Classroom Emotional Support predicts differences in preschool children's cortisol and alpha-amylase levels     

Bridget E. Hatfield  Linda L. Hestenes  Victoria L. Kintner-Duffy  Marion O’Brien 《Early childhood research quarterly》2013

Accumulating evidence suggests children enrolled in full-time child care often display afternoon elevations of the hormone cortisol, which is an indicator of stress. Recent advances in immunoassays allow for measurement of activity in the hypothalamic–pituitary–adrenal axis and the autonomic sympathetic nervous system from saliva, and measurement of both systems provides a more complete understanding of activity in the stress response system. This study is the first to examine both cortisol and alpha-amylase in children attending child care and focuses on the influences of specific indicators of classroom process quality. A diverse sample of 63 preschool children nested in 14 classrooms of varying quality participated in this study; child salivary cortisol and alpha-amylase were collected at six times over 2 days. Results indicate that children in classrooms with higher Emotional Support displayed a greater decline in cortisol from morning to afternoon. Further, children in classrooms with higher Emotional Support exhibited lower total alpha-amylase output while attending child care. Implications for professional development for early childhood teachers and measurement of classroom quality are discussed.  相似文献   

The contributions of parental management language to executive function in preschool children     

Samantha W. Bindman  Annemarie H. Hindman  Ryan P. Bowles  Frederick J. Morrison 《Early childhood research quarterly》2013

This study investigated relations between preschoolers’ emergent executive function skills and their interactions with parents, with particular focus on the verbal utterances parents use to guide children's behavior (i.e., management language). Parent–child dyads (n = 127) were videotaped during a structured play task and the frequency of two types of management language, Direction (high control) and Suggestion (low control), was observed. Children's executive function was assessed using the Head–Toes–Knees–Shoulders (HTKS) task. Latent growth modeling was used to investigate relations between management language and the development of children's executive function. Direction language (i.e., commands) was negatively associated with children's age three executive function but not significantly related to the rate of executive function development over time. Conversely, Suggestion language (i.e., questions and statements that offer children some degree of choice) was positively related to executive function at age three but negatively related to growth. The potential importance of management language as a parenting behavior that contributes to various aspects of children's self-regulation during preschool and kindergarten is discussed.  相似文献   

Classroom,Home and Peer Environment Influences on Student Outcomes in Science and Mathematics: An analysis of systemic reform data     

Barry J. Fraser  Jane Butler Kahle 《International Journal of Science Education》2013,35(15):1891-1909

Using secondary analysis of a large database from a Statewide Systemic Initiative, we examined the effects of several types of environments on student outcomes. Over 3 years, nearly 7,000 students in 392 classes in 200 different schools responded to a questionnaire that assesses class, home, and peer environments as well as student attitudes. Students also completed an achievement measure that, developed by scientists, teachers, and science educators, was not aligned with any particular curriculum. Students were enrolled in middle‐school science and mathematics classes in schools that had participated in the Statewide Systemic Initiative. Rasch analyses allowed us to compare across student cohorts and across schools. Findings confirmed the importance of extending research on classroom learning environments to include the learning environments of the home and the peer group. Although all three environments accounted for statistically significant amounts of unique variance in student attitudes, only the class environment (defined in terms of the frequency of use of standards‐based teaching practices) accounted for statistically significant amounts of unique variance in student achievement scores. The findings are supported by other studies of systemic reform in the United States.  相似文献   

Responding to children’s answers: questions embedded in the social context of early childhood education     

Amanda Bateman 《Early Years: An International Journal of Research and Development》2013,33(3):275-288

This article presents analysis of question–answer sequences during problem inquiry between a teacher and two children in an early childhood crèche in New Zealand. Conversation analysis is used to reveal which questions the teacher asks, how children answer the questions, and the teacher’s responses to the child’s answers. Although adults’ ‘effective’ questions were identified and promoted in the REPEY study much less attention has been given to how adults respond to children’s answers. It is imperative to investigate the sequences of talk which follow a question in order to establish how teaching and learning is co-constructed in context, one utterance at a time and as a joint project between teacher and child. The findings suggest that task problems and emotional problems are treated in a similar way during problem inquiry, highlighting the complexity of interactions when teachers are providing both emotional care and educational support for young children.  相似文献   

Beyond direct neighbourhood effects: higher-order interactions improve modelling and predicting tree survival and growth     

Yuanzhi Li  Margaret M Mayfield  Bin Wang  Junli Xiao  Kamil Kral  David Janik  Jan Holik  Chengjin Chu 《国家科学评论(英文版)》2021,8(5)

It is known that biotic interactions are the key to species coexistence and maintenance of species diversity. Traditional studies focus overwhelmingly on pairwise interactions between organisms, ignoring complex higher-order interactions (HOIs). In this study, we present a novel method of calculating individual-level HOIs for trees, and use this method to test the importance of size- and distance-dependent individual-level HOIs to tree performance in a 25-ha temperate forest dynamic plot. We found that full HOI-inclusive models improved our ability to model and predict the survival and growth of trees, providing empirical evidence that HOIs strongly influence tree performance in this temperate forest. Specifically, assessed HOIs mitigate the competitive direct effects of neighbours on survival and growth of focal trees. Our study lays a foundation for future investigations of the prevalence and relative importance of HOIs in global forests and their impact on species diversity.  相似文献   

Children's views of collaborative learning     

Sandra Tunnard 《Education 3-13》2013,41(2):159-164

Collaborative learning is a widely used and popular strategy in many primary schools. In this article, the authors review the nature and purpose of collaborative learning and present a summary of how one small group of Year 5/6 children view its effectiveness.  相似文献   

Ethyl Silicate for Unbaked Earth Tablets Conservation: Evaluation of the Physico-mechanical Aspects     

Mathilde Tiennot  Jean-Didier Mertz  Ann Bourgès  Anne Liégey  Atika Chemmi  Anne Bouquillon 《文物保护研究》2020,65(5):285-295

ABSTRACT

Preservation of cuneiform tablets made with clay minerals is an ongoing conservation issue. A treatment based on TEOS consolidation has been used since 1996 at the Louvre museum. The characterization of the tablets pointed out kaolinite, illite, and smectite as the three main clay minerals constituting the objects. In this research, the physico-mechanical aspects of the treatment are investigated. The penetration depth of the TEOS solution and the gradient induced are quantified using laboratory samples. TEOS treatment preserves the macroscopic swelling and the vapour transfer properties, but modifies the clay’s affinity to moisture. Elastic properties are gradually improved for all clays, but only kaolinite’s strength increases significantly. The impact of TEOS treatment on the natural behaviour related to the respective structure of the clays is considered, and the amount of kaolinite required to create adequate reactions appears to be of interest for conservation treatments.  相似文献   

A Multicomponent Library Resource Model to Enhance Academic Global Health Education Among Residency Programs     

Rupa R. Patel  Sandhiya Ravichandran  Michelle M. Doering  Angela C. Hardi 《Medical reference services quarterly》2017,36(2):120-128

Global health is becoming an increasingly important component of medical education. Medical libraries have an opportunity to assist global health residents with their information needs, but first it is important to identify what those needs are and how best they can be addressed. This article reports a collaboration between global health faculty and an academic medical librarian to assess the information needs of global health pathway residents and how assessment data are used to create a multicomponent program designed to enhance global health education.  相似文献   

Chemistry: The Middle Kingdom     

Gautam R. Desiraju 《Resonance》2007,12(7):44-60

Chemistry occupies a unique middle position between physics and mathematics on the one side and biology, ecology, sociology and economics on the other. It is said that chemistry is reducible into physics and finally mathematics. However, in moving from the covalent to the non-covalent world we obtain a new chemistry, one that is a starting point for the emergence of the soft sciences. This article argues that this new chemistry represents a paradigm shift in the way in which chemists think about their subject today. Biology may be considered as emerging out of this new chemistry, which in itself cannot be reduced into physics and mathematics as was the case for chemistry thus far practiced. This dualistic nature of chemistry, reducible and irreducible, is a new development but one that ensures that the subject will remain alive and well in the foreseeable future. Gautam R. Desiraju has made seminal contributions to the development and worldwide growth of the subject of crystal engineering, especially with reference to the properties of novel interaction types such as the weak hydrogen bond. He has been at the University of Hyderabad since 1979. “... so chemistry can be no more than systematic art or experimental teachings, indeed never real science, because its principles ... do not lend themselves to the application of mathematics.” Immanuel Kant  相似文献   

A meta-study of qualitative research on mental toughness development     

David R. Anthony  Daniel F. Gucciardi  Sandy Gordon 《International review of sport and exercise psychology》2016,9(1):160-190

Mental toughness (MT) is considered a necessary ingredient for high-level performance. Unsurprisingly, scholarly interest in the development of mental toughness has increased over the past decade, with much of this work informed by qualitative designs. No study to date has systematically reviewed and integrated this body of qualitative research on MT development. The primary purpose of this study was to create an integrated theoretical framework that incorporates extant MT development research in sport and performance settings. Three subsequent aims were to (a) systematically review and evaluate the qualitative literature regarding key developmental factors and processes for MT; (b) synthesise knowledge of key developmental factors and processes for MT; and (c) generate an integrated framework that can inform future research and advancement in theory with regard to MT development. Following a systematic search of online journals, search engines, and databases, 10 papers met the criteria for inclusion and were retained. These studies served as the primary data for meta-data, meta-method, and meta-theory analyses, which were integrated using a meta-synthesis approach. Four key themes were identified from the existing qualitative evidence: personal characteristics, interactions with environment, progressive development, and breadth of experience. These unique themes were integrated with existing theory to propose a bioecological model of MT development that encompasses interdependent interactions among the person, proximal processes, context, and time. We describe how this model can be used as a heuristic for research and practice, and underscore the importance of methodological diversity for future work on the development of MT.  相似文献