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41.
Der Begriff des informellen Lernens wird hier auf den Wissenserwerb im Rahmen der allt?glichen Nutzung von Massenmedien bezogen. Bei der genaueren Betrachtung des Mediennutzungsverhaltens von verschiedenen Altersgruppen erweisen sich sozio-kulturelle Unterschiede als wichtige Pr?diktoren für Mediennutzung und -rezeption. Das Konzept der sozialen Milieus eignet sich zur Analyse sozio-kultureller Differenzen, auch mit Blick auf die Medienbildung. Bei Kindern scheint das Herkunftsmilieu der Eltern einen zentralen Einfluss auf deren Medienbildung zu haben, w?hrend im Jugendalter auch jugendkulturelle Rahmungen bedeutsam werden. Medienrezeption wird dabei nicht als einseitiger Prozess, sondern als kommunikative Interaktion zwischen Medienproduzenten und Medienkonsumenten verstanden. Letztere bringen in der Wahl von Medien, Genres und Rezeptionskontexten auch ?sthetische Pr?ferenzen und ihren sozio-kulturellen Habitus zum Ausdruck.  相似文献   
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This study identifies personal characteristics which distinguish university students who conform to living group norms in complaints of physical symptoms from those who do not. Discriminant function analyses indicated significant differences between these two groups of students, and between males and females. For example, low-symptom females living in high-symptom living groups who did not themselves increase in symptoms (environmental resisters) were higher in dominance and religious concern and lower in social participation than those who increased in symptoms. For males, important discriminators between conformers and resisters were academic achievement and alcohol consumption. Further specification of psychological variables which relate to the degree of conformity or resistance to environmental influence is central to understanding the impact of educational settings such as student living groups and classrooms.  相似文献   
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Objective: To investigate the distributions of human leukocyte antigen (HLA)-A and-B alleles and HLA-A-B haplotypes in the Yi ethnic minority of the Yunnan Province, situated in southwestern China. Methods: DNA typing for HLA-A and-B loci was performed using the polymerase chain reaction-sequence-based typing (PCR-SBT) method on 114 randomly selected healthy individuals of the Yi population. The allelic frequencies of HLA-A and-B loci were calculated by direct counting and HLA-A-B haplotypes were estimated ...  相似文献   
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The present study was designed to fill a gap in the literature on attentional focus and sports performance. Specifically, in contrast to most previous studies in which an external focus was directed at an implement, we used a gymnastics skill that did not involve the use of an implement. Furthermore, while most studies used only outcome measures of performance, we also assessed movement quality. Twelve-year-old gymnasts performed a maximum vertical jump with a 180-degree turn while airborne, with their hands crossing in front of their chest during the turn under three different focus conditions. Under the external focus condition, participants were asked to focus on the direction in which a tape marker, which was attached to their chest, was pointing after the turn. Under the internal focus condition, they were asked to focus on the direction in which their hands were pointing after the turn. Under the control condition, no focus instructions were given. The external focus condition resulted in both superior movement form and greater jump height than did the other two conditions, which produced comparable results. The present findings show that, similar to other tasks, the performance of form-based skills can be enhanced relatively easily by appropriate external focus instructions.  相似文献   
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ABSTRACT

The aim of this study was to propose a group of parameters able to quantify not only arm coordination but also inter limb coordination. These include the well know index of coordination with the relative duration of the stroke phases and two new parameters: the Index of synchronization (Ids) between arms and legs actions; and the Index of inter limb coordination (IdIC) calculated as the relative foot position during successive arm stroke phases. These parameters were compared between experts and amateur swimmers in a maximal front crawl sprint. The influence of arm stroke in leg kick parameters was also assessed, comparing the full stroke condition with a condition without arms actions. Sixty-five per cent of expert swimmers used synchronized limb actions while 95% of amateur swimmers used non-synchronized limb motions. These synchronized expert swimmers also converged towards a specific coordination pattern between foot position and arm stroke phases. In the condition without arms, both groups changed kick rate and amplitude. The present study reveals the interdependency of arms and legs actions and the importance of coordination and synchronization between limbs. Therefore, the proposed group of overall indexes of coordination provides a more complete marker for the analysis of swimming technique.  相似文献   
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