Author ranking evaluation at scale     

Marcel Dunaiski  Jaco Geldenhuys  Willem Visser 《Journal of Informetrics》2018,12(3):679-702

We evaluate author impact indicators and ranking algorithms on two publication databases using large test data sets of well-established researchers. The test data consists of (1) ACM fellowship and (2) various life-time achievement awards. We also evaluate different approaches of dividing credit of papers among co-authors and analyse the impact of self-citations. Furthermore, we evaluate different graph normalisation approaches for when PageRank is computed on author citation graphs.We find that PageRank outperforms citation counts in identifying well-established researchers. This holds true when PageRank is computed on author citation graphs but also when PageRank is computed on paper graphs and paper scores are divided among co-authors. In general, the best results are obtained when co-authors receive an equal share of a paper's score, independent of which impact indicator is used to compute paper scores. The results also show that removing author self-citations improves the results of most ranking metrics. Lastly, we find that it is more important to personalise the PageRank algorithm appropriately on the paper level than deciding whether to include or exclude self-citations. However, on the author level, we find that author graph normalisation is more important than personalisation.  相似文献   

Numerical methods in subsurface hydrology : by Irwin Remson,George M. Hornberger and Fred J. Molz. 389 pages,diagrams, 6×9 in. New York,Wiley (Interscience), 1971. Price $16.95 (approx. £6·50).     

Willem Brutsaert 《Journal of The Franklin Institute》1973,295(6):505-506

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Influencing citizen behavior: Experiences from multichannel marketing pilot projects     

Lidwien van de WijngaertAuthor Vitae  Willem PietersonAuthor Vitae  Marije L. TeerlingAuthor Vitae 《International Journal of Information Management》2011,31(5):415-419

Information technology allows national and local governments to satisfy the needs of citizens in a cost effective way. Unfortunately, citizens still tend to prefer traditional, more costly channels, such as the front desk, phone and mail. Through pilot projects government agencies attempt to influence this behavior of citizens, directing them towards the online channel. With this paper we provide insight into the possibility to influence citizens’ behavior in the complex landscape of multi-channel service provision. The paper systematically compares five pilot projects using a framework that is based on organizational and marketing literature. The results show that socio-psychological factors are crucial in multi-channel management, much more than the technology itself. We conclude that citizens can be directed towards the online channel. However, not all projects are successful. Economic and legal instruments tend to sort more direct effects than communication or service instruments. Moreover, organizational factors such as bureaucracy often hinder eventual success. Choosing a smart and relatively small scope and strong project manager may help to evoke success in directing citizen online behavior.  相似文献   

Measurement Bias Detection Through Factor Analysis     

Willem E. Saris  Albert Satorra  William M. van der Veld 《Structural equation modeling》2013,20(4):561-582

Assessing the correctness of a structural equation model is essential to avoid drawing incorrect conclusions from empirical research. In the past, the chi-square test was recommended for assessing the correctness of the model but this test has been criticized because of its sensitivity to sample size. As a reaction, an abundance of fit indexes have been developed. The result of these developments is that structural equation modeling packages are now producing a large list of fit measures. One would think that this progression has led to a clear understanding of evaluating models with respect to model misspecifications. In this article we question the validity of approaches for model evaluation based on overall goodness-of-fit indexes. The argument against such usage is that they do not provide an adequate indication of the “size” of the model's misspecification. That is, they vary dramatically with the values of incidental parameters that are unrelated with the misspecification in the model. This is illustrated using simple but fundamental models. As an alternative method of model evaluation, we suggest using the expected parameter change in combination with the modification index (MI) and the power of the MI test.  相似文献   

Hostile attribution of intent and aggressive behavior: a meta-analysis     

Orobio de Castro B  Veerman JW  Koops W  Bosch JD  Monshouwer HJ 《Child development》2002,73(3):916-934

A meta-analytic review was conducted to explain divergent findings on the relation between children's aggressive behavior and hostile attribution of intent to peers. Forty-one studies with 6,017 participants were included in the analysis. Ten studies concerned representative samples from the general population, 24 studies compared nonaggressive to extremely aggressive nonreferred samples, and 7 studies compared nonreferred samples with children referred for aggressive behavior problems. A robust significant association between hostile attribution of intent and aggressive behavior was found. Effect sizes differed considerably between studies. Larger effects were associated with more severe aggressive behavior, rejection by peers as one of the selection criteria, inclusion of 8- to-12-year-old participants, and absence of control for intelligence. Video and picture presentation of stimuli were associated with smaller effect sizes than was audio presentation. Staging of actual social interactions was associated with the largest effects. The importance of understanding moderators of effect size for theory development is stressed.  相似文献   

Effects of problem-based discussion on studying a subsequent text: A randomized trial among first year medical students     

de Grave  Willem S.  Schmidt  Henk G.  Boshuizen  Henny P.A. 《Instructional Science》2001,29(1):33-44

The Purpose of this study was to examine effectsof group discussion of a medical problem on the comprehension of a subsequentproblem-relevant text by first year medical students.Forty-eight first-year medical students were randomly assigned toone of two conditions: The experimental group discussed a problem of blood pressureregulation, where the control group discussed a problem of vision. Subsequently, allstudents studied a text on the physiology of blood pressure regulation. Finally, a freerecall test was administered. Numbers of propositions accurately recalled were analyzed usinganalysis of variance (ANOVA). Students who discussed the blood pressure regulationproblem recalled 25% more from the text than those who discussed the control problem.This difference was statistically significant. The present study represented thefirst truly randomized trial in the ecologically valid context of a medical curriculum. Itdemonstrated the positive effects of problem-based tutorial group discussion on thecomprehension of text. It confirmed earlier findings from laboratory studies thatproblem-based learning, in addition to positive emotional and motivational long-term effectswell-documented in the literature, also has positive effects on learning.  相似文献   

Gender organization of schooling and television viewing among early adolescents: a test of two alternative hypotheses     

Herman Brutsaert 《Educational studies》2004,30(4):471-483

In this analysis, single‐sex and mixed schools are compared in terms of pupils' television viewing habits, the latter factor being considered as an indicator of a pupil's sense of educational responsibilities. It was hypothesized that the presumably lower levels of television watching among girls attending single‐sex schools could be explained by school climate factors pertaining to adolescent subculture values and/or to the pedagogic approaches of a predominantly female staff. Use was made of data from 68 academic‐type secondary schools in Flanders (Belgium). Of these schools, 25 were mixed and 43 were single‐sex (21 girls', and 22 boys' schools). Respondents were third‐year pupils: 3370 girls and 3057 boys, aged 14 and 15 years. A multilevel analysis (HLM) was performed controlling for parental socio‐economic status, curriculum enrolment, school residency and school mean SES. The results mainly indicate that the differential effect of single‐sex and coeducational schools on girls' TV watching habits may be partially accounted for by factors associated with pedagogic approaches by the predominantly female staff in girls' schools, but not at all by norms related to the adolescent subculture.  相似文献   

International research on computers in education     

Pelgrum  Willem J. 《Prospects》1992,22(3):341-349

Since 1987, International Co-ordinator of the IEA Computers in Education Study; was national project coordinator for the IEA Second International Mathematics Study and Second International Science Study (1980–85). Co-author of several published studies on the Second International Science Study as well as The Implemented and Attained Mathematics Curriculum: A Comparison of Eighteen Countriesand The Use of Computers in Education Worldwide.  相似文献   

The relationship among students' reading performance,their classroom behavior,and teacher skills     

Saskia K. Brokamp  Antonia A. M. Houtveen  Willem J. C. M. van de Grift 《The Journal of educational research》2019,112(1):1-11

The relationship among students' reading performance, their behavior (task-focused behavior, emotional stability, and compliant behavior) in the classroom, and the teacher's skills was investigated in 66 third-grade classrooms. Results from this study showed the students' reading performance and their behavior in the classroom are all significantly interrelated. Better reading performance at the beginning of the school year goes with better behavior at the end of the school year. In turn, better behavior at the beginning of the school year goes with better reading performance at the end of the school year. The teacher can improve the behavior of the students by providing high-quality reading instruction. Some teacher skills have differential effects, however, on the various behavioral aspects. The implications for the educational practice as well as for future research are discussed.  相似文献   

Visuospatial ability factors and performance variables in laparoscopic simulator training     

Jan-Maarten Luursema  Willem B. Verwey  Remke Burie 《Learning and individual differences》2012,22(5):632-638

Visuospatial ability has been shown to be important to several aspects of laparoscopic performance, including simulator training. Only a limited subset of visuospatial ability factors however has been investigated in such studies. Tests for different visuospatial ability factors differ in stimulus complexity, in their emphasis on identifying visual stimuli in a cluttered context, and in the demands they make on speed of processing. To help clarify the involvement of visuospatial ability factors in laparoscopic performance the current study investigated the role of four such factors in laparoscopic simulator performance. Twenty four students participated in a two-month course, consisting of eight weekly, half-hour laparoscopic simulator training sessions. Before the start of this course four visuospatial ability factors were measured. Learning curves were based on the simulator performance variables of (task) Duration, Motion efficiency, and Damage. The visuospatial ability factor Visualization impacted Damage and Motion efficiency. The factor Spatial relations impacted Damage. Visuospatial ability factors measuring the ability to mentally manipulate complex to moderately complex stimuli are more important than other visuospatial ability factors during basic laparoscopic simulator training. A finding relevant to theories of skill development is that the impact of Visualization on learning curves for Damage and Motion efficiency was most evident during early- and late (but not middle) training, which may be an indicator of a switch between different phases of skills learning. Learning curves and repeated measures analyses indicated damage control should be emphasized in laparoscopic skills training.  相似文献