Antioxidant-rich beetroot juice does not adversely affect acute neuromuscular adaptation following eccentric exercise     

Tom Clifford  Oliver Bell  Daniel J. West  Glyn Howatson  Emma J. Stevenson 《Journal of sports sciences》2017,35(8):812-819

This study examined the effects of beetroot juice on the repeated bout effect (RBE) to eccentric exercise. Twenty-nine recreationally active males performed two bouts of 100-drop jumps, separated by 14–21 days. Using a double-blind, independent groups design, participants consumed either a higher dose beetroot juice (H-BT; 250 ml, n = 10), a lower dose beetroot juice (L-BT; 125 ml, n = 9) or an isocaloric placebo (PLA; 250 ml, n = 10) for 3 days after bout 1; no drinks were consumed after bout 2. Maximal isometric voluntary contraction (MIVC), countermovement jump (CMJ), pressure-pain threshold (PPT) and creatine kinase (CK) were measured pre, post, 24, 48 and 72 h following both bouts. In bout 2, CMJ and MIVC recovered quicker and CK activity was attenuated (versus bout 1) (P < 0.05) in all groups, demonstrating an RBE. At 24 h post bout 1, MIVC was 84.1 ± 16.1, 83.6 ± 11.6, 79.7 ± 15.1% relative to baseline values in the H-BT, L-BT and PLA groups, respectively; at 24 h post bout 2, MIVC recovered to 90.7 ± 13.7, 92.9 ± 6.9, 87.8 ± 6.9, in the H-BT, L-BT and PLA groups, respectively. These findings suggest that supplementation with antioxidant-rich beetroot juice does not adversely affect acute adaptations to a bout of eccentric exercise.  相似文献   

关于课程哲学基础的思考   总被引：4，自引：0，他引：4  

谭辉旭 《教育研究》2006,27(3):66-70

课程与哲学的关系十分密切,一方面,哲学制约着课程观的产生、发展和变革;另一方面,课程在哲学面前具有能动性、选择性。把马克思主义实践哲学应用于课程研究,作为课程论的哲学基础,满足课程发展的要求,建立实践课程论,这是课程理论和实践发展的必然。用实践哲学审视课程历史,探究课程本质,反思课程问题,把握课程规律及其特点,是实践课程论应研究的主要问题。  相似文献   

When the staff take part     

W.A. Grace M.A. 《British Journal of Religious Education》1934,1(3):145-150

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1991 Survey: State Regulation of Geological,Paleontological, and Archaeological Collecting     

Robert M. West 《Curator: The Museum Journal》1991,34(3):199-209

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Mobile learning for early reading in Cambodia     

Oakley  Grace  Pegrum  Mark  Kheang  Thida  Seng  Krisna 《Education and Information Technologies》2022,27(2):1467-1487

Education and Information Technologies - This paper reports on a mixed-methods study of the Total Reading Approach for Children Plus (TRAC+) program, with a particular focus on its mobile learning...  相似文献   

Learning analytics application to examine validity and generalizability of game-based assessment for spatial reasoning     

Yoon Jeon Kim  Mariah A. Knowles  Jennifer Scianna  Grace Lin  José A. Ruipérez-Valiente 《British journal of educational technology : journal of the Council for Educational Technology》2023,54(1):355-372

Game-based assessment (GBA), a specific application of games for learning, has been recognized as an alternative form of assessment. While there is a substantive body of literature that supports the educational benefits of GBA, limited work investigates the validity and generalizability of such systems. In this paper, we describe applications of learning analytics methods to provide evidence for psychometric qualities of a digital GBA called Shadowspect, particularly to what extent Shadowspect is a robust assessment tool for middle school students' spatial reasoning skills. Our findings indicate that Shadowspect is a valid assessment for spatial reasoning skills, and it has comparable precision for both male and female students. In addition, students' enjoyment of the game is positively related to their overall competency as measured by the game regardless of the level of their existing spatial reasoning skills.

Practitioner notes

What is already known about this topic:

• Digital games can be a powerful context to support and assess student learning.
• Games as assessments need to meet certain psychometric qualities such as validity and generalizability.
• Learning analytics provide useful ways to establish assessment models for educational games, as well as to investigate their psychometric qualities.

What this paper adds:

• How a digital game can be coupled with learning analytics practices to assess spatial reasoning skills.
• How to evaluate psychometric qualities of game-based assessment using learning analytics techniques.
• Investigation of validity and generalizability of game-based assessment for spatial reasoning skills and the interplay of the game-based assessment with enjoyment.

Implications for practice and/or policy:

• Game-based assessments that incorporate learning analytics can be used as an alternative to pencil-and-paper tests to measure cognitive skills such as spatial reasoning.
• More training and assessment of spatial reasoning embedded in games can motivate students who might not be on the STEM tracks, thus broadening participation in STEM.
• Game-based learning and assessment researchers should consider possible factors that affect how certain populations of students enjoy educational games, so it does not further marginalize specific student populations.

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Oral discourse skills: Dimensionality of comprehension and retell of narrative and expository texts,and the relations of language and cognitive skills to identified dimensions     

Young-Suk Grace Kim 《Child development》2023,94(5):e246-e263

We examined the dimensionality of oral discourse skills (comprehension and retell of texts) and the relations of language and cognitive skills to the identified dimensions. Data were from 529 English-speaking second graders (M_age = 7.42; 46% female; 52.6% Whites, 33.8% African Americans, 4.9% Hispanics, 4.7% two or more races, .8% Asian Americans, .6% American Indians, .2% Native Hawaiians, 2.5% unknown; data from 2014–2015 to 2016–2017). Confirmatory factor analysis revealed that oral discourse skills are best described as four related but dissociable dimensions of narrative comprehension, narrative retell, expository comprehension, and expository retell (rs = .59–.84). Language and cognitive skills had different patterns of relations to the identified dimensions and explained larger amounts of variance in comprehension than in retell.  相似文献