Analysis - step-by-step |
This is for 32-bit Facets 3.87. Here is Help for 64-bit Facets 4
1). Conceptualize your analytical model. Facets is based on an additive model:
observation = person ability - item difficulty - rater severity - time-point-challenge - .......
What is your additive model?
2). "Dummy facets" which aren't part of the additive model, but are required in order to investigate fit and interactions, such as, "rater gender (sex)".
Do you have any dummy facets? These will be anchored at 0 logits in the analysis, so that they don't alter the additive model.
3). Number all the facets:
1. Persons
2. Items
3. Raters
4. Time-points
5. .....
6). Within each facet, there is a list of elements:
Persons: Fred, George, Mary, ...
Items: ...
Raters: ...
7). Construct the Excel spreadsheet with one column for each facet and one column for the observation.
One facet can have range, such as 1-4, so that there are 4 columns of observations.
8). Construct the Labels= list of facets and elements.
9). Put in anchor values of 0 for the elements of the dummy facet.
10). Write the Models= specifications that match your analysis.
11). Complete the Facets specifications.
12). Run the analysis.
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.
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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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May 17 - June 21, 2024, Fri.-Fri. | On-line workshop: Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com |
June 12 - 14, 2024, Wed.-Fri. | 1st Scandinavian Applied Measurement Conference, Kristianstad University, Kristianstad, Sweden http://www.hkr.se/samc2024 |
June 21 - July 19, 2024, Fri.-Fri. | On-line workshop: Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com |
Aug. 5 - Aug. 7, 2024, Mon.-Wed. | 2024 Inaugural Conference of the Society for the Study of Measurement (Berkeley, CA), Call for Proposals |
Aug. 9 - Sept. 6, 2024, Fri.-Fri. | On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com |
Oct. 4 - Nov. 8, 2024, Fri.-Fri. | On-line workshop: Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com |
Jan. 17 - Feb. 21, 2025, Fri.-Fri. | On-line workshop: Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com |
May 16 - June 20, 2025, Fri.-Fri. | On-line workshop: Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com |
June 20 - July 18, 2025, Fri.-Fri. | On-line workshop: Rasch Measurement - Further Topics (E. Smith, Facets), www.statistics.com |
Oct. 3 - Nov. 7, 2025, Fri.-Fri. | On-line workshop: Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com |
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