Institute for Objective Measurement, Inc.
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Welcome to the website of the IOM! We offer you information on a wide variety of measurement programs and services. Please click below on as many selections as you would like.

Research Papers, Notes and Reports (full text)
including "Measurement Essentials", "Popular Measurement"
Book Sales
Rasch Measurement SIG (AERA): Rasch Measurement Transactions
Rasch Software: Freeware and Paid Rasch-friendly Journals
Mission Vision (under review) Definition of Measurement Board of Directors
Publications Certification (undex review) Conferences
Speakers Bureau Directory of Consultants To Reach Us Other Places To Look
Best Test Design and Rating Scale Analysis are now available for free download!!!
Best Test Design Rating Scale Analysis
Publisher PDF (181MB) Publisher PDF (198MB)
Standard PDF (81MB) Standard PDF (81MB)
Reduced PDF (26MB) Reduced PDF (26MB)

Coming Rasch-related Events
Feb 26 - June, 2018Online Advanced course in Rasch Measurement Theory (D.Andrich), University of Western Australia, Perth, Australia,
March 23, 2018, Fri.12th Annual UK Rasch User Group Meeting, Loughborough University, Loughborough, England,
April 10-12, 2018, Tues.-Thurs. Rasch Conference: IOMW, New York, NY,
April 13-17, 2018, Fri.-Tues. AERA, New York, NY,
May 22 - 24, 2018, Tues.-Thur. EALTA 2018 pre-conference workshop (Introduction to Rasch measurement using WINSTEPS and FACETS, Thomas Eckes & Frank Weiss-Motz),
May 25 - June 22, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps),
June 27 - 29, 2018, Wed.-Fri. Measurement at the Crossroads: History, philosophy and sociology of measurement, Paris, France.,
June 29 - July 27, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps),
July 25 - July 27, 2018, Wed.-Fri. Pacific-Rim Objective Measurement Symposium (PROMS), (Preconference workshops July 23-24, 2018) Fudan University, Shanghai, China "Applying Rasch Measurement in Language Assessment and across the Human Sciences",
July 29 - August 4, 2018 Vth International Summer School `Applied Psychometrics in Psychology and Education`, Institute of Education at the Higher School of Economics, St. Petersburg, Russia,
Aug. 10 - Sept. 7, 2018, Fri.-Fri. On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets),
Sept. 3 - 6, 2018, Mon.-Thurs. IMEKO World Congress, Belfast, Northern Ireland,
Oct. 12 - Nov. 9, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps),