its measurement may be a valuable adjunct to current athlete screening.  相似文献   

Interleukin-6 and Delayed Onset Muscle Soreness Do Not Vary During the Menstrual Cycle     

Morgan E. Chaffin  Kris E. Berg  Jessica R. Meendering  Tamra L. Llewellyn  Jeffrey A. French  Jeremy E. Davis 《Research quarterly for exercise and sport》2013,84(4):693-701

The purpose of this study was to determine if a difference in interleukin-6 (IL-6) and delayed onset muscles soreness (DOMS) exists in two different phases of the menstrual cycle. Nine runners performed one 75-min high-intensity interval running session during the early follicular (EF) phase and once during the midluteal (ML) phase of the menstrual cycle. Estrogen and progesterone levels were significantly reduced in the EF phase when compared to the ML phase. IL-6 levels increased from pre- to postexercise in the EF and ML phases (p < .001). There was no relationship between the IL-6 level and DOMS. The results suggest that menstruating female runners need not vary training throughout the month to reduce DOMS.  相似文献   

Variable versus constant power strategies during cycling time-trials: Prediction of time savings using an up-to-date mathematical model     

G. Atkinson  O. Peacock  L. Passfield 《Journal of sports sciences》2013,31(9):1001-1009

Abstract

Swain (1997 Swain, D. P. 1997. A model for optimizing cycling performance by varying power on hills and in wind. Medicine and Science in Sports and Exercise, 29: 1104–1108. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) employed the mathematical model of Di Prampero et al. (1979 Di Prampero, P. E., Cortili, G., Mognoni, P. and Saibene, F. 1979. Equation of motion of a cyclist. Journal of Applied Physiology, 47: 201–206. [PubMed], [Web of Science ®] , [Google Scholar]) to predict that, for cycling time-trials, the optimal pacing strategy is to vary power in parallel with the changes experienced in gradient and wind speed. We used a more up-to-date mathematical model with validated coefficients (Martin et al., 1998 Martin, J. C., Milliken, D. L., Cobb, J. E., McFadden, K. L. and Coggan, A. R. 1998. Validation of a mathematical model for road cycling power. Journal of Applied Biomechanics, 14: 276–291. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) to quantify the time savings that would result from such optimization of pacing strategy. A hypothetical cyclist (mass = 70 kg) and bicycle (mass = 10 kg) were studied under varying hypothetical wind velocities (?10 to 10 m · s^?1), gradients (?10 to 10%), and pacing strategies. Mean rider power outputs of 164, 289, and 394 W were chosen to mirror baseline performances studied previously. The three race scenarios were: (i) a 10-km time-trial with alternating 1-km sections of 10% and ?10% gradient; (ii) a 40-km time-trial with alternating 5-km sections of 4.4 and ?4.4 m · s^?1 wind (Swain, 1997 Swain, D. P. 1997. A model for optimizing cycling performance by varying power on hills and in wind. Medicine and Science in Sports and Exercise, 29: 1104–1108. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]); and (iii) the 40-km time-trial delimited by Jeukendrup and Martin (2001 Jeukendrup, A. E. and Martin, J. 2001. Improving cycling performance: How should we spend our time and money?. Sports Medicine, 31: 559–569. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). Varying a mean power of 289 W by ± 10% during Swain's (1997 Swain, D. P. 1997. A model for optimizing cycling performance by varying power on hills and in wind. Medicine and Science in Sports and Exercise, 29: 1104–1108. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) hilly and windy courses resulted in time savings of 126 and 51 s, respectively. Time savings for most race scenarios were greater than those suggested by Swain (1997 Swain, D. P. 1997. A model for optimizing cycling performance by varying power on hills and in wind. Medicine and Science in Sports and Exercise, 29: 1104–1108. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). For a mean power of 289 W over the “standard” 40-km time-trial, a time saving of 26 s was observed with a power variability of 10%. The largest time savings were found for the hypothetical riders with the lowest mean power output who could vary power to the greatest extent. Our findings confirm that time savings are possible in cycling time-trials if the rider varies power in parallel with hill gradient and wind direction. With a more recent mathematical model, we found slightly greater time savings than those reported by Swain (1997 Swain, D. P. 1997. A model for optimizing cycling performance by varying power on hills and in wind. Medicine and Science in Sports and Exercise, 29: 1104–1108. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). These time savings compared favourably with the predicted benefits of interventions such as altitude training or ingestion of carbohydrate-electrolyte drinks. Nevertheless, the extent to which such power output variations can be tolerated by a cyclist during a time-trial is still unclear.  相似文献   

The Responsible Anarchist: Postmodernism and social change   总被引：1，自引：0，他引：1  

Elizabeth Atkinson 《British Journal of Sociology of Education》2002,23(1):73-87

In recent years, the adoption of postmodern theoretical perspectives within educational research has prompted strong critical reaction. For some critics (particularly Marxist researchers), the greatest fault of postmodernism is that it lacks an agenda for social change. This paper takes issue with this argument, and with four associated arguments: (1) that postmodernism disempowers those to whom it claims to give voice; (2) that it appeals only to intellectuals and has no practical value; (3) that it denies the possibility of the construction of a new social order; and (4) that it colludes with the status quo in its refusal to act. Addressing each of these points in turn, the author suggests that, contrary to the view of these critics, postmodernism offers a powerful force for social change, through the acceptance of uncertainty, the acknowledgement of diversity and the refusal to see concepts such as 'justice' or 'society' as fixed, or as governed by unassailable 'truths'.  相似文献   

The Concept of the ‘Small Secondary School’     

Jeremy Richmond 《Educational studies》1992,18(3):267-275

School size is becoming an increasingly important factor in discussions concerning school effectiveness, particularly those concerning cost‐effectiveness. Unfortunately, the term ‘small‐school’ is used in several different ways and lacks clarity. This paper examines the present usage of this term in order to construct a definition that could be incorporated into effectiveness research design.  相似文献   

PISA for Development: how the OECD and World Bank shaped education governance post-2015     

Euan Auld  Jeremy Rappleye  Paul Morris 《比较教育学》2019,55(2):197-219

ABSTRACT

The year 2015 was significant for the arena of international development, as UNESCO’s Education for All agenda was replaced by Education 2030, which would identify minimum standards of education quality. The OECD had been working on extending its existing PISA assessment into low- and middle-income countries through PISA for Development (PISA-D) and positioned the new assessment as a means of tracking progress on the post-2015 goals. The organisation maintains that PISA-D was introduced primarily in response to the demands of the international community, especially low- and middle-income countries, and that the assessment was developed in partnership with them. This paper investigates those claims through an analysis of the arrival of PISA-D in Cambodia, situating the analysis within UNESCO’s shifting agenda and the strategic visions of the OECD and World Bank that first emerged in the 1990s. The result is a very different picture to the portrayals of local agency, demand, consensus and partnership that adorn the official websites and pamphlets of global agencies and much academic research, raising serious doubts about education governance post-2015.  相似文献   

EMPIRICAL SYNTHESIS OF THE EFFECT OF STANDARD ERROR OF MEASUREMENT ON DECISIONS MADE WITHIN BRIEF EXPERIMENTAL ANALYSES OF READING FLUENCY          下载免费PDF全文

Matthew K. Burns  Crystal N. Taylor  Kristy L. Warmbold‐Brann  June L. Preast  John L. Hosp  Jeremy W. Ford 《Psychology in the schools》2017,54(6):640-654

Intervention researchers often use curriculum‐based measurement of reading fluency (CBM‐R) with a brief experimental analysis (BEA) to identify an effective intervention for individual students. The current study synthesized data from 22 studies that used CBM‐R data within a BEA by computing the standard error of measure (SEM) for the median data point from the baseline and intervention data. The median CBM‐R score from the intervention that the authors of each study identified as most effective fell within the SEM (68% confidence interval) of the baseline data approximately 30% of the time, but the ranges for the two author‐identified most effective interventions overlapped over 75% of the time. Extended analyses were consistent with the BEA results for approximately three‐fourths of the instances after considering the SEM of the baseline and intervention phases. Using matched passages did not improve the overlap of the ranges, but there was less overlap when the study used three data points per condition. Results emphasize the importance of considering SEM of CBM‐R data when comparing interventions within a BEA. Further implications for practice and future research are included.  相似文献   

The Two Traditions in Educational Ethnography: sociology and anthropology compared∗     

Sara Delamont  Paul Atkinson 《British Journal of Sociology of Education》1980,1(2):139-152

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Pedagogical Considerations in the Application of New Technologies to Teacher Education     

Terry Atkinson 《欧洲师范教育杂志》1997,20(1):101-106

This paper considers the traditional pedagogies underpinning the use of technology in order to deliver learning in educational settings and the lessons that can be drawn for the case of teacher education. It then considers the pedagogy of teacher education itself in order to propose an integrated pedagogical model for the delivery of teacher education by means of the new technologies. It concludes with the view that technology can and should be applied to teacher education but that this might best be viewed as an evolutionary process rather than a revolutionary one.  相似文献