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This paper presents a mixture item response tree (IRTree) model for extreme response style. Unlike traditional applications of single IRTree models, a mixture approach provides a way of representing the mixture of respondents following different underlying response processes (between individuals), as well as the uncertainty present at the individual level (within an individual). Simulation analyses reveal the potential of the mixture approach in identifying subgroups of respondents exhibiting response behavior reflective of different underlying response processes. Application to real data from the Students Like Learning Mathematics (SLM) scale of Trends in International Mathematics and Science Study (TIMSS) 2015 demonstrates the superior comparative fit of the mixture representation, as well as the consequences of applying the mixture on the estimation of content and response style traits. We argue that methodology applied to investigate response styles should attend to the inherent uncertainty of response style influence due to the likely influence of both response styles and the content trait on the selection of extreme response categories. 相似文献
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David Bolt 《Journal of Further & Higher Education》2017,41(4):556-565
In this article the tripartite model of disability is applied to the lived experience of twenty-first-century higher education. The tripartite model facilitates a complex understanding of disability that recognises assumptions and discrimination but not at the cost of valued identity. This being so, not only the normative positivisms and non-normative negativisms but also the non-normative positivisms of the classroom and the curriculum are explored. Inclusion is taken as the starting point and the argument progresses to a profound and innovational appreciation of disability. The problem addressed is that inclusion, as shown in The Biopolitics of Disability, constitutes little more than inclusion-ism until disability is recognised in the context of alternative lives and values that neither enforce nor reify normalcy. Informed by this understanding, the article adopts the disciplinary example of literary studies and refers to Brian Friel’s Molly Sweeney as a primary text. The conclusion is that, despite passive and active resistance, disability enters higher education in many ways, most of which are beneficial to students and educators alike. 相似文献
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Once a differential item functioning (DIF) item has been identified, little is known about the examinees for whom the item functions differentially. This is because DIF focuses on manifest group characteristics that are associated with it, but do not explain why examinees respond differentially to items. We first analyze item response patterns for gender DIF and then illustrate, through the use of a mixture item response theory (IRT) model, how the manifest characteristic associated with DIF often has a very weak relationship with the latent groups actually being advantaged or disadvantaged by the item(s). Next, we propose an alternative approach to DIF assessment that first uses an exploratory mixture model analysis to define the primary dimension(s) that contribute to DIF, and secondly studies examinee characteristics associated with those dimensions in order to understand the cause(s) of DIF. Comparison of academic characteristics of these examinees across classes reveals some clear differences in manifest characteristics between groups. 相似文献
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ABSTRACTMany libraries in the US and abroad have formed Sister Library partnerships with libraries in other regions of the world. Some have been very successful and are still ongoing; others have run their course once initial needs were met or the primary leaders retired or moved to other libraries. Few articles published on these partnerships discuss the successes and pitfalls from the perspective of the library administrator. In this article, the authors describe best practices from the point of library administration and how to develop a relationship that is long-lasting and successful. 相似文献
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David H. Allsopp Esther H. Minskoff Les Bolt 《Learning disabilities research & practice》2005,20(2):103-118
Abstract. This 3‐year Model Demonstration Project involved the development and field testing of an individualized course‐specific strategy instruction model with college students with learning disabilities and Attention Deficit Hyperactivity Disorder (ADHD). The 46 participants received individualized semester‐long strategy instruction by graduate students in special education. A variety of data sources were used to evaluate the implementation of the model as well as the academic success of students who received individualized strategy instruction. Quantitative analyses indicated that the group as a whole as well as the subset of students on probation and suspension significantly improved their grades and sustained this improvement over time. Qualitative analysis identified two factors related to improvement: independent use of strategies and the supportive nature of the strategy instructor–student relationship. Qualitative analysis also identified two factors related to nonimprovement: academic/cognitive skill deficits and emotional/medication‐related issues. Implications of the model for postsecondary education and suggestions for future research are discussed. 相似文献
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Pamela W. Garner Duhita Mahatmya Laurence Kimberly Moses Elizabeth N. Bolt 《Early education and development》2014,25(3):399-420
Research Findings: This study examined associations of preschool type (i.e., urban and suburban Head Start and university-affiliated center) and teacher–child variables with positive and negative child outcomes among 145 preschoolers (74 boys). Differences emerged across preschools, with urban Head Start children scoring lowest on the emotional competence measures and university-affiliated preschoolers experiencing less peer victimization than urban and suburban Head Start preschoolers. Differences across preschool types were also found for the teacher–child variables, such that teacher–child closeness was lower and teacher–child conflict and dependence were highest in the urban Head Start preschool. Regression analyses revealed significant and meaningful interactions between preschool type and teacher–child relational quality in the prediction of children's social-emotional outcomes. Teacher–child conflict was negatively associated with emotion regulation and teacher–child dependence was associated with the highest levels of emotion regulation, but only for university-affiliated preschoolers. Suburban Head Start preschoolers experienced less prosocial attention than urban Head Start preschoolers, but only when teacher–child closeness was high. Teacher–child closeness was also a negative predictor of urban Head Start preschoolers’ prosocial attention. Practice or Policy: Results point to the importance of understanding the role of teacher–child relational quality in the social-emotional development of children exposed to different preschool and environmental contexts. 相似文献
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Daniel M. Bolt 《Journal of Educational Measurement》2000,37(4):307-327
This paper considers a modification of the DIF procedure SIBTEST for investigating the causes of differential item functioning (DIF). One way in which factors believed to be responsible for DIF can be investigated is by systematically manipulating them across multiple versions of an item using a randomized DIF study (Schmitt, Holland, & Dorans, 1993). In this paper: it is shown that the additivity of the index used for testing DIF in SIBTEST motivates a new extension of the method for statistically testing the effects of DIF factors. Because an important consideration is whether or not a studied DIF factor is consistent in its effects across items, a methodology for testing item x factor interactions is also presented. Using data from the mathematical sections of the Scholastic Assessment Test (SAT), the effects of two potential DIF factors—item format (multiple-choice versus open-ended) and problem type (abstract versus concrete)—are investigated for gender Results suggest a small but statistically significant and consistent effect of item format (favoring males for multiple-choice items) across items, and a larger but less consistent effect due to problem type. 相似文献
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An Alternative to the 3PL: Using Asymmetric Item Characteristic Curves to Address Guessing Effects 
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下载免费PDF全文 Both the statistical and interpretational shortcomings of the three‐parameter logistic (3PL) model in accommodating guessing effects on multiple‐choice items are well documented. We consider the use of a residual heteroscedasticity (RH) model as an alternative, and compare its performance to the 3PL with real test data sets and through simulation analyses. Our results suggest advantages to the RH approach, including closer fit to real data, more interpretable parameter estimates, and greater psychological plausibility. 相似文献
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Ryan J. Kettler Michael C. Rodriguez Daniel M. Bolt Stephen N. Elliott Peter A. Beddow Alexander Kurz 《教育实用测度》2013,26(3):210-234
Federal policy on alternate assessment based on modified academic achievement standards (AA-MAS) inspired this research. Specifically, an experimental study was conducted to determine whether tests composed of modified items would have the same level of reliability as tests composed of original items, and whether these modified items helped reduce the performance gap between AA-MAS eligible and ineligible students. Three groups of eighth-grade students (N?=?755) defined by eligibility and disability status took original and modified versions of reading and mathematics tests. In a third condition, the students were provided limited reading support along with the modified items. Changes in reliability across groups and conditions for both the reading and mathematics tests were determined to be minimal. Mean item difficulties within the Rasch model were shown to decrease more for students who would be eligible for the AA-MAS than for non-eligible groups, revealing evidence of differential boost. Exploratory analyses indicated that shortening the question stem may be a highly effective modification, and that adding graphics to reading items may be a poor modification. 相似文献