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941.
This study investigated the component skills underlying reading fluency in a heterogeneous sample of 527 eighth grade students.
Based on a hypothetical measurement model and successive testing of nested models, structural equation modeling revealed that
naming speed, decoding, and language were uniquely associated with reading fluency. These findings suggest that the ability
to access and retrieve phonological information from long-term storage is the most important factor in explaining individual
differences in reading fluency among adolescent readers. The ability to process meaning and decode novel words was smaller
but reliable contributors to reading fluency in adolescent readers. 相似文献
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Three samples of Creatine Serum ATP Advantage from Muscle Marketing USA, Inc. were assayed for creatine by two different techniques by four independent laboratories, and for creatinine by two different techniques by two laboratories. A further sample was assayed for phosphorylcreatine. Dry weight and total nitrogen were also analysed. Six male volunteers ingested in random order, over 3 weeks: (A) water; (B) 2.5 g creatine monohydrate (Cr.H2O) in solution; and (C) 5 ml Creatine Serum (reportedly containing an equivalent amount of Cr.H2O). Blood samples were collected before and up to 8 h after each treatment and plasma was analysed for creatine and creatinine. Eight-hour urine samples were analysed for creatine. Ingestion of 2.5 g creatine monohydrate in solution resulted in a significant increase in plasma creatine (from 59.1+/-11.8 micromol.l(-1) to 245.3+/-74.6 microM micromol.l(-1); mean+/-s) and urinary creatine excretion. No increase in plasma or urinary creatine or creatinine was found on ingestion of Creatine Serum or water. Analysis showed 5 ml of Creatine Serum to contain <10 mg Cr.H2O and approximately 90 mg creatinine. Phosphorylcreatine was not detectable and only a trace amount of phosphorous was present. Total nitrogen analysis ruled out significant amounts of other forms of creatine. We conclude that the trace amounts of creatine in the product would be too little to affect the muscle content even with multiple dosing. 相似文献
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The purpose of this study was to examine associations of fundamental movement skills (FMS) with measures of body composition among children and adolescents. Secondary analyses of cross-sectional data collected from 4,363 children and adolescents in Grades 4, 6, 8, and 10 as part of the 1997 New South Wales Schools Fitness and Physical Activity Survey were conducted. Six FMS (run, vertical jump, throw, catch, kick, and strike) were assessed by observation. Height and weight (used to calculate body mass index; BMI) and waist circumference were directly measured. Results indicated that the children's and adolescents' ability to perform FMS was significantly related to BMI and waist circumference. Specifically, BMI and waist circumference were significant predictors for FMS in six of the eight demographic groups. Adjusted odds ratios revealed that overweight boys and girls in all grades were less likely to possess high levels of FMS and more likely to possess low levels of FMS than those who weren't overweight. When FMS were partitioned into locomotor and object-control skills, nonoverweight boys and girls in each grade were two to three times more likely to possess more advanced locomotor skills than overweight boys and girls. However, for object-control skills, the only demographic groups in which nonoverweight students possessed a greater number of advanced skills than overweight students were boys in Grades 6 and 10. There appear to be significant and important associations between performance of locomotor skills and weight status among children and adolescents. This would suggest that intervention strategies to prevent unhealthy weight gain among children and youth might usefully include increasing proficiency of locomotor skills as a key component. 相似文献
945.
The changes in the global information landscape, as epitomized by the reaction of governments to the 9/11 attacks, resulted in legislation, policy, and the formation of agencies that have affected many issues related to information and its use. This article examines the recent multiplicity of challenges that affect citizens' control and use of information. In the name of the war on terror, greater national security, and globalization trends, information laws, and policies often go further than is necessary and impact on the information rights of citizens. In this article, we advocate for bringing together what are at times disparate information issues under one label, namely, “information rights” (which include privacy, freedom of expression, access, etc.). Information rights are apprehended from a user-centered perspective (i.e., users as citizens, not just consumers). They cover many different aspects of the information life cycle and the roles and responsibilities of individuals and communities. Such an approach provides an alternative way of framing current information issues as they relate to national security policies and civil liberties in the broader sense. 相似文献
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