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91.
92.
    
Abstract

The purpose of this study was to determine the effects of training change-of-direction speed and small-sided games on performance in the Planned-AFL agility test and reactive agility. Twenty-five elite-standard U-18 Australian Rules football players were randomly allocated either to a change-of-direction group or a small-sided games group. Players participated in one or two 15-min sessions per week with 11 sessions conducted over a 7-week period during the season. Tests conducted immediately before and after the training period included the Planned-AFL agility test and a video-based reactive agility test specific to Australian Rules football. The reactive agility test variables were total time, decision time and movement response time. The small-sided games group improved total time (P = 0.008, effect size = 0.93), which was entirely attributable to a very large reduction in decision time (P < 0.001, effect size = 2.32). Small-sided games produced a trivial change in movement response time as well as in the Planned-AFL agility test (P > 0.05). The change-of-direction training produced small to trivial changes in all of the test variables (P > 0.05, effect size = 0–0.2). The results suggest that small-sided games improve agility performance by enhancing the speed of decision-making rather than movement speed. The change-of-direction training was not effective for developing either change-of-direction speed as measured by the Planned-AFL test or reactive agility.  相似文献   
93.
Educational technology research and development - Materialist design is presented as an embodied perspective on educational design that can be applied to redesign of classroom-based learning...  相似文献   
94.
The financial problems of colleges under 1,000 in enrollment cannot be blamed entirely on a set of minimum, or fixed, costs that colleges of any size must bear. Enrollment fluctuations and lower tuitions also contribute to financial difficulties. In the past, colleges have used growth not so much to capitalize on economies of scale as to provide evidence of success to their constituents. As a result, the ranks of small colleges remain populated with those institutions experiencing financial difficulty, while more successful institutions have attained a larger size. However, in an era of limited growth potential, small colleges must not look to growth as a symbol of success. Success will be better equated with the continuation of quality academic programs in a closely knit community.  相似文献   
95.
The study of social reticence in early childhood has focused primarily on those dispositional, intra-individual factors that might account for its demonstration among peers. Little is known, however, about the relations between social reticence and its association with the quality of parenting behaviors. Indeed, the independent and interactive “contributions” of dispositional and parenting factors to children's demonstration of socially reticent behavior have not received adequate attention. In this study, 188 preschool children and their mothers were observed during unstructured Free-play and a structured Lego-building teaching task. Additionally, the children were observed in quartets of same-sex, same-age unfamiliar peers. Results indicated that children's shy, socially reticent behavior was predicted by the extent to which mothers were over-solicitous during Free-play. In addition, preschooler's expressions of reticent behavior were predicted by the interactions between emotion dysregulation and the lack of maternal guidance and control during a teaching task. Emotionally dysregulated children whose mothers provided little control in this putatively stressful teaching task were more likely to be shy and reticent. This relation was non-significant for dysregulated children with mothers who provided high levels of guidance. The results suggest that early childhood educators offer reticent/shy children opportunities to explore their impersonal and social milieus and to warmly encourage such exploratory activities. Without such encouragement and opportunity building, reticent preschoolers may suffer from not having experienced sufficient exploration-to-play sequences thereby stifling the problem-solving competencies derived from such experiences.  相似文献   
96.
    
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97.
The schools of the minor professions   总被引:2,自引:0,他引:2  
Nathan Glazer 《Minerva》1974,12(3):346-364
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98.
    
Memory for former preschool classmates was examined in 9-and 10-year-old children using measures of both explicit and implicit memory. Yes-no recognition of faces was at low levels but was significantly above chance. Skin conductance data showed similarly low but above-chance differentiation between classmates and controls. A median split of children based on their recognition memory scores showed that children with little evidence of explicit memory for classmates were as likely to show differential skin conductance responding to faces of former classmates as were children with higher recognition scores. Infantile amnesia, like the clinical syndrome for which it is named, may not always involve complete loss of encoded information.  相似文献   
99.
    
This study examined whether conformity to high- but not low-status e-confederates was associated with increases in identification with popular peers and subsequent increases in self-esteem. A sample of 250 adolescents (55.1% male; Mage = 12.70 years; 40.3% White, 28.2% Black, 23.4% Hispanic/Latino, and 7.7% multiracial/other) participated in a well-established experimental chat room paradigm where they were exposed to norms communicated by high- and low-status e-confederates. Results revealed that for boys in the high-status condition only, but not girls, the positive relation between conformity and self-esteem was mediated by greater response alignment with popular peers. These findings bolster prior research by suggesting that conformity to popular peers may be partly motivated by drives for self-esteem and alignment with a valued reference group.  相似文献   
100.
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