Consistency of Practical and Formal Epistemologies of Science Held by Participants of a Research Apprenticeship     

Stephen R. Burgin  Troy D. Sadler 《Research in Science Education》2013,43(6):2179-2206

The purpose of this research was to examine the consistency between students’ practical and formal understandings of scientific epistemologies (also known as nature of science (NOS) understandings) in the context of a research apprenticeship program. Six high school student participants of a residential summer research apprenticeship program at a major university in the southeastern USA were interviewed twice during their experience to elicit their perspectives regarding their practical epistemologies. A phenomenological approach was used to analyze these interviews. The students held practical epistemological understandings of scientific knowledge that were described as being developmental, valuable, formulaic, and authoritative. A survey administered at the end of the program was used to reveal students’ formal epistemologies of science. These practical and formal epistemologies were described in terms of Sandoval’s (Science Education 89:634–656, 2005) epistemological themes and then compared for all participants. Findings revealed that, for most students, at least some level of consistency was present between their formal and practical epistemological understandings of each theme. In fact, for only one student with one theme, no consistency was evident. These results hold implications for the teaching, learning, and assessment of NOS understandings in these contexts as well as for the design of apprenticeship learning experiences in science.  相似文献   

An Array of Online Teaching Tools     

Stephen Bush  Gordon Menzies  Susan Thorp 《Teaching Statistics》2009,31(1):17-20

The Internet offers a huge array of teaching resources for statistics. Here we present a selection of engaging Web‐based tools, ranging from class surveys to individual simulation experiments.  相似文献   

Harsh Parenting and Child Externalizing Behavior: Skin Conductance Level Reactivity as a Moderator     

Stephen A. Erath  Mona El-Sheikh  E. Mark Cummings 《Child development》2009,80(2):578-592

Skin conductance level reactivity (SCLR) was examined as a moderator of the association between harsh parenting and child externalizing behavior. Participants were 251 boys and girls (8–9 years). Mothers and fathers provided reports of harsh parenting and their children's externalizing behavior; children also provided reports of harsh parenting. SCLR was assessed in response to a socioemotional stress task and a problem-solving challenge task. Regression analyses revealed that the association between harsh parenting and externalizing behavior was stronger among children with lower SCLR, as compared to children with higher SCLR. SCLR may be a more robust moderator among boys compared to girls. Results are discussed with regard to theories on antisocial behavior and multiple-domain models of child development.  相似文献   

Three Decades Later: Reflections on Historians,Entrepreneurs, and the Sport Industry     

Stephen Hardy 《国际体育史杂志》2018,35(7-8):623-625

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Predictive ability of the medicine ball chest throw and vertical jump tests for determining muscular strength and power in adolescents     

Daniel A. Hackett  Timothy B. Davies  Denis Ibel  Stephen Cobley  Ross Sanders 《Measurement in physical education and exercise science》2018,22(1):79-87

This study examined the predictive ability of the medicine ball chest throw and vertical jump for muscular strength and power in adolescents. One hundred and ninety adolescents participated in this study. Participants performed trials of the medicine ball chest throw and vertical jump, with vertical jump peak power calculated via an estimation equation. One-repetition maximum and peak power for the chest press and leg press were assessed using pneumatic exercise machines. The medicine ball chest throw strongly correlated with chest press one-repetition maximum and peak power, while the vertical jump peak power strongly correlated with leg press one-repetition maximum and peak power. The predictive ability of medicine ball chest throw was better than vertical jump peak power for muscular strength and power when controlling for sex, age, height, weight, and maturation, and was not affected by involvement in sports. Results show good predictive ability of the medicine ball chest throw for muscular strength and power in adolescents, while predictable ability of vertical jump peak power is weakened when other factors are taken into account.  相似文献   

Ischemic preconditioning enhances critical power during a 3 minute all-out cycling test     

Patrick J Griffin  Richard A. Ferguson  Conor Gissane  Stephen J. Bailey 《Journal of sports sciences》2018,36(9):1038-1043

This study tested the hypothesis that ischemic preconditioning (IPC) would increase critical power (CP) during a 3 minute all-out cycling test. Twelve males completed two 3 minute all-out cycling tests, in a crossover design, separated by 7 days. These tests were preceded by IPC (4 x 5 minute intervals at 220 mmHg bilateral leg occlusion) or SHAM treatment (4 x 5 minute intervals at 20 mmHg bilateral leg occlusion). CP was calculated as the mean power output during the final 30 s of the 3 minute test with W′ taken as the total work done above CP. Muscle oxygenation was measured throughout the exercise period. There was a 15.3 ± 0.3% decrease in muscle oxygenation (TSI; [Tissue saturation index]) during the IPC stimulus, relative to SHAM. CP was significantly increased (241 ± 65 W vs. 234 ± 67 W), whereas W′ (18.4 ± 3.8 vs 17.9 ± 3.7 kJ) and total work done (TWD) were not different (61.1 ± 12.7 vs 60.8 ± 12.7 kJ), between the IPC and SHAM trials. IPC enhanced CP during a 3 minute all-out cycling test without impacting W′ or TWD. The improved CP after IPC might contribute towards the effect of IPC on endurance performance.  相似文献   

‘He didn’t want to let his team down’: the challenge of dual loyalty for team physicians     

Stephen S. Hanson 《体育哲学杂志》2018,45(3):215-227

Team physicians have a complicated job that involves potentially conflicting obligations to multiple entities. Though responsible for the medical care of the athletes as individuals, they also have obligations to the team that employs them which can include returning athletes to play who are at heightened risk of re-injury. The fact that the athletes and owners have some overlapping interests (e.g. players playing well and winning games) only complicates this issue. Further, there are strong financial incentives to do what is necessary to obtain and keep a position as a team physician. This article examines dual loyalty and conflict of interest in sports medicine, and argues that there is not now a widely accepted or adequate solution to either. Moving toward a solution will require fairly serious changes in the role of the team physician.

Abbreviations: FIMS International Federation of Sports Medicine; NFL National Football League; MVP Most Valuable Player; RGIII Robert Griffin, III  相似文献   

Journals and repositories: an evolving relationship?     

Stephen PINFIELD 《Learned Publishing》2009,22(3):165-175

It is now widely accepted that there are two routes to open access (OA): OA repositories and OA journals. It is often assumed these are distinct alternative parallel tracks. However, it has recently become clear that there is potential for repositories and journals to interact with each other on an ongoing basis and between them to form a coherent OA scholarly communication system. This paper puts forward three possible models of interaction between repositories and journals; services such as arXiv and PubMed Central, and the work carried out by the RIOJA project, are working exemplars and pilot implementations of these models. The key issues associated with the widespread adoption of these models include repository infrastructure development; changing ideas of the ‘journal’, ‘article’, and ‘publication’; version management; quality assurance; business and funding models; developing value‐added features; content preservation; policy frameworks; and changing roles and cultures within the research community.  相似文献   

Use of astronomical literature—A report on usage patterns     

Edwin A. Henneken  Michael J. Kurtz  Alberto Accomazzi  Carolyn S. Grant  Donna Thompson  Elizabeth Bohlen  Stephen S. Murray 《Journal of Informetrics》2009,3(1):1-8

In this paper we present a number of metrics for usage of the SAO/NASA Astrophysics Data System (ADS). Since the ADS is used by the entire astronomical community, these are indicative of how the astronomical literature is used. We will show how the use of the ADS has changed both quantitatively and qualitatively. We will also show that different types of users access the system in different ways. Finally, we show how use of the ADS has evolved over the years in various regions of the world.  相似文献   

Personal epistemologies, work and learning   总被引：1，自引：0，他引：1  

Stephen Billett   《Educational Research Review》2009,4(3):210-219

This paper elaborates the role and development of personal epistemologies when learning through and for work. It does this by drawing on explanatory propositions from psychology, sociology and philosophical accounts. The aim here is to go beyond conceptions of epistemological beliefs and to position personal epistemologies as being active, intentional, derived in personally particular ways through the unique set of socially derived experiences that comprise individuals’ life histories or ontogenies. In this way, they are held to be comprehensive and encompassing as a conception to explain individuals’ learning and as constructed through social experiences, albeit in person-specific ways. Given their active and constructive character, these epistemologies are placed centre stage in the dual processes of learning and remaking culturally derived practices, such as with paid work. These propositions are discussed and elaborated through a consideration of engagement and learning in forms of work that provide, respectively, relatively weak and rich forms of direct social guidance, and which require the enactment in different ways of individuals’ personal epistemologies in the conduct of and learning through paid work.  相似文献