The underarm throw for accuracy in children     

J H Van Rossum  R J Bootsma 《Journal of sports sciences》1989,7(2):101-112

Forty boys and girls of two age groups (mean ages 52 and 70 months, respectively) performed 35 trials on a throwing task demanding accuracy. As might be expected, the older children were significantly more accurate than the younger ones but there were no sex differences. Film analysis of the throws showed that, although both age groups attempted to employ the adult strategy of varying velocity while keeping ball-release angle constant, the younger group was less successful in the latter aspect. The manner in which consistent release angles were arrived at by the older group was through the use of a movement pattern in which the elbow angle did not change during the forward swing. Such a movement pattern appeared less frequently in the younger age group. The results of this study provide support for a mode of research identifying functionally relevant kinematic variables that can subsequently be shown to follow from distinctive execution categories. In such a way, changes in outcome measures with increasing age and/or skill level can be functionally understood and identified.  相似文献   

A Method for Studying Climate-related Changes in the Condition of Decorated Wooden Panels     

S. Ekelund  P. Van Duin  A. Jorissen  B. Ankersmit  R. M. Groves 《文物保护研究》2018,63(2):62-71

Museum objects are often highly complex and composed of materials with varying properties, some of which may have changed as a result of ageing and/or conservation treatments. Research into defining sustainable environmental conditions by balancing energy cost and risk to these vulnerable objects has mainly focused on experiments in laboratories with new, single materials or on computer modelling, but only to a limited extent on actual objects. This paper presents a method to collect empirical data from a large group of decorated wooden panels in order to investigate the effects of humidity fluctuations on these objects and relate them to their material properties and construction. Wooden panels were chosen as they are regarded to be particularly sensitive to fluctuations in relative humidity. The fluctuations may cause the wood to shrink and swell and can result in open glue joints, cracks, and deformation of the panels as well as losses and cracks in the decorative layers. Empirical data are scarcely available as yet but are essential to study relationships between material properties, type of construction, damage, and as input and validation for modelling and experimental studies. The method, referred to as the Rijksmuseum Study, was performed on a group of 300 objects from the furniture and paintings collections of the Rijksmuseum.  相似文献   

Ebooks Versus Print Books: Format Preferences in an Academic Library     

Weijing Yuan  Marlene Van Ballegooie  Jennifer L. Robertson 《资料收集管理》2018,43(1):28-48

When a scholarly monograph is made available in both print and electronic formats, which format will users prefer? This study analyzed monograph usage data from three university presses in the University of Toronto Libraries' collections, comparing print and ebook usage patterns of identical titles. The goal was to examine format preferences and determine whether there are differences in usage across subject disciplines or publishers. The study showed that although in many cases users preferred one format over another, they used books in both formats. If a subject was popular, usage tended to be high for both formats, and if unpopular, low for both formats. The data also indicated that there were some noticeable differences in ebook usage for particular subjects, and the authors concluded that format does matter and therefore it is desirable for libraries to provide both formats if possible. The study also highlighted how critical metadata are in promoting the use of electronic resources. If there were no ebook metadata within the library catalog, the ebook usage was low. This analysis adds to a growing body of literature in user preferences on book formats that can assist libraries in making better-informed decisions in collection building.  相似文献   

Pre-service Teachers' Preferred Strategies for Solving Arithmetic and Algebra Word Problems     

Wim Van Dooren  Lieven Verschaffel  Patrick Onghena 《Journal of Mathematics Teacher Education》2003,6(1):27-52

In this study we investigate the arithmetic andalgebra word problem-solving skills andstrategies of future primary and secondaryschool teachers in Flanders (Belgium).Moreover, we describe the evolution of theseskills and strategies from the beginning to theend of their teacher education. The resultsshow that future secondary school mathematicsteachers preferred the use of algebra, evenwhen an arithmetic solution was morestraightforward. The solutions of futureprimary school teachers were more diverse: onesubgroup tended to apply exclusively arithmeticmethods (which led to failures on the mostdifficult word problems), whereas anothersubgroup was more adaptive in its strategychoices. Finally, student teachers evolved intheir problem-solving skills during theirteacher education, but not in their strategypreferences. The research findings indicatethat, in the education of pre-service primaryand secondary school teachers, there is a needfor an explicit treatment of pupils' transitionfrom arithmetical to algebraic thinking.  相似文献   

Opening up towards children’s languages: enhancing teachers’ tolerant practices towards multilingualism     

Anouk Van Der Wildt  Piet Van Avermaet  Mieke Van Houtte 《School Effectiveness & School Improvement》2017,28(1):136-152

Mainstream teachers struggle with linguistic diversity, often leading to restricting multilingualism. Scientific research, however, recommends including pupils’ home languages in school. Various qualitative studies have evaluated implementations in schools and indicated possibilities for improving teachers’ attitudes towards multilingualism. This paper evaluates an experimental implementation targeting an increase in tolerance towards multilingualism. The implementation was facilitated by external school coaches and consisted of 3 experimental tools affecting the school. Data originated from 62 Flemish primary schools (of which half were experimental schools) that participated in 3 survey waves (2012 and 2014; 763 teachers completed both waves). We used multilevel regression. We concluded that the implementation leads to higher rates of tolerance. The fulfilment of the basic conditions needed for a successful change was important, and the linguistic diversity of the pupil population and the investment by external school coaches did not affect the tolerant practices of teachers towards multilingualism.  相似文献   

Personality characteristics of engineers     

H. T. Van Der Molen  H. G. Schmidt  G. Kruisman 《European Journal of Engineering Education》2007,32(5):495-501

The objective of the current study was to investigate the personality characteristics of a group of engineers with a variety of years of experience. It was executed to remedy shortcomings of the literature concerning this issue and to produce suggestions for a postgraduate training programme for engineers. A total of103 engineers were tested with the five-factor personality inventory (FFPI), a ‘big five’ personality test of Dutch origin. The engineers were shown to score lower on the factor agreeableness, and higher on the factors extraversion, conscientiousness, emotional stability, and autonomy than a national comparison group. The older the engineers, the more conscientious and autonomous they were. In addition, engineers with lower degrees were more conscientious than engineers with higher degrees. A practical implication of the findings for the postgraduate training of engineers is that more attention should be paid to the development of interpersonal skills.  相似文献   

The use of speech feedback by normal and disabled readers in computer-based reading practice     

Victor H. P. Van Daal  Pieter Reitsma 《Reading and writing》1993,5(3):243-259

Disabled readers and normal beginning readers were compared on requesting help in the form of speech feedback during computer-based word reading. It was also examined whether it is best to give feedback on all words or to allow the disabled readers to choose. Normal beginning readers and reading-age matched pupils with reading problems engaged in reading practice with speech feedback on call for both difficult and easy words. A set of both difficult and easy sums was completed as a control task. Another group of reading-disabled pupils who were also matched on reading level practiced the reading of words with unsolicited speech feedback. In the first two groups the selectivity in requesting help in both the reading and arithmetic task was assessed. All subjects were tested on the reading of both practiced and nonpracticed words. The results indicate that both disabled readers and beginners were very sensitive to sum difficulty but not to word difficulty, though in the present study the students were more selective than in a previous study. The inclusion of more easy words might account for this finding. The beginners requested help only during the first sessions of reading practice, whereas the disabled readers remained dependent on the speech feedback. The reading-disabled pupils did not learn less when the computer unsolicitedly delivered the spoken form of all words than when they were allowed to choose. It is discussed how profits from the different speech feedback procedures by disabled readers might be related to word decoding skill and metacognitive monitoring.  相似文献   

IJEVG and CDQ Editors’ Joint Statement on the Special International Issues     

Raoul Van Esbroeck  Jerry Trusty 《International Journal for Educational and Vocational Guidance》2005,5(2):83-84

Editorial

IJEVG and CDQ Editors’ Joint Statement on the Special International Issues  相似文献   

An alternative to foster care for victims of child abuse/neglect: a university-based program     

M J Van Meter 《Child abuse & neglect》1986,10(1):79-84

Two central forces dominated the conception and development of the Parents and Children Together (PACT) project: the need for provision of an in-home alternative to foster care for abuse and/or neglect families and the prevention of further abuse and/or neglect in the family. Wayne State University in Detroit is the site for Parents and Children Together (PACT) project, a contractual service of the Michigan Department of Social Services (DSS). Graduate students provide in-home services to referred families who, due to child abuse or neglect, would otherwise have their child(ren) removed from the home. This family-based work is a one-year cooperative education experience for students interested in professions in the human services. This report discusses the PACT project as a grant operated through the university, the specification of course work associated, and the attraction of students to graduate study with "hands-on" experience. All of these program attributes, as well as the resource of the project for research, make it an important effort for the university. Further, the university has an additional meaningful role with community residents. Beyond university and student opportunities, the DSS and its clients benefit by having broad-based expertise brought into homes on a weekly basis. Annual success rates of keeping children out of foster care are cited along with cost effectiveness. The university's role in levels of prevention in a highly coordinated community effort is indicated.  相似文献   

Towards a general model of quality assessment in higher education   总被引：7，自引：2，他引：7  

Frans A. Van Vught  Don F. Westerheijden 《Higher Education》1994,28(3):355-371

In this article a number of elements of a general model of quality assessment in higher education are presented. On the one hand these elements are put in a historical context of quality assessment in Medieval universities and, on the other hand, deduced from the recent experiences with quality assessment in both North-American and Western European countries. With respect to the historical context a distinction is made between the intrinsic and the extrinsic values of higher education. Two types of quality assessment related to these values are also distinguished. Concerning the recent experiences with quality assessment systems, the practices in the U.S.A., Canada, France, the Netherlands and the United Kingdom are explored. In the final section the general mode of quality assessment is discussed in the context of the distinction between the intrinsic and the extrinsic values of higher education.  相似文献