The interaction between social goals and self-construal on achievement motivation

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我愛長腿叔叔 - 文字輔導對兒童成長的意義

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Development and validation of teacher motivation scale in project learning

S16 - Scale development using Rasch models: Paper 3According to self-determination theory (Ryan & Deci, 2000), different types of motivation can be placed on a continuum according to the extent they reveal self-determination. From the least self-determined to the most self-determined motivation are (a) external regulation (doing a task for external monitoring), (b) introjected regulation (doing a task for approval from others), (c) identified regulation (doing a task for its importance), and (d) intrinsic regulation (doing a task for enjoyment or interest). Based on this theoretical framework, we developed a scale to measure teachers’ motivation in implementing project learning activity. The scale consisted of 20 items grouped in 4 subscales (i.e., external, introjected, identified and intrinsic). Confirmatory factor analysis on data from 182 Chinese teachers from eight secondary schools in Hong Kong supported the four-factor structure of the scale. Results of 1-dimensional Rasch analysis using the Winsteps programme suggested that the response categories functioned well and there was more than one dimension to the data. When the data were subjected to a 4-dimensional Rasch analysis using the Conquest programme, it was found that the data fitted the model well. Overall, the teacher motivation scale was found to be reliable and valid. This instrument provides important resources for the schools that implement project learning activity.postprintThe 7th Conference of the International Test Commission: Challenges and Opportunities in Testing and Assessment in a Globalized Economy, Hong Kong, China, 19-21 July 2010. In Programme Book of the 7th Conference of the International Test Commission, 2010, p. 60, paper

Teacher and student intrinsic motivation in project-based learning

In this study we examined the relationship between teacher and student intrinsic motivation in project-based learning. The participants were 126 Hong Kong secondary school teachers and their 631 students who completed evaluation questionnaires after a semester-long project-based learning program. Both teachers and students were asked to indicate their motivation in the program, and students were also asked to report the instructional support they received from their teachers. The results of hierarchical linear modeling analyses showed that teacher intrinsic motivation predicted student intrinsic motivation directly as well as indirectly through the mediation of instructional support. When teachers reported higher intrinsic motivation in the program, their students tended to perceive receiving more support from them and to report higher intrinsic motivation in the learning experience. © Springer Science+Business Media B.V. 2008.postprin

School support and teacher motivation to implement project-based learning

The present study investigated how school support was related to teachers' motivation and willingness to persist in project-based learning. The participants were 182 Hong Kong teachers who completed a questionnaire about their school's support and their motivation to implement project-based learning. The results of structural equation modeling indicated that when teachers perceived their schools as being stronger in collegiality and more supportive of teacher competence and autonomy, they had higher motivation in project-based learning and stronger willingness to persist in this educational innovation. Perceived school support predicted teachers' attitude for future persistence both directly and indirectly through its influence on teacher motivation. The results suggest that social-contextual factors are important for teacher motivation in the implementation of educational innovations. © 2009 Elsevier Ltd.published_or_final_versio

Transcranial Doppler Ultrasound Detection of Microemboli as a Predictor of Cerebral Events in Patients with Symptomatic and Asymptomatic Carotid Disease: A Systematic Review and Meta-Analysis.

OBJECTIVE: Identification of patients who will benefit from carotid endarterectomy is not entirely effective, primarily utilising degree of carotid stenosis. This study aimed at determining if microembolic signals (MES) detected by transcranial Doppler ultrasound (TCD) can provide clinically useful information regarding stroke risk in patients with carotid atherosclerosis. METHODS: A meta-analysis of prospective studies was performed. Three analyses were proposed investigating MES detection as a predictor of: stroke or TIA, stroke alone, and stroke or TIA but with an increased positivity threshold. Subgroup analysis was used to compare pre-operative (symptomatic or asymptomatic) patients and peri- or post-operative patients. RESULTS: Twenty-eight studies reported data regarding both MES status and neurological outcome. Of these, 22 papers reported data on stroke and TIA as an outcome, 19 on stroke alone, and eight on stroke and TIA with increased positivity threshold. At the median pre-test probability of 3.0%, the post-test probabilities of a stroke after a positive and negative TCD were 7.1% (95% CI 5-10.1) and 1.2% (95% CI 0.6-2.5), respectively. In addition, the sensitivities and specificities of each outcome showed that increasing the threshold for positivity to 10 MES per hour would make TCD a more clinically useful tool in peri- and post-operative patients. CONCLUSION: TCD provides clinically useful information about stroke risk for patients with carotid disease and is technically feasible in most patients. However, the generally weak level of evidence constituting this review means definitive recommendations cannot be made

Oropharyngeal mucositis-specific quality-of-life measure in patients with cancer therapy.

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Deformations of Lifshitz holography

The simplest gravity duals for quantum critical theories with z=2 `Lifshitz' scale invariance admit a marginally relevant deformation. Generic black holes in the bulk describe the field theory with a dynamically generated momentum scale Lambda as well as finite temperature T. We describe the thermodynamics of these black holes in the quantum critical regime where T >> Lambda^2. The deformation changes the asymptotics of the spacetime mildly and leads to intricate UV sensitivities of the theory which we control perturbatively in Lambda^2/T.Comment: 1+27 pages, 12 figure

Analytic Lifshitz black holes in higher dimensions

We generalize the four-dimensional R^2-corrected z=3/2 Lifshitz black hole to a two-parameter family of black hole solutions for any dynamical exponent z and for any dimension D. For a particular relation between the parameters, we find the first example of an extremal Lifshitz black hole. An asymptotically Lifshitz black hole with a logarithmic decay is also exhibited for a specific critical exponent depending on the dimension. We extend this analysis to the more general quadratic curvature corrections for which we present three new families of higher-dimensional D>=5 analytic Lifshitz black holes for generic z. One of these higher-dimensional families contains as critical limits the z=3 three-dimensional Lifshitz black hole and a new z=6 four-dimensional black hole. The variety of analytic solutions presented here encourages to explore these gravity models within the context of non-relativistic holographic correspondence.Comment: 14 page

Abrogating cholesterol esterification suppresses growth and metastasis of pancreatic cancer

Cancer cells are known to execute reprogramed metabolism of glucose, amino acids and lipids. Here, we report a significant role of cholesterol metabolism in cancer metastasis. By using label-free Raman spectromicroscopy, we found an aberrant accumulation of cholesteryl ester in human pancreatic cancer specimens and cell lines, mediated by acyl-CoA cholesterol acyltransferase-1 (ACAT-1) enzyme. Expression of ACAT-1 showed a correlation with poor patient survival. Abrogation of cholesterol esterification, either by an ACAT-1 inhibitor or by shRNA knockdown, significantly suppressed tumor growth and metastasis in an orthotopic mouse model of pancreatic cancer. Mechanically, ACAT-1 inhibition increased intracellular free cholesterol level, which was associated with elevated endoplasmic reticulum stress and caused apoptosis. Collectively, our results demonstrate a new strategy for treating metastatic pancreatic cancer by inhibiting cholesterol esterification