In "Postscript: The Remaining Questions" (Medical Care, 2000, 38:9, Supplement II, 290-210), Donald Patrick and Yen-Pin Chiang identify deficiencies in the health outcomes assessment field:
"In particular, there are 4 issues, although we have strived to address them [in a recent 2-day conference], that nonetheless remain largely unresolved in our view. We believe, however, these are issues and concerns of critical importance and deserve much further deliberation as the field moves forward."
1. "Our critical deficiency in relating the measurement metrics to the patients/consumers and clinicians in sufficiently meaningful ways."
2. "It is clearly a daunting task to develop universal instruments that promise conceptual and psychometric equivalence across an array of diverse populations. The prospect of an infinite number of instruments simply based on whatever the characteristics are of the population subgroups is not entirely encouraging or appealing."
3. "... the minimal set of standards to be applied in all applications for defining minimally important change. ... What are the standardized reporting requirements for responsiveness and interpretation, and can these be made generalizable?"
4. "... all the different weights derived from different methods and elicitation procedures are not necessarily meant to capture the same concept."
For those acquainted with the history of physics, these issues will sound familiar. It required 250 years (1600-1850) for the science of thermometry to achieve meaningful metrics (issue 1), universal instruments (issue 2) and general standards (issue 3).
In its earliest stage, the thermoscope (perhaps invented by Galileo in 1593) confused heat with atmospheric pressure (issue 4). Consequently, the thermoscope became the ancestor of both the thermometer and the barometer.
But progress in health outcomes assessment is rapid. An intention of the coming ICOM conference (opposite) is to address these issues head-on.
John Michael Linacre
Patrick D., Chiang Y.-P. (2001) Health Outcomes Assessment: The Remaining Questions. Rasch Measurement Transactions 14:4 p.782
Health Outcomes Assessment: The Remaining Questions. Patrick D., Chiang Y.-P., Linacre J.M. Rasch Measurement Transactions, 2001, 14:4 p.782
|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|
|Jan. 30-31, 2020, Thu.-Fri.||A Course on Rasch Measurement Theory - Part 1, Sydney, Australia, course flyer|
|Feb. 3-7, 2020, Mon.-Fri.||A Course on Rasch Measurement Theory - Part 2, Sydney, Australia, course flyer|
|Jan. 24 - Feb. 21, 2020, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|Apr. 14-17, 2020, Tue.-Fri.||International Objective Measurement Workshop (IOMW), University of California, Berkeley, https://www.iomw.org/|
|May 22 - June 19, 2020, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|June 26 - July 24, 2020, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com|
|June 29 - July 1, 2020, Mon.-Wed.||Measurement at the Crossroads 2020, Milan, Italy , https://convegni.unicatt.it/mac-home|
|July 1 - July 3, 2020, Wed.-Fri.||International Measurement Confederation (IMEKO) Joint Symposium, Warsaw, Poland, http://www.imeko-warsaw-2020.org/|
|Aug. 7 - Sept. 4, 2020, Fri.-Fri.||On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com|
|Oct. 9 - Nov. 6, 2020, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|June 25 - July 23, 2021, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com|
The URL of this page is www.rasch.org/rmt/rmt144f.htm