Ratios of h-cores,h-tails and uncited sources in sets of scientific papers and technical patents

Five ratios R_H, R_T, S_H, S_T and S_Z derived from the three-part division of a set of sources in h-core, h-tail and uncited sources are defined. Dynamic changes in the three independent ratios R_H, S_H and S_Z are studied for six selected topics. Data about these topics are obtained from the Web of Science for scientific papers and Derwent Innovations Index for technical patents. It is observed that all R_H- and S_H-values decrease when the time span widens, while S_Z stays the same or increases; and that all R_H- and S_H-values for papers are larger than the corresponding values for patents. The shifted Lotka distribution is used in a theoretical interpretation of these empirical phenomena.     

Using the curriculum emphasis concept to investigate teachers’ curricular beliefs in the context of educational reform

This paper reports a study on teachers’ domain‐specific beliefs about the chemistry curriculum for upper‐secondary education in The Netherlands. Teachers’ beliefs were investigated using a questionnaire focused on the goals of the chemistry curriculum. The design of the questionnaire was based on three curriculum emphases: ‘fundamental chemistry’, ‘chemistry, technology and society’, and ‘knowledge development in chemistry’. The questionnaire was administered to a sample of Dutch chemistry teachers. The results indicate that, on the whole, the curriculum emphasis ‘fundamental chemistry’ received the strongest support. This is in accordance with the content and the tradition of the Dutch chemistry curriculum. When the two types of upper‐secondary education were compared, it appeared that ‘chemistry, technology and society’ was almost equally valued for both types of education. However, the curriculum emphasis, ‘knowledge development in chemistry’, was considered much more important for pre‐university education than for senior general secondary education.     

Comparing Methods for Addressing Missingness in Longitudinal Modeling of Panel Data

Respondent attrition is a common problem in national longitudinal panel surveys. To make full use of the data, weights are provided to account for attrition. Weight adjustments are based on sampling design information and data from the base year; information from subsequent waves is typically not utilized. Alternative methods to address bias from nonresponse are full information maximum likelihood (FIML) or multiple imputation (MI). The effects on bias of growth parameter estimates from using these methods are compared via a simulation study. The results indicate that caution needs to be taken when utilizing panel weights when there is missing data, and to consider methods like FIML and MI, which are not as susceptible to the omission of important auxiliary variables.     

Videotaping as a Means of Self-Monitoring to Improve Theater Students' Performance

The purpose of this study was to investigate the effects of retroactive and focused self-monitoring, actualized by videotaping, on children's theater performance. In Experiment 1, 20 students in a theater performance program were randomly assigned to either a control or a self-monitoring condition, and their weekly rehearsals were videotaped. Only students in the self-monitoring condition viewed their videotaped rehearsals. The authors found that retroactive self-monitoring enhanced theater performance. In Experiment 2, 36 children preparing for a Christmas play were randomly assigned to either a focused or to a general self-monitoring condition. They viewed their videotaped rehearsals; the focused self-monitoring group received a list of important aspects of the performance to watch. The focused self-monitoring enhanced the children's performance in the play.     

Being Labeled Nerd: Factors That Influence the Social Acceptance of High-Achieving Students

The present investigation addresses the question of whether certain factors can protect high-achieving students at risk for being labeled a nerd against devaluation. In 2 studies, 125 and 317 students from Grade 8 evaluated vignettes describing average students and students who were called “nerds.” Results indicate that being modest about good grades, being engaged in sports, and being sociable led to higher liking. In students who were labeled nerds, but not in average students, display of effort led to less favorable evaluations. The effects of the aforementioned factors were moderated by the gender of the perceivers and targets. Findings are discussed with respect to gender-role stereotypes and the self presentation of high-achieving students.     

Using Problem-Centered Learning for Teaching Collaboration in a General Methods Course

Beginning secondary school teachers need support. Although no panacea is available for assuring successful classroom practice, the authors provide suggestions resulting from thirty plus years experience as classroom teachers, school administrators, and university professors. These suggestions focus on classroom management, and they include helping students become academically engaged, organizing instruction to accommodate students' strengths and needs, and motivating students to be interactive during instructional activities. Becoming an effective teacher, however, is a unique journey, and classroom management is only one important factor that can make the journey more successful for both students and teachers.     

Creativity and mathematical problem posing: an analysis of high school students' mathematical problem posing in China and the USA

In the literature, problem-posing abilities are reported to be an important aspect/indicator of creativity in mathematics. The importance of problem-posing activities in mathematics is emphasized in educational documents in many countries, including the USA and China. This study was aimed at exploring high school students' creativity in mathematics by analyzing their problem-posing abilities in geometric scenarios. The participants in this study were from one location in the USA and two locations in China. All participants were enrolled in advanced mathematical courses in the local high school. Differences in the problems posed by the three groups are discussed in terms of quality (novelty/elaboration) as well as quantity (fluency). The analysis of the data indicated that even mathematically advanced high school students had trouble posing good quality and/or novel mathematical problems. We discuss our findings in terms of the culture and curricula of the respective school systems and suggest implications for future directions in problem-posing research within mathematics education.     

Students and school characteristics related to elementary school students' views of the nature of science

The purpose of this study is to investigate student- and school-level factors that help to explain the difference in the nature of science (NOS) views. Overall, the design of this study is correlational. The sample consisted of 3062 students enrolled in the sixth, seventh, and eighth grades of elementary schools in Turkey. A hierarchical linear modelling was selected as a modelling technique. This study has established the importance of the student's socioeconomic background, learning approaches undertaken, self-efficacy, and motivational goals in the formation of their NOS views. The findings reveal that quality of both the physical infrastructure of schools and the educational resources in schools, parent educational levels, student achievement, self-efficacy, experience of meaningful learning, and learning goal orientation are positively related to different dimensions of student NOS views. Additionally, performance goal orientation and rote learning approaches have a negative relationship with different dimensions of student NOS views.