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Antje Dresen PhD Mischa Kläber PhD Dipl.-Sportwiss. Pavel Dietz PhD 《Sportwissenschaft》2014,44(3):153-159
The use of physical performance-enhancing drugs is not limited to professional sports only, but has also been reported as common practice in recreational sports. A significant amount of epidemiological studies have highlighted the collective of fitness center visitors to be a high-risk group for using performance-enhancing drugs. From a sociological perspective, however, the decision to use performance-enhancing drugs (e.g., doping in the context of high-performance sport) is not an individual phenomenon only, but rather a result of social opportunity structures. This research article gives insight into enhancing-related Internet forums, in which the expertise of using and applying substances is passed on step by step. Using selected criminological learning theories, the “doping talk” in these social networks is hermeneutically reanalyzed and the Internet is exposed as a previously under-analyzed option for acquiring knowledge on the use of performance-enhancing drugs. This article shows that users of “doping platforms” are highly informed about doping and this offer of information acts like a knock-on effect to athletes who have so far abstained from doping. Consequently, future prevention models against the abuse of performance-enhancing drugs should consider the subcultural background of the milieu in which the athletes act. 相似文献
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The aim of this study was to evaluate physiological and technical attributes of prepubertal soccer players during multiple small-sided games (SSGs), and determine if SSGs can act as a talent identification tool. Sixteen highly trained U10 soccer players participated and separated into two groups of eight. Each group played six small-sided (4 vs. 4) matches of 5-min duration. Each player was awarded total points for the match result and goals scored. A game technical scoring chart was used to rate each player’s performance during each game. Time-motion characteristics were measured using micromechanical devices. Total points had a very large significant relationship with game technical scoring chart (r = 0.758, P < 0.001). High-speed running distance had a significantly large correlation with game technical scoring chart (r = 0.547, P < 0.05). Total distance covered had a significant and moderate correlation with game technical scoring chart (r = 0.545, P < 0.05) and total points (r = 0.438, P < 0.05). The results demonstrated a large agreement between the highest-rated players and success in multiple SSGs, possibly due to higher-rated players covering larger distances in total and at high speed. Consequently, multiple SSG could be used to identify the more talented prepubertal soccer players. 相似文献
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When teachers or instructors create computer-based learning environments, they often solely consider technical aspects of interactivity. As a consequence, learners’ main role is to respond to requests of the learning environment (e.g. by answering multiple-choice questions). This aspect of interactivity is, however, not sufficient to understand the complex benefits of interactivity for learners’ knowledge acquisition. In order to create a higher level of interactivity, an instructional task that encourages learners to design learning materials for fellow learners is used in this paper. We will show that this instructional task can induce interactive elements because learners are encouraged to take not only their own perspective into account when designing. In addition, we investigated if the quality of source material affects knowledge acquisition in design tasks. In a two-by-two design, students (n?=?108) had to design either a learning environment for others (i.e. to perform perspective-shifting), or a representation of acquired knowledge for themselves (no perspective-shifting) with less or more coherent information sources. Results indicate that performing perspective-shifting can be a powerful technique for eliciting interactive learning behavior and, thus, for learning. The quality of information sources does not influence knowledge acquisition to a great extent. 相似文献
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In the course of educational expansion, student populations have become more diverse. This paper represents an international literature review on the topic of first-generation students (FGS), i.e. students whose parents have not obtained a higher education qualification. On the basis of more than 70 research articles and reports on FGS from several countries, we find that the focal points in FGS research concern their pre-college characteristics, mobility factors, decisions about institution, degree and subjects, FGS’ experiences at university, and academic outcomes. Summarising the state of research on these topics, we point to two problems: (1) the international incommensurability of data on FGS due to differences in how FGS are defined and researched; (2) the depiction of FGS’ problems as individual rather than structural problems. We recommend that structural changes such as making organisational structures in higher education institutions more transparent are in order instead of offering special support programmes only for FGS. 相似文献
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Teacher Perceptions of Teacher Assessment 总被引：1，自引：1，他引：0
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Gregor Damnik Antje Proske Susanne Narciss Hermann Körndle 《The Journal of educational research》2013,106(6):431-440
ABSTRACT Especially in the context of technology-enhanced informal learning, it is crucial to understand how to design information sources in such a way that learners are not overwhelmed by the demands of the learning process, but at the same time are engaged in higher order thinking processes. Guidance aids learners in dealing with the demands of a learning process. The authors examined the effects of different levels of guidance provided by an information source. To this end, the effects of a preconstructed externalization are compared to a self-constructed externalization. Thirty-eight students participated in the study. The results revealed no significant differences between the groups with respect to posttest retention. However, performance in application tasks was promoted by the condition associated with a lower level of guidance. This suggests that having learners self-construct an externalization might be a suitable means to elicit learners’ higher order thinking processes in technology-enhanced informal learning. 相似文献
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Research Findings: Behavior regulation, including paying attention, remembering instructions, and controlling action, contributes to children's successful adaptation to and functioning in preschool and school settings. This study examined the development of behavior regulation in early childhood and its potential contribution to individual differences in children's early knowledge (mathematics and vocabulary). Sixty German preschool children were administered a direct observational measure of behavior regulation, the Head-to-Toes Task, and a standardized test to assess early mathematics and vocabulary. Results revealed significant gains in behavior regulation between of 3 and 4 years of age. Moreover, early gender differences were found, with girls outperforming boys at age 4. Behavior regulation was significantly related to performance on the academic tasks, but the pathways to math and vocabulary knowledge differed. Practice or Policy: Discussion focuses on the role of behavior regulation in early academic achievement. 相似文献