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51.
In this paper we present a new methodology for detecting differential item functioning (DIF). We introduce a DIF model, called the random item mixture (RIM), that is based on a Rasch model with random item difficulties (besides the common random person abilities). In addition, a mixture model is assumed for the item difficulties such that the items may belong to one of two classes: a DIF or a non-DIF class. The crucial difference between the DIF class and the non-DIF class is that the item difficulties in the DIF class may differ according to the observed person groups while they are equal across the person groups for the items from the non-DIF class. Statistical inference for the RIM is carried out in a Bayesian framework. The performance of the RIM is evaluated using a simulation study in which it is compared with traditional procedures, like the likelihood ratio test, the Mantel-Haenszel procedure and the standardized p -DIF procedure. In this comparison, the RIM performs better than the other methods. Finally, the usefulness of the model is also demonstrated on a real life data set.  相似文献   
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The Family Service Units is a national charity working in some of the most deprived areas of the country. This paper is concerned with one part of its work, The Connections Project. This project aims to develop non-punitive anti-bullying partnerships between young people, schools, adults in the community and other agencies. This article focuses on a particular aspect of this project, the Support Code, which seeks to promote an ethos of proactive mutual support. The development is described and the teachers' reactions are explored. Though this work is currently being undertaken in primary schools, much is applicable to the early years of secondary education too.  相似文献   
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London is one of the world's foremost music cities. Using a statistical approach developed in earlier studies of music in the United Kingdom (NMC, 1996; NMC, 1999), this chapter presents the results of a survey commissioned by London Arts from researchers at the University of Westminster. The chapter draws together available data oh the commercial and public sectors of the industry, on live performances and their audiences, on education and training and on exports. This data has been supplemented by new research, notably in the area of live performance and in identifying geographical ‘clusters’ of music business firms in certain areas of inner London.

Among the key findings of the research are that consumer spending represents some 90 per cent of the £1.1 billion total spending on music in London; consumers spent more on concert tickets and entrance charges for music of all types than on CDs and other soundcarriers; music provides the equivalent of 34,000 full‐time jobs in London and creates added value of over £1 billion and the London music business has net foreign earnings of over £400 million per annum.

The chapter concludes with some reflections on the implications of this research for music policy at both the national and city level. The statistical evidence demonstrates that classical music, a genre with only 10 per cent of the audience, continues to attract over 90 per cent of public subsidy. A similar imbalance in training of education of musicians means that the development of many young and talented non‐classical musicians is left to the vagaries of the market.  相似文献   

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In this article, I outline a number of issues in the development of consultation practice in the Lincolnshire Educational Psychology Service. This includes the principles of operation that have guided our development of practice, our continual practice of review and our method of recording outcomes. The overall perspective on accountability is that it must start with the consultee.  相似文献   
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Changing lifestyles are having an impact on programs for young children. Recently these programs have adjusted to meet the needs of children from one-parent homes, broken homes, and teen homes. Now children of mixed racial and ethnic backgrounds are an ever-increasing phenomenon in programs. He is a parent of four interracial children and lectures on this topic  相似文献   
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