How do students process complex formative feedback in question-answering tasks? A think-aloud study     

Máñez  Ignacio  Vidal-Abarca  Eduardo  Kendeou  Panayiota  Martínez  Tomás 《Metacognition and Learning》2019,14(1):65-87

Metacognition and Learning - The goal of this study was to examine how students process formative feedback that included corrective and elaborative information in online question-answering tasks....  相似文献   

Vocational behavior and development in times of social change: new perspectives for theory and practice     

Fred W. Vondracek  Joaquim Armando Gomes Ferreira  Eduardo Jo?o Ribeiro dos Santos 《International Journal for Educational and Vocational Guidance》2010,10(2):125-138

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Post-modern Attitudes: a challenge to democratic education   总被引：1，自引：0，他引：1  

Eduardo Terrén 《European Journal of Education》2002,37(2):161-177

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Evaluation of a new equation for estimating low-density lipoprotein cholesterol through the comparison with various recommended methods     

Eduardo Martínez-Morillo  María García-García  María Angeles Luengo Concha  Luis Rello Varas 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2021,31(1)

IntroductionThe accurate estimation of low-density lipoprotein cholesterol (LDL) is crucial for management of patients at risk of cardiovascular events due to dyslipidemia. The LDL is typically calculated using the Friedewald equation and/or direct homogeneous assays. However, both methods have their own limitations, so other equations have been proposed, including a new equation developed by Sampson. The aim of this study was to evaluate Sampson equation by comparing with the Friedewald and Martin-Hopkins equations, and with a direct LDL method.Materials and methodsResults of standard lipid profile (total cholesterol (CHOL), high-density lipoprotein cholesterol (HDL) and triglycerides (TG)) were obtained from two anonymized data sets collected at two laboratories, using assays from different manufacturers (Beckman Coulter and Roche Diagnostics). The second data set also included LDL results from a direct assay (Roche Diagnostics). Passing-Bablok and Bland-Altman analysis for method comparison was performed.ResultsA total of 64,345 and 37,783 results for CHOL, HDL and TG were used, including 3116 results from the direct LDL assay. The Sampson and Friedewald equations provided similar LDL results (difference ≤ 0.06 mmol/L, on average) at TG ≤ 2.0 mmol/L. At TG between 2.0 and 4.5 mmol/L, the Sampson-calculated LDL showed a constant bias (- 0.18 mmol/L) when compared with the Martin-Hopkins equation. Similarly, at TG between 4.5 and 9.0 mmol/L, the Sampson equation showed a negative bias when compared with the direct assay, which was proportional (- 16%) to the LDL concentration.ConclusionsThe Sampson equation may represent a cost-efficient alternative for calculating LDL in clinical laboratories.  相似文献   

A Lakatosian Framework to Analyze Situations of Cognitive Conflict and Controversy in Students' Understanding of Heat Energy and Temperature     

Laburú  Carlos Eduardo  Niaz  Mansoor 《Journal of Science Education and Technology》2002,11(3):211-219

The objective of this study is to analyze secondary school students' interactions (conflicts, controversies, and arguments) as they participate in an intact classroom activity designed to facilitate their understanding of heat energy and temperature. The study is based on 32 ninth-grade students in a public school in Londrina, Brazil. Results obtained show that the differentiation between heat energy and temperature constitutes considerable difficulties for the students, and can be considered as part of the hard-core of their understanding (Lakatos, 1970, Criticism and the Growth of Knowledge, Cambridge University Press, Cambridge, UK, pp. 91–196). Student interactions (video taped) were classified into an Alternative Model, Transitional Model, and Scientific Model, depending on the degree to which they reflected a progressive transition in their hard-core. Students generally resisted a change in their conceptual understanding. Some students were able to question the hard-core of their beliefs and construct a Transitory Model. Some students experienced a further progressive transition by constructing a Scientific Model, based on the understanding that Temperature only measures the energy of agitation. Methodology used also provided a glimpse of how a particular student grappled with the conflicts in order to facilitate progressive transition in understanding. It is concluded that given the opportunity to discuss, reflect, consider alternative/conflicting situations, students can construct models that increase progressively in their heuristic/explanatory power.  相似文献   

Teacher counter stories to a citizenship education mega policy narrative. Preparing for citizenship in Chile     

Eduardo Cavieres-Fernández 《课程研究杂志》2017,49(4):414-436

The present article focuses on the counter stories of two Chilean social studies high school teachers. Counter stories describe how teachers use their professional experience to confront those mega narratives composed of dominant educational policies that impinge upon their pedagogical practices. The mega narrative described in this study as a citizenship education mega policy narrative is composed by citizenship educational guidelines that have become influenced by other market-driven educational policies, and is not only present in Chile but has also been influenced by policies coming from countries such as England and the US. Therefore, the discussions that emerge from these counter stories on the nature of this mega narrative and the ways through which teachers can confront it through their teaching, and the implications that all this has for the field of citizenship education, do not only fill a gap in Chilean research but also contribute to discussions on counter and mega narratives in the field of citizenship education within a wider international scope.  相似文献   

Ethnic Identity Development and Acculturation Preferences Among Minority and Majority Youth: Norms and Contact          下载免费PDF全文

Roberto González  Brian Lickel  Manisha Gupta  Linda R. Tropp  Bernadette P. Luengo Kanacri  Eduardo Mora  Pablo De Tezanos‐Pinto  Christian Berger  Daniel Valdenegro  Oscar Cayul  Daniel Miranda  Patricio Saavedra  Michelle Bernardino 《Child development》2017,88(3):743-760

This article tests a longitudinal model of the antecedents and consequences of changes in identification with indigenous (Mapuche) among indigenous and nonindigenous youth in Chilean school contexts over a 6‐month period (633 nonindigenous and 270 Mapuche students, M_ages = 12.47 and 12.80 years, respectively). Results revealed that in‐group norms supporting contact and quality of intergroup contact at Time 1 predicted student's changes in Mapuche identification at Time 2, which in turn predicted changes in support for adoption of Chilean culture and maintenance of Mapuche culture at Time 2; some of the relationships between these variables were found to be moderated by age and ethnicity. Conceptual and policy implications are addressed in the Discussion .  相似文献   

Signal constellations in the hyperbolic plane: A proposal for new communication systems     

Eduardo Brandani da Silva  Marcelo Firer 《Journal of The Franklin Institute》2006,343(1):69-82

Signal constellations in the hyperbolic plane are provided as an alternative to traditional signal constellations in the Euclidean plane, since channels may actually exist for which the latter signal constellations are not as suitable as the former. A hyperbolic gaussian probability density function, based solely on geometrical considerations, is derived to determine the performance of the hyperbolic signal constellations. Benefits result from an approach conceived in terms of reduced signal-to-noise ratio, needed to achieve a prescribed error rate and equivalent optimum receiver complexity.  相似文献   

Cross-over, thresholds, and interactions between science and technology: lessons for less-developed countries     

Américo Tristão Bernardes  Eduardo da Motta e Albuquerque 《Research Policy》2003,32(5):865-885

Presently, science is an important precondition for the economic development of less-developed countries. This paper discusses the specific roles that science has at initial stages of development, pointing to its contributions for the countries’ absorptive capability. Furthermore, this paper specifies the role of science for initiating a positive interaction with technological development, since initial stages of development and during catching up processes. For less-developed countries, neither the linear model of technology nor an “inverted linear model” would take place: a more interactive approach is necessary for development. Using statistics of patents (USPTO) and scientific papers (ISI) for 120 countries (1974, 1982, 1990, and 1998), this paper analyses some evidences on thresholds levels of scientific production to originate an interactive relationship between science and technology. These data also document that the value of this threshold seems to double from one period to another. Although this paper presents tentative results, some policy implications are discussed: scientific institutional building must be seen as a component of modern industrial policies.  相似文献   

George Glasson and George Bogg��s prospects on the environmental friendly relationship and ecojustice     

Eduardo Dopico 《Cultural Studies of Science Education》2011,6(2):347-350

This rejoinder to George Glasson and George Bogg’s papers provides additional conversation for considering the idea that we try to develop: leaving the classroom to continue teaching. Converting the teaching–learning process into research experiences brings our students not only scientific knowledge, but also an understanding of the research procedures. To be involved in field work, students can connect more personally the local action with global issues. On the ground in which we operate, environmental science, teaching of knowledge is insufficient if not accompanied by ecological experiences where students can see and share the needs of environmental protection and the idea of sustainability. Both response authors tell us about their own experiences in research in this regard. In their essays we can appreciate the desire to investigate human activities on ecosystems. Reading it makes us look with passion and awareness at the different consequences for our ecological environments: if we develop environmentally consequential behavior or harmful lifestyles for the planet. Furthermore, they warn us of the need to follow the development of students learning and reflect on the ways in which it produces time-causal relationship between persons and the environment.  相似文献