Decision-making is a key component of an umpire’s in-game performance, with each decision potentially having a direct impact on the result of the game. Additionally, umpires have to be physically fit to ensure they keep up with the gameplay. While research has identified the decision-making demands and running demands of umpires separately, few have explored the relationship between them. The aim of this investigation was to examine the relationship between physical exertion and decision-making performance of Australian football umpires at the sub-elite and junior levels. A total of 18 Australian football umpires (sub-elite, n = 10; junior n = 8) performed 10 × 300 m runs, with each repetition immediately followed by a video-based decision-making test, then 1 min of recovery. A Mann–Whitney U assessment indicated a significant difference between the sub-elite and junior level umpires for decision-making accuracy (U = 13.00, z = ?2.43, P = 0.016, r = ?0.5). However, there was no significant difference in response time (U = 28.00, z = ?1.07, P = 0.315, r = ?0.25). The sub-elite umpires completed the running efforts in significantly less time than the junior umpires (P< 0.05). Further, there was no significant correlation between decision-making performance and running times for either skill level (P> 0.05). This suggests decision-making performance may not be affected by physical exertion. Therefore, it may be suggested coaches of football umpires allocate more time to the decision-making development of their umpires instead of focusing largely on the physical fitness side, as is currently the trend. 相似文献
Background: Many alternative curricular models exist in physical education to better meet the needs of students than the multi-activity team sports curriculum that dominates in the USA. These alternative curricular models typically require different content knowledge (CK) and pedagogical CK (PCK) to implement successfully. One of the complexities of learning to teach these models for pre-service teachers (PTs) is understanding the different CK and PCK required which is compounded by their personal lack of experience of the model.
Purpose: The purpose of this study was to explore the PCK enacted by PTs learning to teach an alternative curricular model (adventure-based learning [ABL]) in urban middle schools.
Research design: Qualitative methods were used to explore how the PTs demonstrated their PCK while teaching an ABL unit to urban middle school students. The study took place at a major university and in three middle schools in a large urban school district in Midwestern USA.
Participants: Thirteen PTs enrolled in the secondary methods course and associated internship agreed to participate in this study. The PTs (five males and eight females) ranged in age from 21 to 26 years and all self-identified as white.
Data collection and data analysis: Three methods of data collection were employed in this study: interviews, daily reflections called critical friends, and stimulated recall reflection of teaching an ABL lesson. Data were analyzed using constant comparison. Trustworthiness was established through triangulation of the data using multiple data sources, peer debriefing, member checking, and negative case analysis.
Findings: Four themes represented the PTs' demonstration of PCK when learning to teach ABL in urban middle schools. The themes were (a) trusting the sequence, (b) knowing your students, (c) facilitate don't dictate, and (d) processing the experience. The findings provide further insight into the demonstration of PTs' PCK in secondary physical education, and specifically relative to teaching ABL in urban middle schools. To better equip PTs to be able to teach using these models, we recommend the following: (a) they have the opportunity to ‘live the curriculum' in their PETE programme, (b) developing the PTs' specific CK and student-centered pedagogical knowledge for specific alternative curricular models is imperative in developing the PCK for such model, (c) developing PTs' knowledge of students relative to the complexities of learning to teach each specific model, (d) observing an expert teach the model to K-12 students, and (e) recognizing that learning to teach these models is a developmental process and providing the PTs with an emotionally safe and caring space to explore teaching such models is crucial. 相似文献
Two pigeons were trained on a six-key modified oddity-from-sample procedure. The stimuli were olor pictures of birds, butterflies, and human faces. Initially, the third peck on the sample key which presented one of three different bird pictures) lit only one comparison key. Every three dditional pecks on the sample illuminated another comparison key. Fifteen sample pecks produced he maximum of five comparison stimuli. A peck on the comparison key that presented the non-atching bird picture produced grain. Pecks on matching keys turned off all the comparison keys nd repeated the trial. The birds learned to peck each sample until the non-matching comparison timulus was produced, and then to peck that key. After acquisition (70%–90% accuracy), the hree bird stimuli were replaced by a new set of three bird pictures. Subsequent phases provided ew sets of bird, butterfly, and human face stimuli. Both birds showed transfer of oddity learning o the novel samples. The data suggest that the birds may have been engaging in conceptual-type oddity learning, rather than learning discrete five-key discriminations or a series of two component chains. 相似文献
The paper delineates and explains an emerging, but significant, form of digital information seeking behaviour among information consumers, which the authors have called ‘bouncing’. The evidence for this behaviour has emerged from five years of deep log analysis studies – an advanced form of transaction log analysis – of a wide range of users of digital information resources. Much of the evidence and discussion provided comes from the scholarly communication field. Two main bouncing metrics were applied in the log studies: site penetration, which is the number of items or pages viewed in a session, and return visits. The evidence shows that (1) a high proportion of people view just a few items or pages during a visit to a site and, (2) a high proportion of visitors either do not come back to the site or they did so infrequently. Typically those who penetrated a site least tended to return the least frequently. These people are termed ‘bouncers’. They bounce into the site and then bounce out again, presumably, to another site, as a high proportion of them do not appear to come back again. Possible explanations – negative and positive, for the form of behaviour are discussed. 相似文献
Extensive research has examined the validity and fairness of standardized tests in academic admissions. However, due to their underrepresentation in higher education, American Indians have gained much less attention in this research. In the present study, we examined for American Indian students (1) group differences on SAT scores, (2) the predictive and incremental validity of SAT over high school grades, (3) the effect of socioeconomic status on SAT validity, (4) differential prediction in the use of SAT scores, and (5) potential omitted variables that could explain differential prediction for American Indian students. Results provided evidence of predictive and incremental validity of SAT scores, and the validity of SAT scores was largely independent of socioeconomic status. Overprediction was found when using SAT scores to predict college performance and it was reduced when including high school grades as an additional predictor. This study provides substantial evidence of the validity and fairness of SAT scores for American Indians. 相似文献
Requirements for reasoning, explaining, and generalizing mathematical concepts increase as students advance through the educational system; hence, improving overall mathematical proficiency is critical. Mathematical proficiency requires students to interpret quantities and their corresponding relationships during problem‐solving tasks as well as generalizing to different contexts; both requirements are particularly challenging for many students with learning disabilities. An in‐depth review of research was completed to (1) demonstrate how interventions targeting mathematical problem solving are categorized into heuristic, semantic, or authentic approaches; (2) explore the degree to which generalization is presented in each approach; and (3) determine the efficacy of each intervention approach. Experimental studies (n = 17) demonstrating the effects of interventions designed to enhance mathematical problem solving for secondary students with or at risk of learning disabilities were analyzed. Findings indicate that the efficacy of the three intervention approaches varies, and that the real‐world connections differ. Implications for research and practice are discussed. 相似文献
