Labels of facets and elements = (required)

This specification names each facet and follows it by a list of the element numbers and labels (names) to be included in the analysis.

 

Labels = (Nobuild)

Facet number ,

Facet label or name,

Anchoring,  (A,D,G,X)
+ No group reporting (N)

Estimation priority

Element number =

Element label or name,

Measure,

starting value, anchor value or group-anchor value

Group number,

for group-reporting or group-anchoring

Element weight,

defaults to 1.0

Target element number for merged elements: observations with the Element number are assigned to the Target element number

*

 

1. Labels =

Facets adds to Output Table 2 a list of the elements in the data that are not specified in Labels=.

These can be copy-and-pasted into your specification file.

Specify Labels=Nobuild to suppress producing the list of unspecified elements.

 

2. Facet Identification

 

2A. Facet numbers

Choose the order you prefer to think about your facets, and number them in that order. The number you assign to each facet will determine the order in which the facets are reported.

If your facets are persons, judges and items, you may choose:

Facet 1: judges

Facet 2: persons

Facet 3: items

 

2B. Facet Anchoring

Choose the order you prefer to think about your facets, and number them in that order. The number you assign to each facet will determine the order in which the facets are reported.

If your facets are persons, judges and items, you may choose:

Facet 1: judges

Facet 2: persons

Facet 3: items

 

Facet

Anchor/Group code

Element Specification

Description

(None)

Element number = (label), (value), Group number

Group number is used for reporting groups of elements in Table 7

A

Element number = (label), Value, (group number)

Element measure is anchored at Value. Groups reported if there is a group number.

D

Element number = (label), (value), (group number)

Element measure is anchored at Umean= value. Groups reported if there is a group number.

G

Element number = (label), Value, Group number

Each element measure is measured independently but the sum of the measures of the group of elements are constrained to equal the sum of their Values.

X

Element number = (label), Value, Group number

The same as G, but elements with extreme scores (zero, perfect) are excluded.

...N

Element number = (label), (value), (group number)

This suppresses group reporting for a facet in Table 7.  Groups are ignored for measure reporting.

Labels=

2=Persons,GN ; group-anchoring wanted, but Table 7 does not report measures for each group separately

1=Ben,0,1 ; Ben is in group 1

2=Mike,0,2 ; Mike is in group 2

......

 

Valid Numerical Ranges

Facets

1 - 255

 

Any number in the range is valid. They do not need to start at 0 or 1, nor do they need to be in sequence.

Elements

Element numbers are in the range 1 - 2,147,438,648

 

Element 0 is usually the null element number, meaning "this facet does not apply to this observation." Element 0 can be used as an element number, provided Null element= is used to change the null element number from 0 to another number.

Group numbers

0-255

0 means "no group"

Observations

0-255 (can be rescored with Rating scale=)

 

2C. Estimation priority - Ignore this for most analyses.

This allows the measures for the elements of some facets to be estimated before the elements of other facets. For instance, facets modeling interaction terms can be estimated after their main effects have been estimated.

Priority 0: do not estimate the measures. This is equivalent to anchoring (A or D).

Priority 1: estimate the measures (the default)

Priority 2: estimate the measures after the Priority 1 measures have been estimated.

Priority 3: estimate after Priority 1 and 2.

Priority 4 and higher: estimate after higher priority measures have been estimated.

 

3. Element Identification

 

See Elements.


Help for Facets Rasch Measurement Software: www.winsteps.com Author: John Michael Linacre.
 

For more information, contact info@winsteps.com or use the Contact Form
 

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
Jan. 5 - Feb. 2, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
Jan. 10-16, 2018, Wed.-Tues. In-person workshop: Advanced Course in Rasch Measurement Theory and the application of RUMM2030, Perth, Australia (D. Andrich), Announcement
Jan. 17-19, 2018, Wed.-Fri. Rasch Conference: Seventh International Conference on Probabilistic Models for Measurement, Matilda Bay Club, Perth, Australia, Website
Jan. 22-24, 2018, Mon-Wed. In-person workshop: Rasch Measurement for Everybody en español (A. Tristan, Winsteps), San Luis Potosi, Mexico. www.ieia.com.mx
April 10-12, 2018, Tues.-Thurs. Rasch Conference: IOMW, New York, NY, www.iomw.org
April 13-17, 2018, Fri.-Tues. AERA, New York, NY, www.aera.net
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
Sept. 3 - 6, 2018, Mon.-Thurs. IMEKO World Congress, Belfast, Northern Ireland www.imeko2018.org
Oct. 12 - Nov. 9, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com

 

Our current URL is www.winsteps.com

Winsteps® is a registered trademark
 

Concerned about aches, pains, youthfulness? Mike and Jenny suggest Liquid Biocell