The effect of glycaemic index of high carbohydrate diets consumed over 5 days on exercise energy metabolism and running capacity in males     

Sareena Hamzah  Siobhan Higgins  Tamara Abraham  Paul Taylor  Daiva Vizbaraite 《Journal of sports sciences》2013,31(14):1545-1554

Abstract

The aim of this study was to determine whether rates of total fat and carbohydrate oxidation and endurance capacity during running conducted in the fasted state are influenced by the glycaemic index (GI) of high carbohydrate diets consumed over 5 days. Nine healthy males performed three treadmill runs to exhaustion at 65% of maximum oxygen uptake ([Vdot]O_2max): after a habitual diet (control trial), after 5 days on a high carbohydrate/high glycaemic index diet, and after 5 days on a high carbohydrate/low glycaemic index diet in randomized counterbalanced order. No significant differences in rates of fat and carbohydrate oxidation, concentrations of plasma insulin, glucose, non-esterified fatty acids and glycerol, or time to exhaustion were observed between the high carbohydrate/high glycaemic index and high carbohydrate/low glycaemic index trials. Compared with the control trial, the concentration of plasma glycerol and rate of fat oxidation were lower (P < 0.05) and the rate of carbohydrate oxidation higher (P < 0.05) in both the high carbohydrate/high glycaemic index diet and high carbohydrate/low glycaemic index trials during the run to exhaustion. In conclusion, the extent by which a high carbohydrate diet consumed over 5 days reduces rate of fat oxidation during subsequent running exercise in the fasted state is not influenced by the glycaemic index of the diet.  相似文献   

Children's school readiness in the ECLS-K: Predictions to academic, health, and social outcomes in first grade     

Elizabeth Hair  Tamara Halle  Elizabeth Terry-Humen  Bridget Lavelle  Julia Calkins 《Early childhood research quarterly》2006,21(4):431-454

Two studies examine patterns of school readiness in children at school entry and how these patterns predict first-grade outcomes in a nationally representative sample of first-time kindergartners from the Early Childhood Longitudinal Study—Kindergarten Class of 1998–1999 (N = 17,219). In Study 1, cluster analyses revealed four profiles at kindergarten entry: comprehensive positive development (30%), social/emotional and health strengths (34%), social/emotional risk (13%), and health risk (22.5% of the sample). Study 2 results suggested that children with one of the two “risk” profiles were more likely to be from families with multiple socioeconomic disadvantages. In addition, all four profiles differentially predicted academic and social adjustment in early elementary school. Children with a risk profile performed the worst on all outcomes; children with a comprehensive positive development profile performed the best. The authors discuss the need for early identification of children who may be at risk for entering school with few school readiness strengths.  相似文献   

A technology crisis facing minority students     

Tamara Pearson 《TechTrends》2002,46(2):15-20

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Making the Hidden Explicit: Learning About Equity in K-8 Preservice Science Education     

Tamara Holmlund Nelson 《Journal of Science Teacher Education》2008,19(3):235-254

Preservice teachers in a K–8 science methods course used guided video reflection to examine their interactions with children during science teaching. This inquiry approach helped preservice teachers identify and respond to gaps between their beliefs and intentions about teaching all children and their enactment of those beliefs. The experience of teaching a science lesson and then viewing it multiple times through a critical framework provided an opportunity for preservice teachers to recognize hidden assumptions, unexamined behaviors, and the unintentional meanings they may have conveyed to children. This encouraged them to think more critically about their roles as teachers in creating spaces where all children have access to quality science learning experiences.

Tamara Holmlund NelsonEmail:

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The assessment of teaching in higher education: A critical retrospect and a proposal     

Henry C. Johnson Jr.  Dent M. Rhodes  Robert E. Rumery 《Higher Education》1975,4(2):173-199

Evaluation of college and university teaching is considered in the context of growing demands for accountability of educational institutions and particular roles of faculty in achieving goals for which these institutions are believed to be accountable. In the first of two papers,^* three contemporary aprroaches to evaluation of teaching in higher education are critically reviewed. All three of these approaches-assessment of learning outcomes, assessment of teacher characteristics and analysis of pedagogical behaviors-are found to be defective on logical, theoretical and empirical grounds. A common thread of deficiency is the absence of a coherent theoretical framework for analysis of teaching and phenomena associated with teaching. Specific defecs are analyzed in each of the three approaches as well as in the ubiquitous methodology of rating of teaching performance. In analysis of evaluation by assessment of learning outcomes, teaching is shown to be neither necessary nor sufficient to subsequent learning outcomes. Assessment of teacher characteristics fails to identify those characteristics peculiarly indigenous to teaching as a generic activity. Analysis of pedagogical behaviors fails to distinguish critical teaching acts from more general teacher characteristics interpretable in terms of teacher personality. Furthermore, no adequate basis is provided for normative interpretation of data pertaining to pedagogical behaviors. The use of rating scales to provide data about teacher characteristics or pedagogical behavior rests on assumed rather than demonstrated validity of results. Evidence of validity or meaningfulness is replaced by evidence of consistency which is often spurious. The first paper concludes with an outline of requirements for a more constructive approach to the task of teacher evaluation. In a second paper, an outline of a theory of teaching is sketched which conforms to these requirements. Realization of this theoretical structure in teaching assessment report forms is described. Tentative conclusions from trial use of forms-in-development and recommendations for additional data sources are discussed in terms of their potential contribution to improvement in teaching.  相似文献   

Interest Assessment and the Content Area Literacy Environment: Challenges for Research and Practice   总被引：3，自引：0，他引：3  

Tamara L. Jetton  Patricia A. Alexander 《Educational Psychology Review》2001,13(3):303-318

Through our exploration of the assessment of interest, we highlight 5 issues that emerge in the effort to assess interest in content area literacy environments. First, we compare how interest is defined and generally how it has been assessed. Second, we focus more specifically on the assessment of text-based interest, and consider its assessment in less explored realms of the content area classroom that include hypertext and discussions. Third, we investigate how interest develops as students progress through their educational careers and how it is maintained over time. Fourth, we explore how assessing interest involves examining other student factors that are closely related to interest such as knowledge, importance, and strategic processing. Finally, we offer thoughts regarding directions educators can take in assessing interest within the complex literacy environment of today's content area classroom.  相似文献   

More than just fun: a place for games in playful learning / Más que diversión: el lugar de los juegos reglados en el aprendizaje lúdico     

Brenna Hassinger-Das  Tamara S. Toub  Jennifer M. Zosh  Jessica Michnick  Roberta Golinkoff  Kathy Hirsh-Pasek 《Infancia y Aprendizaje》2017,40(2):191-218

Games play a significant role in childhood, fuelling hours of engagement and social interaction, and probably much learning as well. Board games, card games and outdoor games (such as Tag) first come to mind, but more recently, games have also gone digital. In this piece, we offer a new perspective by placing games within the established construct of ‘playful learning’. We review key elements of playful learning and the two subtypes: free play and guided play. We suggest that games promote learning in ways similar to other playful learning situations. Games involve fun, a sense of curiosity and an inhibition of reality, in active, engaging, meaningful and socially interactive contexts. We argue that games therefore belong alongside free play and guided play to form a trio of playful learning experiences. This perspective adds to a growing understanding of the role of games in supporting children’s learning and development.  相似文献   

Passive Accomplice or Active Disruptor     

Tamara Witschge 《Journalism Practice》2014,8(3):342-356

Mediatization of politics in the institutional perspective is commonly taken to refer to the interactions between political actors and media actors, where the first become increasingly governed by media logic and the latter become increasingly independent from other institutions. Even though we could picture the relations between the different constituents as a triangle with audience, media and political actors as equally important corners, the institutionalist perspective does not give equal attention to the audience as actor in the process. In this article, I ask to what extent audience participation in news production affects our understanding of the process of mediatization of politics. I discuss both how audience participation can be seen as a challenge to media's role in politics (challenging the current conceptualization of mediatization of politics) as well as how the theory of mediatization can be seen to be confirmed by currently dominant audience participation practices. In the first understanding, we can argue that audience participation challenges independence of institutional media actors (to give more power to both audiences and politicians). In the latter understanding, audience participation can be seen to be governed by the same commercial interests as other media production and in addition that both mainstream and alternative media are subject to search engine logic. This article then calls for a critical examination of our understanding of mediatization of politics to do justice to the multiplicity of logics informing media practices, the multiplicity of actors producing news and, crucially, the interaction between those logics and actors.  相似文献   

Three Contemporary Dilemmas for Rural Superintendents     

Aimee Howley  Megan Eliason Rhodes  Jacqueline J. Yahn 《Peabody Journal of Education》2014,89(5):619-638

The school district is the fundamental administrative unit of schooling in the United States and the superintendent the lead official. The nature and the challenges of this position, however, vary across the landscape. Because most superintendents lead rural districts, the challenges facing those districts are the ones that typically bedevil the superintendency overall (perhaps a surprising thought to many readers). From this vantage, we theorize such challenges overall, and illustrate the theory with three episodes: (1) the continuing threats of school and district consolidation; (2) the arrival of ethnic diversity in previously all-White rural places; and (3) the leasing of school lands for mining, with a focus on hydraulic fracturing (“fracking”).  相似文献   

The social–emotional development of dual language learners: Looking back at existing research and moving forward with purpose     

Tamara G. Halle  Jessica Vick Whittaker  Marlene Zepeda  Laura Rothenberg  Rachel Anderson  Paula Daneri  Julia Wessel  Virginia Buysse 《Early childhood research quarterly》2014

This review describes the state of existing knowledge with regard to dual language learners’ (DLLs) social–emotional development birth to age 5. The review focuses on several widely recognized dimensions of children's social–emotional development: self-regulation, social competence, social cognition, and problem behaviors. We begin by presenting a theoretical perspective that frames our understanding of the interplay between relational and contextual factors that contribute to the social–emotional well-being of DLLs. A targeted search of the literature identified 14 peer-reviewed studies published from 2000 to 2011 that examined social–emotional outcomes for young DLLs in family, school, and peer contexts. Results suggest that DLLs have at least equal (if not better) social–emotional outcomes compared to native English speakers. There is also some evidence that the use of the home language in early childhood classrooms can be a positive, moderating factor for DLLs’ social–emotional development. Contextual and individual characteristics are highly correlated with DLL status, making it difficult to develop clear conclusions about the unique influence of DLL status on social–emotional outcomes. We conclude by identifying avenues for future inquiry.  相似文献