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WINSTEPS & Facets Widely used, versatile, well documented, with great
customer support. Winsteps now does CMLE and JMLE !! |
Winsteps or Facets? |
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Winsteps and Facets software are based on the same statistical methodology, called Rasch Analysis, but they implement it in different ways intended for different applications. Winsteps: this is designed for typical educational or survey data where a set of questions, also called "test items", is administered to a sample of persons, such as students. The questions could be multiple choice or an attitude survey. This produces a rectangle of responses where each person is a row and each column is a question. Winsteps analyzes these data to produce an "ability", "attitude" or similar measure for every person and a difficulty measure for every question, along with many other diagnostic indicators. Facets: this is designed for situations where a person's performance on a task is rated by a rater, judge, expert, teacher or even self-rated. This usually produces a 3 or more dimensional dataset which is sparse (much missing data) because not every person is rated by every rater on every task. Further, the rater may rate the student doing the task using a set of probes. This would produce a 4-dimensional dataset. The rating situation can become more complicated. For instance, when rating performance in the Arts or Sport, often the dataset has high dimensionality. As with Winsteps, measures are produced for every participant (person, rater, task, etc.) in the rating situation along with diagnostic indicators. |
Winsteps:2-D x-y, 3-D x-y Scatterplots, Wright Maps, Scree Plots, One-click through R Statistics modules | ||
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Winsteps Features |
Facets Features |
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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 32,000 rating-scale categories Partial Credit Model (PCM) - Masters - up to 32,000 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 ... |
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Practical Demonstrations of Rasch Measurement in Action |
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Education / Training |
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Rasch Ministep, Minifac and other Freeware |
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Kaizen "continual incremental improvement" |
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Other Rasch-related Resources |
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Demonstration of Rasch methodology |
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Go to Winsteps & Facets home Page
Facets Rasch measurement software.
Buy for $149. & site licenses.
Freeware student/evaluation Minifac download Winsteps Rasch measurement software. Buy for $149. & site licenses. Freeware student/evaluation Ministep download |
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Forum: | Rasch Measurement Forum to discuss any Rasch-related topic |
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Questions, Suggestions? Want to update Winsteps or Facets? Please email Mike Linacre, author of Winsteps mike@winsteps.com |
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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 |
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