Robust estimator design with an emphasis balance between performance and robustness     

Hyeon-Cheol Lee  Don R. Halverson 《Journal of The Franklin Institute》2007,344(7):954-968

From a number of ML estimators (typically unbiased) of practical interest which include the variance for a Gaussian distribution, the standard deviation for a Laplace distribution, the variance for a Rayleigh distribution and a “spread parameter” for a Cauchy distribution, we design robust estimators according to an emphasis balance between normalized performance and normalized robustness. We measure performance with inverted MSE and robustness with a differential geometric approach.  相似文献   

Student & tutor consensus: a partnership in assessment for learning     

James Thompson  Don Houston  Kathryn Dansie  Timothy Rayner  Timothy Pointon  Simon Pope 《Assessment & Evaluation in Higher Education》2017,42(6):942-952

The mistakes made when attempting tasks often prove to be some of the most invaluable learning experiences. Despite this, outcome and results driven assessment formats largely penalise student performance errors or reward students who succeed by chance. The consequences of this paradigm are visible effects on student relationships with assessment. The student–tutor consensus approach to assessment was introduced to capture student learning achieved ‘from’ assessment to complement the measurement of performance outcomes. This approach parallels student and tutor judgement in a grade negotiation, affording the student an opportunity to share with their assessor what they have learned from the assessment activity. This student self-awareness was then considered alongside the conventional outcome-based score awarded by the tutor to generate a final grade for the assessed activity. Our study evaluated the perceptions of 90 undergraduate students enrolled in the bachelor of paramedic studies, who participated in this novel assessment approach as part of a final-year capstone topic. The results comprehensively indicated value for all aspects of the assessment approach, as well as a recognition that the skills will be useful in their future professional roles.  相似文献   

Disseminating the right information to the right audience: cultural determinants in the use (and misuse) of rankings   总被引：1，自引：0，他引：1  

Leon Cremonini  Don Westerheijden  Jürgen Enders 《Higher Education》2008,55(3):373-385

Rankings and league tables, or Report Cards (RCs), of Higher Education Institutions have become a global phenomenon. Their purpose, it is claimed, is to help “student-consumers” make informed decisions. Yet the degree to which RCs succeed in helping students in their college choice is disputed. Even though RCs are intended for all, which information is sought and how it is used may differ between potential students hailing from different social, economic and cultural backgrounds. In particular, RCs may neglect certain cultural determinants that influence students’ college choice behaviour. The article reviews the literature on the cultural determinants of college choice and especially the use of RCs in the ambit of cultural determinants. In the United States, possibly because of evident educational gaps between ethnic groups in society, the issue of cultural perceptions in college choice has been addressed, albeit scantly. In Europe, this field of study is virtually non-existent, despite increasing indications that second and third generation immigrants still lag behind in terms of higher education participation and graduation rates.

Jürgen EndersEmail:

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Reasoning and the structure of knowledge in biochemistry     

Don Ploger 《Instructional Science》1988,17(1):57-76

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An Assessment of Statistical Process Control-Based Approaches for Charting Student Evaluation Scores     

Xin Ding  Don Wardell  Rohit Verma 《Decision Sciences Journal of Innovative Education》2006,4(2):259-272

We compare three control charts for monitoring data from student evaluations of teaching (SET) with the goal of improving student satisfaction with teaching performance. The two charts that we propose are a modified p chart and a z‐score chart. We show that these charts overcome some of the shortcomings of the more traditional charts for analyzing SET data. A comparison of three charts (an individuals chart, the modified p chart, and the z‐score chart) reveals that the modified p chart is the best approach for analyzing SET data because it utilizes distributions that are appropriate for categorical data, and its interpretation is more straightforward. We conclude that administrators and faculty alike can benefit by using the modified p chart to monitor and improve teaching performance as measured by student evaluations.  相似文献   

Computer spreadsheets and draw programs in the classroom     

Don Ploger  Michael Rooney  Lee Klingler 《TechTrends》1996,41(3):26-29

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Child, Program, and Family Ecological Variables in Early Intervention     

Kofi Marfo  Thomas E. Dinero  Noel Browne  Don Gallant  Rosalind Smyth  Allan Corbett 《Early education and development》1992,3(1):27-44

This study is based on a conceptual framework which emphasized the importance of viewing early intervention outcomes in relation to both program and nonprogram variables. Three broad classes of independent variables were included in the framework child, program, and family ecology. The unique and combined contributions of these three sets of variables to the prediction of three indices of intervention outcome was assessed through regression techniques. As much as 68% of the variance in children's post-intervention developmental age (DA2) was explained by the combined influence of all three classes of variables. All three classes of variables again contributed uniquely to the prediction of parental satisfaction with the intervention, explaining 45% of the variance. The three classes of variables explained 36% of the variance in children's rate of development during the intervention (RDI), although the contribution of the program class was very minimal. In addition to ascertaining the contributions of sets of variables, the importance of individual variables within sets was also examined. Results from both types of analysis underscored the important role of nonprogram variables in the determination of both child and parental outcomes. The implications of these findings for the design and evaluation of early intervention are discussed.  相似文献   

Editor’s notes     

Don E. Descy 《TechTrends》2001,45(1):2-2

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Models of shared leadership: Evolving structures and relationships     

Philip Hallinger  Don Richardson 《The Urban Review》1988,20(4):229-245

This article explores potential changes in the power relationships among teachers and principals under four emerging forms of structured teacher involvement in schoolwide decision making: Instructional Leadership Teams, Principals' Advisory Councils, School Improvement Teams, and Lead Teacher Committees. Each organizational model is described in terms of its purpose, its operation, the role of teachers and the principal, and its potential impact on teacher leadership and empowerment. A conceptual framework that views organizational power in terms of access to resources and the ability to obtain cooperation from other actors (Kanter, 1979) is utilized to gauge potential changes in the power of principal and teacher roles under each of these emerging models. The conceptual analysis suggests that models seeking to empower teachers and improve student learning must provide for increased interaction among teachers in curricular and instructional decision making.Presented at the annual meeting of the American Educational Research Association, New Orleans, April 1988.  相似文献   

Just pretending     

Marilyn Segal  Don Adcock 《Early Childhood Education Journal》1986,13(3):16-19

The appeal of fantasy is universal. Adults as well as children enjoy escaping the bonds of reality. For us as adults these flights of fantasy are usually short-lived, but for young children they are a way of life. This article focuses on structured activities for the classroom with ways to help children grow through imaginative play.This article is excerpted from the bookJust Pretending available from Mailman Family Press, 707 Westchester Ave., White Plains, NY 10604.  相似文献