John Michael Linacre is the creator of WINSTEPS; the Rasch measurement software used world-wide. He also developed FACETS software, for many faceted Rasch analysis widely used in constructing objective measures from judge-mediated observations. Linacre is dedicated to creating the tools for measurement that the rest of the psychometric world relies upon when doing their work.

Dr. Linacre has consulted extensively in educational and psychological measurement, assessment and testing. 

Dr. Linacre has an M.A. in Mathematics from Cambridge University, and a Ph.D. in Psychometrics from the University of Chicago. He worked closely with Benjamin D. Wright, the leading advocate of Rasch measurement, for over 15 years as a Research Associate at the University of Chicago. 

 Dr. Linacre relocated to Australia, but continues to develop measurement software and to consult internationally on educational and psychological measurement problems. He is an adjunct Professor at the University of the Sunshine Coast. He has authored well over 100 published articles and conference papers.