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1.
Analytical methods to assess thigh muscle balance need to provide reliable data to allow meaningful interpretation. However, reproducibility of the dynamic control ratio at the equilibrium point has not been evaluated yet. Therefore, the aim of this study was to compare relative and absolute reliability indices of its angle and moment values with conventional and functional hamstring–quadriceps ratios. Furthermore, effects of familiarisation and angular velocity on reproducibility were analysed. A number of 33 male volunteers participated in 3 identical test sessions. Peak moments (PMs) were determined unilaterally during maximum concentric and eccentric knee flexion (prone) and extension (supine position) at 0.53, 1.57 and 2.62 rad · s–1. A repeated measure, ANOVA, confirmed systematic bias. Intra-class correlation coefficients and standard errors of measurement indicated relative and absolute reliability. Correlation coefficients were averaged over respective factors and tested for significant differences. All balance scores showed comparable low-to-moderate relative (<0.8–0.9) and good absolute reliability (<10%). Relative reproducibility of dynamic control equilibrium parameters augmented with increasing angular velocity, but not with familiarisation. At 2.62 rad · s–1, high (moment: 0.906) to moderate (angle: 0.833) relative reliability scores with accordingly high absolute indices (4.9% and 6.4%) became apparent. Thus, the dynamic control equilibrium is an equivalent method for the reliable assessment of thigh muscle balance. 相似文献
2.
Mihye Won Heiko Krabbe Siv Ling Ley David F. Treagust Hans E. Fischer 《Educational Assessment》2017,22(2):95-110
In this study, we investigated the value of a concept map marking guide as an alternative formative assessment tool for science teachers to adopt for the topic of energy. Eight high school science teachers marked students’ concept maps using an itemized holistic marking guide. Their marking was compared with the researchers’ marking and the scores of a multiple-choice diagnostic test. Statistical analysis revealed that teachers evaluated students’ concept maps consistently, but the concept map scores were only mildly correlated with the multiple-choice test scores. We explored what each assessment method revealed in terms of students’ understanding with one student’s performance as a showcase. Teachers’ views on using the marking guide of concept maps as an assessment tool were also included. We discuss the value of the concept map marking guide as a formative assessment tool for science teachers to create and modify in order to encourage students’ conceptual learning. 相似文献
3.
The athlete’s brain exhibits significant functional adaptations that facilitate visuomotor reaction performance. However, it is currently unclear if the same neurophysiological processes that differentiate athletes from non-athletes also determine performance within a homogeneous group of athletes. This information can provide valuable help for athletes and coaches aiming to optimize existing training regimes. Therefore, this study aimed to identify the neurophysiological correlates of visuomotor reaction performance in a group of skilled athletes. In 36 skilled badminton athletes, electroencephalography (EEG) was used to investigate pattern reversal and motion onset visual-evoked potentials (VEPs) as well as visuomotor reaction time (VMRT) during a simple reaction task. Stimulus-locked and response-locked event-related potentials (ERPs) in visual and motor regions as well as the onset of muscle activation (EMG onset) were determined. Correlation and multiple regression analyses identified the neurophysiological parameters predicting EMG onset and VMRT. For pattern reversal stimuli, the P100 latency and age best predicted EMG onset (r?=?0.43; p =?.003) and VMRT (r?=?0.62; p?=?.001). In the motion onset experiment, EMG onset (r?=?0.80; p r?=?0.78; p?相似文献
4.
Thorben Hülsdünker Heiko K. Strüder Andreas Mierau 《European Journal of Sport Science》2018,18(7):955-964
Many sports require athletes to rapidly transform visual information into a targeted motor response, a process referred to as visuomotor reaction. On the behavioural level, athletes have long been established to achieve faster simple visuomotor reaction times when compared to non-athletes. However, although the superior performance in athletes has been attributed to the central nervous system, the underlying neural mechanisms remained poorly studied. More recently, a growing number of neurophysiological and neuroimaging studies systematically addressed the functional and structural modulations in the athletes’ visual and motor systems as well as their contribution to visuomotor performance. This article reviews current research on structural and functional characteristics of the athletes’ cortical visuomotor system associated with simple visuomotor reactions, sports-specific visuomotor performance and visuomotor training. The primary objective is to shed light on the neural mechanisms potentially contributing to superior visuomotor reaction performance in athletes participating in visuomotor demanding disciplines. A more comprehensive understanding of performance-determining neural functions could provide great potential for diagnostics and training to improve athletic performance. 相似文献
5.
While the importance of a supportive context for entrepreneurship is widely acknowledged, its antecedents are rarely investigated. We apply the concept of organizational climate to higher education institutions and examine the drivers of students’ perceptions of the entrepreneurial climate in their university. Combining data from two unique datasets and using multilevel techniques, we analyze the relationship between university characteristics and such climate perceptions of 8009 students at public universities in Germany. We find university entrepreneurship measures to have a positive effect on students’ climate perceptions, which also depend on students’ background and gender. In addition, we find evidence for different peer effects, depending on students’ affinity for entrepreneurship. For the general student population, including entrepreneurship content in their normal studies seems to be required to initiate a social process of sensemaking. However, students’ perception of the entrepreneurial climate only depend to a certain degree on intentional entrepreneurship measures. In our study, general university characteristics have the strongest influence on climate perceptions. Overall, our study adds to our understanding of which parameters are important for establishing a more favorable and inspiring climate for becoming an entrepreneur at higher education institutions. 相似文献
6.
There is a growing body of evidence that physical activity has under certain circumstances a positive influence on actual well-being. Actors in health sports should hence be able to investigate their actions regarding the influence on the well-being of the participants. The purpose of this review is to give an overview of the existing methods of measurement concerning actual well-being and to publish recommendations for the practical application. Therefore the search was narrowed down to multidimensional questionnaires, measuring the actual well-being. Five instruments, e. g. Positive and Negative Affect Schedule (PANAS), “Befindlichkeitsskalen” (BFS), Profile of Mood States (POMS) are finally reviewed after an introduction which outlines the categories of well-being and reviews the mechanisms which have been suggested to explain the beneficial effects of exercise. The questionnaires vary sizably concerning the theoretical background, the psychometric properties and their structure. The suitability for various domains can be verified regarding these differences. The POMS for example can be recommended because of the international comparability, the PANAS because of the time-efficient use and the BFS because of their extensive use in the German-speaking world. 相似文献
7.
This article is a general introduction into the special issue of Archival Science on “archiving research data”. It summarizes
the different contributions and gives an overview of the main issues in this special field of archiving. One of the leading
questions is how and why research data archives differ from public record offices. In the past, the developments in these
two worlds have been rather separate. There are however signs that they are converging in the digital world. In particular,
this can be seen in the areas of metadata and Internet dissemination as these are strongly influenced by the rapid changes
in information technology. These changes have also led to important new developments in the infrastructure of research data
to which special attention is paid. New concepts such as collaboratories, data curation, Open Access and the Open Archives
Initiative are discussed.
相似文献
| Heiko TjalsmaEmail: |
8.
Heiko Quast Heike Spangenberg Prof. Dr. Bettina Hannover PD Dr. Edith Braun 《Zeitschrift für Erziehungswissenschaft》2012,15(2):305-326
Even more than other European countries, Germany must fear a serious future skills shortage and lack of experts. Therefore, increasing the proportion of high school graduates who wish to study at a university is a clear political objective. The aim of this paper is to identify variables that hinder or support the decision to pursue university studies. We used longitudinal data of 23,000 graduates of upper secondary school of the years 2002, 2004, 2006, and 2008 to analyze how tuition fees (which are charged only in some of the German federal states), family status, and students?? own cost-benefit analyses impacted their decision in favor or against taking up university studies. Results showed that the subjective costs of higher education were highest for persons of low social economic background, and for women. Also, the introduction of tuition fees in some federal states in the year 2006 lowered the percentage of students who wanted to enter higher education. Contrary to our expectations, however, this effect was observed in all federal states, irrespective of whether they had introduced tuition fees or not. Our results suggest that participation in higher education can be increased by both lowering (social and psychological) costs and raising (social and psychological) benefits of higher education. 相似文献
9.
In some situations, expatriate managers and their families are encapsulated in expatriate enclaves for safety and social reasons. This type of living arrangement is frequently seen in the Middle East and other locations where safety for family members are of a high level of concern. Even in situations without strict compound-like arrangements, enclaves of expatriates are formed with their own group characteristics. It is anticipated that as MNCs focus on transition economies and emerging market countries, these enclaves and the adjustment of an expatriate to not only the cultural disparities but to these established groups will have an impact on expatriate success. This paper addresses the issues associated with being a ‘late newcomer’ to one of these self-contained compounds and the difficulties of becoming integrated into the social systems established in these enclaves. The appropriate type/level of social and organizational support is also examined. 相似文献
10.
Zusammenfassung. Um einen auf UML basierenden Entwicklungsprozess bewerten und verbessern zu können, werden Metriken für UML-Modelle definiert. Wir stellen einen Satz derartiger Metriken vor und diskutieren ihre Tauglichkeit. Unsere Metriken sind generisch definiert, sie werden zur Bewertung der einzelnen UML-Diagramme spezialisiert. Wir berichten vom Einsatz der Metriken zur Evaluation eines Prozessmodells, das in der Lehrveranstaltung Software-Praktikum eingesetzt wird. Eingegangen am 2. Januar 2001/Angenommen am 20. Dezember 2002CR Subject Classification:
D.2.2, D.2.8, D.2.9,
K.3.2, K.6.3 相似文献