The International Journal of Educational and Psychological Assessment contains papers relating to Classical Test Theory (CTT), Item Response Theory (IRT) and Rasch measurement. Unfortunately these papers present a confusing perspective on Rasch measurement. For instance,
1. Cutoff Scores: The Basic Angoff Method and the Item Response Theory Method. Niclie Tiratira. <! a href="http://tijepa.books.officelive.com/Documents/article5v1.pdf" target="p">tijepa.books.officelive.com/Documents/article5v1.pdf
This articles employs Bigsteps and Winsteps, without citing the sources, in an IRT context, and reports results with no sense of the fingernails-on-the-blackboard dissonance infit and outfit have relative to IRT.
2. The Measurement of Change in Groups and Individuals With Particular Reference to the Value of Change Scores: A New IRT-Based Methodology for the Assessment of Treatment Effects. Jörg A. Prieler and John Raven. <! a href="http://tijepa.books.officelive.com/Documents/A3V3_TIJEPA.pdf" target="q">tijepa.books.officelive.com/Documents/A3V3_TIJEPA.pdf
This article asks and answers the following questions:
Question 1. Does the portrayal of parallel item characteristic curves (ICCs) in Rasch computer analysis output mislead many into thinking the item difficulty order is independent of ability?
Their answer: Yes. But the Rasch answer: No. Rasch analysis deliberately constructs item difficulties which are as independent as statistically possible of ability.
Question 2. Do the crossing ICCs in a 3-parameter IRT analysis indicate that the appropriate model for these data is one that describes the interactions making item and person estimates dependent on one another?
Their answer: Yes. But the Rasch answer: No. Crossing ICCs are never an appropriate model (except for some polytomous models.) Construct validity demands that the item difficulty hierarchy is invariant across person abilities.
Question 3: Are the "most popular versions of Item Response Theory" often loosely referred to as "the Rasch model"?
Their answer: Yes. But the Rasch answer: No. IRT is a descriptive statistical methodology originated by Frederic Lord. Rasch analysis is a prescriptive measurement methodology originated by Georg Rasch. One of Lord's IRT models resembles a Rasch model.
Comment: What chaos! The force of the academically-dominant IRT paradigm's influence is truly impressive: it is able to make people see things that don't exist, and to let them ignore existing things that don't fit with their preconceptions. How will these kinds of misconceptions ever be corrected? Will it all come out in the wash at some point down the road when invariance, sufficiency and additivity are demanded as basic elements of credible psychometric measurement?
William P. Fisher, Jr.
IRT and Confusion about Rasch Measurement, W.P. Fisher, Jr. ... Rasch Measurement Transactions, 2010, 24:2 p. 1288
|Rasch Measurement Transactions (free, online)||Rasch Measurement research papers (free, online)||Probabilistic Models for Some Intelligence and Attainment Tests, Georg Rasch||Applying the Rasch Model 3rd. Ed., Bond & Fox||Best Test Design, Wright & Stone|
|Rating Scale Analysis, Wright & Masters||Introduction to Rasch Measurement, E. Smith & R. Smith||Introduction to Many-Facet Rasch Measurement, Thomas Eckes||Invariant Measurement: Using Rasch Models in the Social, Behavioral, and Health Sciences, George Engelhard, Jr.||Statistical Analyses for Language Testers, Rita Green|
|Rasch Models: Foundations, Recent Developments, and Applications, Fischer & Molenaar||Journal of Applied Measurement||Rasch models for measurement, David Andrich||Constructing Measures, Mark Wilson||Rasch Analysis in the Human Sciences, Boone, Stave, Yale|
|in Spanish:||Análisis de Rasch para todos, Agustín Tristán||Mediciones, Posicionamientos y Diagnósticos Competitivos, Juan Ramón Oreja Rodríguez|
|Forum||Rasch Measurement Forum to discuss any Rasch-related topic|
Go to Top of Page
Go to index of all Rasch Measurement Transactions
AERA members: Join the Rasch Measurement SIG and receive the printed version of RMT
Some back issues of RMT are available as bound volumes
Subscribe to Journal of Applied Measurement
Go to Institute for Objective Measurement Home Page. The Rasch Measurement SIG (AERA) thanks the Institute for Objective Measurement for inviting the publication of Rasch Measurement Transactions on the Institute's website, www.rasch.org.
|Coming Rasch-related Events|
|June 23 - July 21, 2023, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com|
|Aug. 11 - Sept. 8, 2023, Fri.-Fri.||On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com|
The URL of this page is www.rasch.org/rmt/rmt242e.htm