WINSTEPS & Facets Rasch Software

Widely used versatile Rasch Analysis and Rasch Measurement Software

Probabilistic Measurement Models
Dichotomous Rasch Model (DRM) - 60,000 items by 10,000,000 persons
Rating Scale Model (RSM) & Extended Logistic Model - Andrich - up to 255 rating-scale categories
Partial Credit Model (PCM) - Masters - up to 255 categories per item
Grouped Rating Scale Model (GRSM)
Many-Facet Rasch Measurement - Linacre
IRT Item Response Theory One Parameter Logistic Model 1PL 1-PL - Lord & Birnbaum
Linear Logistic Test Model (LLTM), Paired-Comparison (BTL) Model
Psychometric and Educational test development
Polytomous - Polychotomous - Analysis - Andersen; Sequential Rasch Models - Glas etc.
Rasch Measurement & Fit Analysis - Wright;
Item bias, DIF and DPF Analysis, Summary Statistics, Wright Maps and more ...

  • WINSTEPS® Rasch measurement software for persons & items. Multiple-Choice (MCQ), Rating Scales (RSM), Partial Credit (PCM), with upto 255 categories per scale. Windows-native, backward compatible with BIGSTEPS. Data size: 60,000 items by 10,000,000 persons. Download free MINISTEP evaluation/student/demo version. Buy from our software sales agents, SWREG.
  • Facets Many-facet Rasch measurement (MFRM) for persons, items, judges, tasks, etc.; Linear Logistic Test Model (LLTM); Bradley-Terry-Luce Paired-Comparison Model (BTL). Download free Minifac evaluation/student/demo version. Buy from our software sales agents, SWREG

  • Kakushin

    • New! Download free scanned book "Many-Facet Rasch Measurement" (Linacre, 1994)

    • Winsteps and Facets User Manuals contain comprehensive instructions, examples and explanations for operating the software and interpreting its output

    • Get started with Winsteps and Facets Tutorial PDFs

    • For Rasch Conferences, Workshops and Training: see "Coming Events" below

    • 3rd Edn of Bond & Fox,"Applying the Rasch Model", will be published on June 16, 2015, with free software, Bond&FoxSteps3

    • Free software, Bond&FoxSteps, with Bond & Fox, 2nd Edn.,"Applying the Rasch Model".

    • Free Winsteps/Ministep Companion to Bond & Fox, 1st Edn.,"Applying the Rasch Model". Step-by-step through their examples using freeware Ministep.

    Rasch Freeware

    • Free Windows-native Ministep student/evaluation/demo version of Winsteps

    • Free Windows-native version of Minifac, the student/evaluation/demo version of Facets

    • Free BIGSTEPS, the DOS-based pre-WINSTEPS Rasch measurement program.

    • Free Facets 3.22, the last DOS-based pre-Windows version of the full Facets program.

    "continual incremental improvement"

    Other Rasch-related Resources

    Demonstration of Rasch methodology
    Rasch measurement converts dichotomous and rating scale observations into linear measures. It links qualitative analysis to quantitative methods.

    Rasch scaling is often classified under item response theory, IRT, or logit-linear models. Rasch specifies how persons, probes, prompts, raters, test items, tasks, etc. must interact statistically through probabilistic measurement models for linear measures to be constructed from ordinal observations. Rasch analysis requires the investigation and quantification of accuracy, precision, reliability, construct validity, quality-control fit statistics, statistical information, linearity, local dependency and unidimensionality. Rasch implements stochastic Guttman ordering, conjoint additivity, Campbell concatenation, sufficiency and infinite divisibility.

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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
    Rasch, Winsteps, Facets online Tutorials


    Forum Rasch Measurement Forum to discuss any Rasch-related topic

    Click here to add your email address to the Winsteps and Facets email list for notifications.

    Click here to ask a question or make a suggestion about Winsteps and Facets software.

    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 with Raters and Rating Scales: Rasch Models for Rater-Mediated Assessments, George Engelhard, Jr. & Stefanie Wind 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
    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"
    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),


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