John Michael Linacre, Ph.D.
Research Director,

Mike Linacre with Robbi the wallaby joey
Mike is also a "wild-carer", shown here with Robbie, a baby wallaby.

1965-2015 - 50 years of computer programming!

Dr. "Mike" Linacre is the Research Director of He was formerly Director of the MESA Psychometric Laboratory at the University of Chicago and has held many positions in academia. He has taught the principles and practice of Rasch measurement since the 1980s, much of that time in close collaboration with Prof. Benjamin D. Wright, who was the internationally-recognized leading proponent of Rasch methodology from 1967 to 2001.

Mike is the developer of two leading Rasch software titles, Winsteps and Facets. These originated in the MicroScale Rasch analysis program, the first commercially-published Rasch software for a PC, developed in collaboration with Ben Wright in 1984. An innovation in that software was the robust handling of missing data. Mike had programmed digital and analog computers since 1965. His first instruction in computer programming was by Sir Maurice Wilkes at Cambridge University. Wilkes wrote the world's first book on computer programming in 1951.

Mike was Editor of Rasch Measurement Transactions from 1989-2012. He has authored 200 Journal articles and Conference papers. His research interests include the measurement of health outcomes and educational testing. Mike is active in Rasch research and software development.

But, beyond all these, he sees Rasch measurement as the road ahead in Social and many other Sciences. At one time "long division" was a University topic. Now it is taught in Grade School. Rasch Measurement is the modern "long division". Visionaries, such as Dr. Linacre's long-time teacher and colleague, Ben Wright, perceive that the way ahead in science is to think clearly. Non-linear numbers are inevitably confusing - only experts can do "Richter Scale" arithmetic. Additive, equal-interval, linear numbers, the forté of Rasch measurement, lead naturally to clarity of thought. And with clarity, we can make progress (and make money!).

For more of Dr. Linacre's publications see Google Scholar.

Mike Linacre is also active in Music: Software Development, Composition and Recital.

Mike Linacre top center Staff of Suzann Campbell's baby-measuring project. Mike Linacre is top center. See RMT 10:2.

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Facets Rasch measurement software. Buy for $149. & site licenses. Freeware student/evaluation download
Winsteps Rasch measurement software. Buy for $149. & site licenses. Freeware student/evaluation download

State-of-the-art : single-user and site licenses : free student/evaluation versions : download immediately : instructional PDFs : user forum : assistance by email : bugs fixed fast : free update eligibility : backwards compatible : money back if not satisfied
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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
Winsteps Tutorials Facets Tutorials Rasch Discussion Groups

Coming Rasch-related Events
Sept. 4 - Oct. 16, 2015, Fri.-Fri. On-line workshop: Rasch Applications, Part 1: How to Construct a Rasch Scale (W. Fisher),
Sept. 9-11, 2015, Wed.-Fri. In-person workshop: Introductory Rasch (A. Tennant, RUMM), Leeds, UK,
Sept. 14-16, 2015, Mon.-Wed. IACAT Conference: International Association of Computerized Adaptive Testing, Cambridge, UK,
Sept. 14-16, 2015, Mon.-Wed. In-person workshop: Intermediate Rasch (A. Tennant, RUMM), Leeds, UK,
Sept. 17-18, 2015, Thur.-Fri. In-person workshop: Advanced Rasch (A. Tennant, RUMM), Leeds, UK,
Sept. 30 - Oct. 2, 2015, Wed.-Fri. In-person workshop: IRT and Rasch analyses using R and Concerto (C. Gibbons), Cambridge, UK,
Oct. 16 - Nov. 13, 2015, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps),
Oct. 23 - Nov. 20, 2015, Fri.-Fri. On-line workshop: Rasch Applications, Part 2: Clinical Assessment, Survey Research, and Educational Measurement (W. Fisher),
Nov. 13, 2015, Fri. In-person workshop: Rasch Models in Business Administration, in Homage to Professor Pedro Álvarez-Martínez, Tenerife, Canary Islands,
Dec. 2-4, 2015, Wed.-Fri. In-person workshop: Introductory Rasch (A. Tennant, RUMM), Leeds, UK,
March 18, 2016, Fri. UK Rasch User Group Meeting, Durham, UK,
March 23-24, 2016, Wed.-Thur. In-person workshop: Introduction to Rasch using Winsteps (W.Boone), Cincinnati OH,
April 8-12, 2016, Fri.-Tues. AERA Annual Meeting, Washington DC,
Aug. 12 - Sept. 9, 2016, Fri.-Fri. On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets),
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