To lessen the size of its data file, Facets permits two types of compression in its data format:
A. Observations in sequence. Observations are often ordered by element sequence number on one facet, e.g., item number, without alteration to the other facets, e.g., examinee number and judge number. Such observations can be recorded as a range, e.g.,
12,1,3,101,4 ; person 12 on item 1 by judge 101 is rated a "4"
12,2,3,101,3 ; person 12 on item 2 by judge 101 is rated a "3"
12,3,3,101,5 ; person 12 on item 3 by judge 101 is rated a "5"
; item 4 not observed here
12,5,3,101,2 ; person 12 on item 5 by judge 101 is rated a "2"
can be entered in the Facets data file with a range of element numbers on only one facet:
12,1-5,101,4,3,5,,2 ; person 12 on items 1-5 by judge 101,
rated "4","3","5",Missing here,"2"
B. Identical replications. In survey analysis, many identical replications may appear, e.g.,
2,7,2 ; a respondent in ethnic group "2" and age group "7" responded 2
2,7,2 ; another in ethnic group "2" and age group "7" responded 2
2,7,2 ; a 33rd person in ethnic group "2" and age group "7" responded 2
can be entered in the Facets data file as
R33,2,7,2 ; 33 respondents in ethnic group "2" and age group "7" responded 2
C. Identical replications observed in sequence. An element number range and a replication count can be used simultaneously:
R33,2,7,4-6,2,3,1 ; 33 respondents in ethnic group "2" and age group "7" answered items 4,5,6 with "2", "3", "1"
Help for Facform Rasch Measurement Software: www.winsteps.com. Author: John Michael Linacre
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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
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|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 Winsteps & Facets Events|
|May 22 - 24, 2018, Tues.-Thur.||EALTA 2018 pre-conference workshop (Introduction to Rasch measurement using WINSTEPS and FACETS, Thomas Eckes & Frank Weiss-Motz), https://ealta2018.testdaf.de|
|May 25 - June 22, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|June 27 - 29, 2018, Wed.-Fri.||Measurement at the Crossroads: History, philosophy and sociology of measurement, Paris, France., https://measurement2018.sciencesconf.org|
|June 29 - July 27, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com|
|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" www.promsociety.org|
|Aug. 10 - Sept. 7, 2018, Fri.-Fri.||On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com|
|Oct. 12 - Nov. 9, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|John "Mike" L.'s Wellness Report:
I'm 72, take no medications and, March 2018, my doctor is annoyed with me - I'm too healthy!|
According to Wikipedia, the human body requires about 30 minerals, maybe more. There are 60 naturally-occurring minerals in the liquid Mineral Supplement which I take daily.