Reality and Imagination

Since...perception only gives information of this external world or of physical reality indirectly, we can only grasp the latter by speculative means. It follows from this that our notions of physical reality can never be final. We must always be ready to change these notions...in order to do justice to perceived facts in the most logically perfect way.
Albert Einstein in F.S.C. Northrop (1949) The Meeting of East and West. Macmillan. p. 249.

"Never let reality get in the way of imagination. imagination."
Azar Nafisi, author of Reading Lolita in Teheran


Theory vs. Practice

"People sometimes say, This is right in theory but it doesn't work in practice. They ought to say, This is wrong in theory and consequently it is wrong in practice. There is no true theory which could be wrong in practice. This contrast between theory and practice is contrived by people who want to escape hard and thorough thinking. They like to abide in the shallowness of accustomed practices, on the surface of a so-called experience. They will accept nothing but a repeated confirmation of something they already know or believe. Only those questions for truth which have challenged and disturbed centuries of practice have brought about a fundamental transformation of practice. This is true of the history of science, morals and religion." Paul Tillich, "Doing the Truth", in "The Shaking of the Foundations", 1949.

"There is nothing so practical as a good theory." Kurt Lewin, 1890-1947, quoted in Tom Peters, Liberation Management, Macmillan, 1992, p.153.


Inadequate Measurement?

"The importance of measurement to social research is well stated in an observation by Hauser (1969, 127-9): I should like to venture the judgment that it is inadequate measurement, more than inadequate concept or hypothesis, that has plagued social researchers and prevented fuller explanations of the variances with which they are confounded.

"But why are the social sciences characterized by inadequate measurement? We would suggest that a fundamental component of any complete answer must be the popular definition of the term, that provided by Stevens (1951, 22): Measurement is the assignment of numbers to objects or events according to rules. This definition implies that measurement is mainly an empirical, almost mechanistic, process. In other words, Stevens' definition does not refer to the theoretical component of the measurement process. But measurement serves a vital theoretical purpose, as aptly described by Blalock (1970, 88-89): Measurement considerations often enable us to clarify our theoretical thinking and to suggest new variables that should be considered. It is often thought, prior to measurement, that we really understand the nature of a phenomenon because we have experienced it directly. Careful attention to measurement may force a clarification of one's basic concepts and theories."
From R.A. Zeller & E.G. Carmines (1980) Measurement in the social sciences. Cambridge: Cambridge University Press.

Measurement is much more than better quantification of the known. It is a voyage of discovery into the unknown. The great value of telescopes is not that they enable astronomers to perceive more clearly what they can already observe, but that they enable the investigation of the guessed at, the discovery of the unforeseen:

"The reason we are on a higher imaginative level [in 1963 than in 1923] is not because we have a finer imagination, but because we have better instruments. In science, the most important thing that has happened in the last forty years is the advance in instrumental design... A fresh instrument serves the same purpose as foreign travel; it shows things in unusual combinations. The gain is more than a mere addition; it is a transformation."
Alfred North Whitehead (1963) Science and the Modern World, New York: New American


Cannot be Measured?

"Many have decried the separate components that make up America's [college entrance selection] frenzy. Yet few have totaled up the human cost of this nonsense, which encourages young people to equate their self-worth with grades and test scores. Inner-directedness becomes a means, not an end, and failure becomes the ultimate disgrace, rather than a learning experience. Risk-taking and experimentations come to be viewed as errors in sound planning. Worse, service to fellow human beings is reduced to another outside activity to be listed on an application form. Because they cannot be measured, moral and spiritual development count for little."

S. Frederick Starr (1991) Colleges call it application time..., The Open Book, IV, 2, p.4.


Election of SIG Officers

SIG elected officers for April 1994 to April 1996 are:

Chair: George Engelhard, Jr.
Secretary/Treasurer: Carol M. Myford

Ballots mailed (Dec. 1993). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Ballots returned (Feb. 16, 1994). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Ballots spoiled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

For Chair:
George Engelhard, Jr.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
William P. Fisher, Jr. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

For Secretary/Treasurer:
Carol M. Myford. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
William Boone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Vote Counters: Kathy Green, Ming Wa and Yap Ak

Quotations and notations. Rasch Measurement Transactions 1994 8:1 p.319ff.


Quotations and notations. … Rasch Measurement Transactions, 1994, 8:1 p.319ff.

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

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Coming Rasch-related Events
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
April 13-17, 2018, Fri.-Tues. AERA, New York, NY, www.aera.net
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
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