Georg Rasch Reviews "Probabilistic Models"

Byrum, Denmark Oct 13th, 1978

Dear Ben [Wright]:
As you presumably already know and anyhow will realize from the enclosed [correspondence], I have indeed cooled down to acquiescing to a reprinting of Prob. Mod. - such as it is! (possibly after some misprints and the like have been removed).

Which does not mean that today I am satisfied with the book. On the contrary, already years ago I played with the idea of rewriting it completely in view of the developments both as regards access to electronic facilities and as regards the theoretical foundation, since 1960.

However, lecturing in Australia, on what I knew by then, and at the same time receiving from my young friend Kare Borchsenius very advanced contributions to the theory of specific objectivity, convinced me that my primary obligation for the next few years must be to concentrating upon the specific objectivity, clarifying its foundations and demonstrating how it lies at the bottom of general statements with well-defined fields of validity. - In which connection I may have to return to the weakest part of the book, viz., Chs. VI [Control of the model] and VII [Notions implied in the structural model for items].

But even if a revision of these chapters - and, in fact, some more sections - are indeed desirable, I don't think that Ch. VI will do much harm, because nobody will use its technique [Rasch's emphasis] any more = to somebody it may even turn out to be a challenge to establishing as detailed and effective model controls on a theoretically firm basis.

Ch. VII is a different and deeper problem. Its real limitation lies in starting from a pretending that it is known what "measuring" is, not only of accelerations - which are the reactions to be observed -but also of mass and force which in fact should be derived from the structure of the reactions. That such derived measures might have to be confronted with directly defined measures of mass and force is a further complication that presumably would require supplementary (thought-) experiments.

All of which I did not realize in 1960 - neither did Maxwell in 1876, nor did Newton some 200 years earlier.

So far, so bad, as regards what I attempted to do in Ch. VII. But today the situation has changed to the worse: even direct measurement leaves a lot to be desired as regards its conceptual clarity. That this is so, is a rather recent discovery of where the usual axioms of measurement come from. That current theory of measurement looks like the mathematics of real numbers may be very convenient, but if that were a necessity, then it should be derived from something more serious than a pure analogy. And in particular the attempts at generalizing to multidimensional measurement so far have seemed to end up with purely mathematical ingenuity, without any necessity.

What to do then? Well, the theory already developed for comparing objects with specific objectivity with a framework where the objects react to contacting a set of agents can be applied directly to a situation where the set of agents is the same as the set of objects, thus providing for objects being "compared" by means of contacts with other objects, that, I think, is what lies at the bottom of "direct measurement". [See paired comparisons, RMT 9:2 p.425].

Realizing this is, however, so recent a discovery to me that you will not even find it in the reprint [Danish Philosophical Yearbook, 1977] that I am anxious to send you, but it can in fact be derived from it.

My reason for at all mentioning this matter here is to make clear that even a revision of Ch. VII would not be feasible within the framework on which the whole book has been built up.

And this is my final argument for leaving the book as it is!
Georg Rasch


"G. Rasch's Probabilistic Models.. book represents an attempt to create new paths for scientific behavioral statistics which, till now, have confused groups with individuals... We encourage as many people as possible to obtain and read the book."
from a 1962 review by Sven Rydberg, University of Stockholm, Nordisk Psykologi, 14(7), p.347-8.


Georg Rasch reviews "Probabilistic Models". Rasch G. … Rasch Measurement Transactions, 1995, 9:2 p.424

Please help with Standard Dataset 4: Andrich Rating Scale Model



Rasch Publications
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

To be emailed about new material on www.rasch.org
please enter your email address here:

I want to Subscribe: & click below
I want to Unsubscribe: & click below

Please set your SPAM filter to accept emails from Rasch.org

www.rasch.org welcomes your comments:

Your email address (if you want us to reply):

 

ForumRasch 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
March 31, 2017, Fri. Conference: 11th UK Rasch Day, Warwick, UK, www.rasch.org.uk
April 2-3, 2017, Sun.-Mon. Conference: Validity Evidence for Measurement in Mathematics Education (V-M2Ed), San Antonio, TX, Information
April 26-30, 2017, Wed.-Sun. NCME, San Antonio, TX, www.ncme.org - April 29: Ben Wright book
April 27 - May 1, 2017, Thur.-Mon. AERA, San Antonio, TX, www.aera.net
May 26 - June 23, 2017, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
June 30 - July 29, 2017, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com
July 31 - Aug. 3, 2017, Mon.-Thurs. Joint IMEKO TC1-TC7-TC13 Symposium 2017: Measurement Science challenges in Natural and Social Sciences, Rio de Janeiro, Brazil, imeko-tc7-rio.org.br
Aug. 7-9, 2017, Mon-Wed. In-person workshop and research coloquium: Effect size of family and school indexes in writing competence using TERCE data (C. Pardo, A. Atorressi, Winsteps), Bariloche Argentina. Carlos Pardo, Universidad Catòlica de Colombia
Aug. 7-9, 2017, Mon-Wed. PROMS 2017: Pacific Rim Objective Measurement Symposium, Sabah, Borneo, Malaysia, proms.promsociety.org/2017/
Aug. 10, 2017, Thurs. In-person Winsteps Training Workshop (M. Linacre, Winsteps), Sydney, Australia. www.winsteps.com/sydneyws.htm
Aug. 11 - Sept. 8, 2017, Fri.-Fri. On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com
Aug. 18-21, 2017, Fri.-Mon. IACAT 2017: International Association for Computerized Adaptive Testing, Niigata, Japan, iacat.org
Sept. 15-16, 2017, Fri.-Sat. IOMC 2017: International Outcome Measurement Conference, Chicago, jampress.org/iomc2017.htm
Oct. 13 - Nov. 10, 2017, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
Jan. 5 - Feb. 2, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
Jan. 10-16, 2018, Wed.-Tues. In-person workshop: Advanced Course in Rasch Measurement Theory and the application of RUMM2030, Perth, Australia (D. Andrich), Announcement
Jan. 17-19, 2018, Wed.-Fri. Rasch Conference: Seventh International Conference on Probabilistic Models for Measurement, Matilda Bay Club, Perth, Australia, Website
May 25 - June 22, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
June 29 - July 27, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com
Aug. 10 - Sept. 7, 2018, Fri.-Fri. On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com
Oct. 12 - Nov. 9, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
The HTML to add "Coming Rasch-related Events" to your webpage is:
<script type="text/javascript" src="http://www.rasch.org/events.txt"></script>

 

The URL of this page is www.rasch.org/rmt/rmt92c.htm

Website: www.rasch.org/rmt/contents.htm