Category Probability Curves |
This is for 32-bit Facets 3.87. Here is Help for 64-bit Facets 4
Click on "Category Probability Curves", also called Item Response Curves, IRCs
Select by clicking on "Probability Cat. Curves". Buttons are described in Graph window.
This shows the probability of observing each ordered category according to the Rasch model. To identify a category, click on it.
The caption can be clicked on and moved. "2" is the category score. "25% independent" is the category description from Rating Scale=. To clear the black highlighting, click somewhere else on the plot.
To delete the line corresponding to a category, double-click on it.
Poisson Curves
The Rasch-Poisson model has an infinity of categories. Facets computes 256 categories. Consequently measures are biased for observed categories above 200.
Help for Facets Rasch Measurement and Rasch Analysis Software: www.winsteps.com Author: John Michael Linacre.
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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