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971.
Kollmer Julia Schleinschok Katrin Scheiter Katharina Eitel Alexander 《Instructional Science》2020,48(5):569-589
Instructional Science - In this study, we investigated whether drawing after learning supports metacognitive monitoring especially when students are supported in their drawing efforts. Therefore,... 相似文献
972.
Weitkunat T Knechtle B Knechtle P Rüst CA Rosemann T 《Journal of sports sciences》2012,30(10):1003-1013
Body mass changes during ultra-endurance performances have been described for running, cycling and for swimming in a heated pool. The present field study of 20 male and 11 female open-water swimmers investigated the changes in body composition and hydration status during an ultra-endurance event. Body mass, both estimated fat mass and skeletal muscle mass, haematocrit, plasma sodium concentration ([Na+]) and urine specific gravity were determined. Energy intake, energy expenditure and fluid intake were estimated. Males experienced significant reductions in body mass (-0.5 %) and skeletal muscle mass (-1.1 %) (P < 0.05) during the race compared to females who showed no significant changes with regard to these variables (P > 0.05). Changes in percent body fat, fat mass, and fat-free mass were heterogeneous and did not reach statistical significance (P > 0.05) between gender groups. Fluid intake relative to plasma volume was higher in females than in males during the ultra-endurance event. Compared to males, females' average increase in haematocrit was 3.3 percentage points (pp) higher, urine specific gravity decrease 0.1 pp smaller, and plasma [Na+] 1.3 pp higher. The observed patterns of fluid intake, changes in plasma volume, urine specific gravity, and plasma [Na+] suggest that, particularly in females, a combination of fluid shift from blood vessels to interstitial tissue, facilitated by skeletal muscle damage, as well as exercise-associated hyponatremia had occurred. To summarise, changes in body composition and hydration status are different in male compared to female open-water ultra-endurance swimmers. 相似文献
973.
Alexander H.K. Montoye Joe Mitrzyk 《Measurement in physical education and exercise science》2019,23(2):99-109
Introduction: Wearable activity monitors have been developed for jump height assessment, but the Blast Athletic Performance monitor has not yet been validated, and it remains unclear if the Blast can track changes across a sports season. Methods: Collegiate women’s volleyball players (n = 20) wore the Blast monitor (waistband) while performing standing vertical jumps (SVJs) and one-step vertical jumps (OSJs) weekly during and after a 9-week season. Jump heights from the Blast were compared to a Vertec (criterion). Results: Correlations of Blast and Vertec were moderately high (r = 0.67–0.69), but the Blast underestimated SVJ and OSJ (9.2–10.0 cm), with mean absolute percent errors 19.8–21.0%. A + 23% correction factor reduced errors to 10.5–11.3%. The Blast did not detect small decreases (2–4 cm) in criterion-measured jump height in the postseason. Conclusion: The Blast underestimated jump height and had limited ability to detect changes of up to 5.0 cm following a volleyball season. A relative correction lowered, but did not eliminate, measurement error. 相似文献
974.
Michael B. Adinortey Ben A. Gyan Jonathan P. Adjimani Philomena E. Nyarko Charity Sarpong Francis Y. Tsikata Alexander K. Nyarko 《Indian journal of clinical biochemistry : IJCB》2011,26(4):366-372
There is scanty information on the role of genetic factors, especially those relating to haptoglobin (Hp) phenotypes in the
expression of complications among diabetes mellitus patients in Ghana. In this study, we investigated whether there is any
association between Hp phenotypes and diabetic complications and to determine if association of the Hp phenotypes with diabetic
complications in Ghanaian diabetics differ from those in Caucasians. A total of 398 participants were randomly recruited into
the study. These comprised diabetic patients numbering 290 attending a diabetes Clinic in Ghana and 108 non-diabetic controls
from the same community. Analyses of the results indicate that most of the diabetics with complications were of the Hp 2–2
(35%) and Hp 2–1 (23.9%) phenotypes. Fewer diabetics were found to be of the Hp 2–1 M phenotype. The controls were mostly
of Hp 1–1 and Hp 2–1 M phenotypes. The odds ratio of having complications in a diabetic with an Hp 2–2 phenotype was 18.27
times greater than that for Hp 0–0. Hp 2–2 phenotype with its poor antioxidant activity may therefore be a useful predictor
for the propensity of an individual to develop diabetes complications. 相似文献
975.
Purpose:The present study aimed to examine the link between physical activity(PA)and life satisfaction in a large international study of adolescents.We also aimed to test whether overweight and underweight perceptions act as mediators and whether age and sex acted as moderators.Methods:For this purpose,we analyzed data from the Health Behavior in School-aged Children study,which comprises 727,865 observations from 44 nations at 4 measurement occasions.Results:Multilevel analyses revealed a positive link between PA and life satisfaction.In addition,underweight and overweight perceptions mediated the effect of PA on life satisfaction.We further found that age and sex acted as moderators.In older adolescents,stronger effects were found in the links between PA and life satisfaction,PA and overweight perception,and both weight perceptions and life satisfaction.In addition,in female adolescents,the link between overweight perception and life satisfaction was stronger.Conversely,the links between PA and both weight perceptions were stronger for boys.Conclusion:The results suggest that weight perception explains part of the relationship between PA and life satisfaction in adolescents and that these effects vary as a function of age and sex. 相似文献
976.
977.
Deirdre Dlugonski Aaron P. Wood Katrina D. DuBose Patrick Rider Alexander M. Schoemann 《Measurement in physical education and exercise science》2013,17(3):272-279
ABSTRACTIntroduction: This study examined the concurrent validity and inter-pair reliability of the proximity detection function on Bluetooth-enabled accelerometers across manufacturer-specified ranges. If valid, this method could be used for objectively measuring shared physical activity participation. Method: Thirty-six dyads aged 21.6 (2.1) years wore two sets of Bluetooth-enabled accelerometers initialized as beacons and receivers to compare accelerometer-measured proximity detection to direct observation under 11 different controlled and free-living conditions. Results: The proportion of minutes in which proximity was detected differed across conditions (p < .001), with the highest proportions in the controlled conditions (.77–1.0). Among the free-living conditions, the different room (.73 ± .20) condition had the highest proximity detection proportions. There were no differences in the proximity detection across accelerometer pairs (p = .265). Conclusion: Proximity detection with Bluetooth-enabled accelerometers was reliable and had the highest detection rates under the controlled treadmill walking conditions. Despite limitations, using Bluetooth-enabled accelerometers is a promising approach for measuring shared physical activity. 相似文献
978.
979.
Linda A. Reddy Christopher M. Dudek Stephanie Peters Alexander Alperin Ryan J. Kettler Alexander Kurz 《Educational Assessment, Evaluation and Accountability》2018,30(1):47-70
This study examined attitudes and beliefs regarding teacher evaluation of teachers and their school administrators in the state of New Jersey, USA. The sample included 33 school administrators and 583 Pre-K through 12th grade teachers from four high-poverty urban school districts (22 schools). Participant attitudes and beliefs were assessed using the Teacher Evaluation Experience Scale (TEES; Reddy et al. in Educational Assessment, 21(2), 120–134, 2016). TEES is a multi-informant assessment designed to measure teachers’ and school administrators’ experiences with teacher evaluation through five scales (i.e., total and subscales of system, feedback, process, and motivation to change) and six open-ended questions. Based on the qualitative analyses, teachers identified collaborative communication and evaluation feedback as the most helpful aspects of their evaluation process. Based on the quantitative analyses, however, their average ratings did not exceed neutral on any of the four subscales. Overall findings suggest that school administrators’ experiences with teacher evaluation are more favorable than teachers’ experiences. Moderate correlations are found between participant characteristics and TEES scales. Implications for teacher evaluation are presented. 相似文献
980.
Maria Cseh Alexandre Ardichvili Alexander Gasparishvili Bla Krisztin Zsolt Nemeskeri 《Performance Improvement Quarterly》2004,17(2):5-27
This survey‐based study compared socio‐cultural values and perceptions of organizational culture characteristics held by more than 3,300 managers and employees in twelve business organizations in Hungary, Russia, Georgia, Kazakhstan, and the Kyrgyz Republic. Significant differences were found between the five countries on all socio‐cultural and organizational culture dimensions. The relationship between socio‐cultural values and the organizational culture perceptions was only moderately significant. The paper concludes with implications for professionals seeking to enhance organizations' performance in these countries and suggestions for further research. 相似文献