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81.
The long jump has been widely studied in recent years. Two models exist in the literature which define the relationship between selected variables that affect performance. Both models suggest that the critical phase of the long jump event is the touch-down to take-off phase, as it is in this phase that the necessary vertical velocity is generated. Many three dimensional studies of the long jump exist, but the only studies to have reported detailed data on this phase were two-dimensional in nature. In these, the poor relationships obtained between key variables and performance led to the suggestion that there may be some relevant information in data in the third dimension. The aims of this study were to conduct a three-dimensional analysis of the touch-down to take-off phase in the long jump and to explore the interrelationships between key variables. Fourteen male long jumpers were filmed using three-dimensional methods during the finals of the 1994 (n = 8) and 1995 (n = 6) UK National Championships. Various key variables for the long jump were used in a series of correlational and multiple regression analyses. The relationships between key variables when correlated directly one-to-one were generally poor. However, when analysed using a multiple regression approach, a series of variables was identified which supported the general principles outlined in the two models. These variables could be interpreted in terms of speed, technique and strength. We concluded that in the long jump, variables that are important to performance are interdependent and can only be identified by using appropriate statistical techniques. This has implications for a better understanding of the long jump event and it is likely that this finding can be generalized to other technical sports skills. 相似文献
82.
In this interview, Dr. Kimmo Lehtonen discusses the current “state of the art” regarding creativity in Scandinavia, Europe, and around the world. He explores the training of teachers, prodigies, and art and music therapy. Dr. Lehtonen examines the issue of computers relative to creativity and various theoretical explanations for the phenomenon of creativity. Personality factors are examined and explored, and future concerns are delineated. 相似文献
83.
Adrian Fordham 《Research in Science Education》1980,10(1):107-117
Conclusion This paper has been concerned with the application of basic understandings about intrinsic motivation and curiosity behaviour
to the teaching of science, and in particular senior high school biology. The important role of student knowledge in the generation,
maintenance and resolution of cognitive conflict is congruent with the renewed interest in studying students' everyday knowledge
of curriculum content. However the study of classroom teaching processes in terms of their facilitation of intrinsic motivation
is not common. Yet the data collected in this study demonstrates the importance of closely examining the implementation of
courses such as the Web of Life, if the arousal of intrinsic motivation is an intended student outcome. Both interview and
observational data indicated that the teaching styles adopted by teachers in this study were not likely to engender curiosity
amongst students. Perhaps this should be expected. The use of a wide range of reference materials to investigate problems
that arise in the classroom, the encouragement of students to do additional work on a topic if they are particularly interested,
and a willingness on the part of the teacher to allow students sufficient time to formulate their own solutions to problems
are classroom processes which necessitate a greater flexibility in curriculum presentation than can be often tolerated by
teacher and school management. Such processes may be incompatible with organisational properties of the school and the pressures
often placed upon students to perform to a high standard on rigidly defined examinations. 相似文献
84.
Mass media campaigns are conducted to influence community norms around health behaviours, including physical activity. Campaigns can reach large populations at relatively low cost, to influence awareness, knowledge and beliefs through to intention and behaviour change. We reviewed 15 campaigns with an explicit focus on physical activity, and explored impacts upon a range of proximal and distal variables. Campaigns achieved high recall, with a median of 70% of the target group aware of the campaign. Increases in knowledge or attitudes to physical activity were found among half the campaigns that reported this measure. Few campaigns reported other proximal variables, such as saliency, beliefs, self-efficacy or behavioural intention. Increases in physical activity were reported among motivated sub-groups of volunteers, but few campaigns reported population increases in activity. Campaigns increase awareness of the issue of physical activity but may not have a population-level effect on behaviour. Campaigns should focus more on influencing proximal variables, such as social norms, to bring about long-term behaviour change. This should be seen as part of a broader strategy, including policy and environmental change. Evaluation designs that measure the full range of variables are preferred to an over-concentration on behaviour alone. 相似文献
85.
Objective: To develop an explicit scheme for calculating a 5‐star quality rating for consumer health information, and to test if there is good agreement be tween this and the final DISCERN quality question. Design: A sample of 15 consumers and health professionals rated 26 health information leaflets covering a broad range of conditions and treatments using two new 5‐star‐rating schemes and the existing DISCERN final quality rating. Each scheme is based on the 15 DISCERN criteria, but the 5‐star schemes provide more explicit methods for summarizing overall quality. The level of agreement between the three different rating systems was compared using Kappa scores with quadratic weights. Participants were also asked to complete a brief questionnaire that was designed to elicit their views on using a visual summary of the quality of health information. Results: The level of agreement between each 5‐star‐rating system and the existing DISCERN quality rating question was high (kappa = 0.86, 95% CI 0.83–0.89 in both instances). Seventy‐seven per cent of the sample preferred the second star‐rating scheme, and 80% reported they would use such a scheme. Conclusion: Assigning a single quality score using an explicit scoring scheme (represented by stars) based on answers to the DISCERN questionnaire is a reliable and valid way of rating consumer health information. 相似文献
86.
87.
Wagner-Egger P Bangerter A Gilles I Green E Rigaud D Krings F Staerklé C Clémence A 《Public understanding of science (Bristol, England)》2011,20(4):461-476
Lay perceptions of collectives (e.g., groups, organizations, countries) implicated in the 2009 H1N1 outbreak were studied. Collectives serve symbolic functions to help laypersons make sense of the uncertainty involved in a disease outbreak. We argue that lay representations are dramatized, featuring characters like heroes, villains and victims. In interviews conducted soon after the outbreak, 47 Swiss respondents discussed the risk posed by H1N1, its origins and effects, and protective measures. Countries were the most frequent collectives mentioned. Poor, underdeveloped countries were depicted as victims, albeit ambivalently, as they were viewed as partly responsible for their own plight. Experts (physicians, researchers) and political and health authorities were depicted as heroes. Two villains emerged: the media (viewed as fear mongering or as a puppet serving powerful interests) and private corporations (e.g., the pharmaceutical industry). Laypersons' framing of disease threat diverges substantially from official perspectives. 相似文献
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