RMT 26:1 Notes and Quotes

Rasch and Distributions

Question: What assumptions are made about distributions by the Rasch model?

Answer: The Rasch model makes no assumptions about the distributions of the parameters. Maximum Likelihood Estimation (MLE) assumes that the randomness in the data is normally distributed. Some estimation methods, such as Marginal Maximum Likelihood (MMLE), assume that the incidental parameters (usually persons) conform to a well-behaved distribution (usually normal).


In the realm of scientific creativity ...

"Quality is a probabilistic function of quantity."

Simonton, D. (2003), Scientific Creativity as Constrained Stochastic Behavior: The Integration of Product, Person and Process Perspectives. Psychological Bulletin, 129(4), 475-494.


ConQuest 3.0

ACER ConQuest 3.0 is software for fitting unidimensional and multidimensional item response and latent regression models. It provides data analysis based on item response models (IRM), allowing examination of the properties of performance assessments, traditional assessments and rating scales. ConQuest 3.0 offers analysis procedures based on multifaceted item response models, multidimensional item response models, latent regression models and drawing plausible values.

New Features include:

Ray Adams, Margaret Wu and Mark Wilson

conquest-sales.acer.edu.au


ORVOMS: Ohio River Valley Objective Measurement Seminar

The 2nd Annual Ohio River Valley Objective Measurement Seminar (ORVOMS) was held on May 18th, 2012 at the University of Kentucky. It was hosted by Dr. Kelly Bradley of the Department of Educational Policy Studies & Evaluation and co-sponsored by Dr. Arne Bathke of the Applied Statistics Laboratory. The keynote speaker was Dr. Richard Smith from Data Recognition Corporation. In addition to the regional attendees some participants traveled from as far away as Florida, Michigan, and Minnesota.

Presentations included:

We thank everyone who participated and presented this year - it was an interesting and collegial meeting. We look forward to next year's seminar and hope that you will be able to participate. For information about upcoming events or to be placed on our mailing list please contact:

Melanie Lybarger
Psychometric Research Associate
The American Board of Family Medicine
mlybarger ~ theabfm.org


6th Annual UK Rasch Users Group Meeting
20th March 2012, Weetwood Hall, Leeds, UK

UK Rasch User Group, /www.rasch.org.uk


Journal of Applied Measurement Vol. 13, No. 1, 2012

Richard M. Smith, Editor, www.jampress.org



Notes and Quotes, Rasch Measurement Transactions, 2012, 26:1, passim




Rasch-Related Resources: Rasch Measurement YouTube Channel
Rasch Measurement Transactions & Rasch Measurement research papers - free An Introduction to the Rasch Model with Examples in R (eRm, etc.), Debelak, Strobl, Zeigenfuse Rasch Measurement Theory Analysis in R, Wind, Hua Applying the Rasch Model in Social Sciences Using R, Lamprianou El modelo métrico de Rasch: Fundamentación, implementación e interpretación de la medida en ciencias sociales (Spanish Edition), Manuel González-Montesinos M.
Rasch Models: Foundations, Recent Developments, and Applications, Fischer & Molenaar Probabilistic Models for Some Intelligence and Attainment Tests, Georg Rasch Rasch Models for Measurement, David Andrich Constructing Measures, Mark Wilson Best Test Design - free, Wright & Stone
Rating Scale Analysis - free, Wright & Masters
Virtual Standard Setting: Setting Cut Scores, Charalambos Kollias Diseño de Mejores Pruebas - free, Spanish Best Test Design A Course in Rasch Measurement Theory, Andrich, Marais Rasch Models in Health, Christensen, Kreiner, Mesba Multivariate and Mixture Distribution Rasch Models, von Davier, Carstensen
Rasch Books and Publications: Winsteps and Facets
Applying the Rasch Model (Winsteps, Facets) 4th Ed., Bond, Yan, Heene Advances in Rasch Analyses in the Human Sciences (Winsteps, Facets) 1st Ed., Boone, Staver Advances in Applications of Rasch Measurement in Science Education, X. Liu & W. J. Boone Rasch Analysis in the Human Sciences (Winsteps) Boone, Staver, Yale Appliquer le modèle de Rasch: Défis et pistes de solution (Winsteps) E. Dionne, S. Béland
Introduction to Many-Facet Rasch Measurement (Facets), Thomas Eckes Rasch Models for Solving Measurement Problems (Facets), George Engelhard, Jr. & Jue Wang Statistical Analyses for Language Testers (Facets), Rita Green Invariant Measurement with Raters and Rating Scales: Rasch Models for Rater-Mediated Assessments (Facets), George Engelhard, Jr. & Stefanie Wind Aplicação do Modelo de Rasch (Português), de Bond, Trevor G., Fox, Christine M
Exploring Rating Scale Functioning for Survey Research (R, Facets), Stefanie Wind Rasch Measurement: Applications, Khine Winsteps Tutorials - free
Facets Tutorials - free
Many-Facet Rasch Measurement (Facets) - free, J.M. Linacre Fairness, Justice and Language Assessment (Winsteps, Facets), McNamara, Knoch, Fan

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Coming Rasch-related Events
Oct. 4 - Nov. 8, 2024, Fri.-Fri. On-line workshop: Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
Jan. 17 - Feb. 21, 2025, Fri.-Fri. On-line workshop: Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
May 16 - June 20, 2025, Fri.-Fri. On-line workshop: Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
June 20 - July 18, 2025, Fri.-Fri. On-line workshop: Rasch Measurement - Further Topics (E. Smith, Facets), www.statistics.com
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