医学期刊差异化办刊策略初探

通过引入生物学领域生态位理论和经济学领域差异化概念,提出科技期刊理念差异化、产品差异化和服务差异化等3个差异化办刊层次。以中华医学会系列杂志,尤其是耳鼻咽喉头颈外科领域系列杂志为主要研究对象,阐明这3个差异化办刊层次。     

无约束优化问题推广的对角二阶拟柯西算法

利用推广的二阶拟Newton方程,提出了一种推广的对角二阶拟柯西算法,在新算法中引入了参数θ,使得对角二阶拟柯西法可以推广到更大的范围.并且证明了在一定的条件下新算法的全局收敛和超线性收敛.最后通过数值试验说明了新算法是有效可行的.     

二维非定常对流扩散方程的高精度紧致半显式差分格

在已有文献的基础上,发展了一种求解二维非定常对流扩散方程的高精度紧致半显式差分格式,其截断误差为O（τ2 ＋h4）,该格式形式上是隐式,但实际上可以显式计算.利用Fourier分析法证明该格式是无条件稳定的.数值实验结果验证了该格式的精确性和可靠性.     

Valid inferences of teachers’ judgements of pupils’ reading literacy: does formal teacher competence matter?

The primary aim of this study was to investigate whether and, if so, how formal teacher competence relates to the relationship between pupil reading achievement and teachers judgements’ of pupils’ reading achievement. The data come from the Swedish participation in the Progress in International Reading Literacy Study (PIRLS) 2001 in Grade 3. Information was obtained from pupils (N = 5271) and teachers (N = 351). Analyses were conducted using multilevel structural equation modeling (SEM) with random slopes. Teacher competence was operationalized using multiple observed indicators and defined as a latent variable. A higher correspondence between teacher judgements and pupil reading achievement for teachers with higher competence was found. The results highlight the importance of teacher competence in assessment practice.     

An Experimental Study of the Effect of Educational Guidance on a Selected Group of High School Sophomores

The question of an interaction over time between ability grouping and personality variables was the focus of the present study which examined pertinent data from 260 female high school students. Two standardized personality instruments, in addition to several scales designed by the E’s, were administered to students of the upper and lower ability tracks in a Catholic high school, grades 9 and 12. Ss in the lower track were found to have a lower need for achievement, a higher need to avoid failure, and a higher average score of test anxiety than Ss in the upper track. The effects of ability grouping did interact with grade level for a correlate of personality, level of aspiration. Relative to Ss in the upper track, the lower track Ss experienced a reduction in level of aspiration over time. Both future directions of associated research and educational practices were discussed within the context of the present findings.     

The Index of Forecasting Efficiency,for the Case of a “True” Criterion

A variety of personal characteristics have been shown to be influential in teacher-student relationships. The sex of the child as well as the appropriateness of his behavior were the factors evaluated in this study. An analysis of the results indicated that sex-inappropriate behavior was viewed less favorably than sex-appropriate behavior. A discussion of the results was presented with regard to support for previous studies and implications for future research.     

Formal Teacher Competence and its Effect on Pupil Reading Achievement

The main aim of this study was to investigate the impact of formal teacher competence on pupils' reading achievement. The data comes from the Swedish participation in PIRLS 2001 in grade 3. Information was obtained from pupils (n = 5271) and teachers (n = 351). The analyses were conducted using 2-level structural equation modeling. Teacher competence was operationalized with multiple observed indicators and defined as a latent variable. Two measures of achievement were used: PIRLS 2001 reading test results and teacher judgement of pupil performance in the Swedish language. The results reveal that teacher competence was positively and similarly related to both achievement measures. No selection effects in terms of pupil socioeconomic status were found. The current study provides evidence for a strong impact of teacher competence on pupil reading achievement.     

Changes in the Multi‐Level Effects of Socio‐Economic Status on Reading Achievement in Sweden in 1991 and 2001

This study examines the changes in educational inequality at the school‐ and individual‐levels in 1991 and 2001. Comparisons are made between the IEA Reading Literacy Study 1991 and the so called 10‐Year Trend Study in PIRLS 2001. The between‐school differences in reading achievement variance and the size of the relationship between SES and reading achievement at school‐level are the two main focuses. Applying a two‐level structural equation modeling technique, it was found that the between‐school differences in reading achievement were greater in RLS 2001 than in RLS 1991, and the school SES effect has been strengthened over time. These changes indicate that educational inequality in Sweden has increased over time. Some possible explanations to these changes are discussed with reference to school reforms and demographic changes.     

Master’s thesis projects: student perceptions of supervisor feedback

A growing body of research has investigated student perceptions of written feedback in higher education coursework, but few studies have considered feedback perceptions in one-on-one and face-to-face contexts such as master’s thesis projects. In this article, student perceptions of feedback are explored in the context of the supervision of master’s thesis projects, using review studies with respect to effective feedback in coursework situations. Online questionnaires were administered to collect data from three cohorts of master’s students who were either working on their thesis or had recently finished it (N?=?1016). The results of the study indicate that students perceive the focus of feedback in terms of a focus on task and self-regulation; they perceive the goal-relatedness of feedback in terms of feed up (goal-setting) and feed back-forward (how am I going and where to next?); and elaboration of feedback is perceived in terms of positive and negative feedback. Furthermore, students that perceive the feedback to be positive, and to provide information on how they are going and what next steps to take, are the most satisfied with their supervision and perceive they are learning most from their supervisor. The findings are discussed in relation to findings in coursework settings, and are explained using goal orientation theories.     

Connections between learning experience,study behaviour and academic performance: a longitudinal study

Background:?Whilst past studies have established the joint influence of student learning experience and study behaviour on academic achievement, few attempts have been made to determine their causal ordering in a longitudinal framework.

Purpose:?This study explored the reciprocal relationship between learning experience and study behaviour, and examined their relative impact on university students' academic performance.

Sample:?Participants were 396 undergraduate students from a university in Hong Kong (191 men, 205 women).

Design and methods:?Students' learning experience and study behaviour were evaluated using the Course Experience Questionnaire (CEQ) and the Learning and Study Strategies Inventory (LASSI). A two-wave cross-lagged structural model was constructed to examine the reciprocal effects between learning experience and study behaviour measured over a 12-month period.

Results and conclusions:?The findings showed that after controlling for previous academic achievement, student learning experience measured at Time 1 exerted significant influence on study behaviour measured at Time 2, and study behaviour measured at Time 1 also exerted significant impact on learning experience at Time 2. Both constructs were significantly predictive of current academic performance.

Conclusions:?Results from this study outlined linkages between learning experience and study behaviour in influencing academic achievement. As the current study is based on students from a single university, further studies with different student populations are recommended. The implications of fostering motivation and enhancing university learning experience are discussed.