Anchor output file = " "

When Anchorfile= is specified, Facets writes out a new specification file containing the input specifications for this analysis. This file omits any specifications entered as extra specifications, but includes the final estimated measures for all elements and scales. This file also has all estimated measures marked as ",A" for "anchored".

 

These anchor values can be used as starting values for slightly different later runs. Edit the ",A"'s out of the first line of each facet in the Labels= specifications and out of the category lines of Rating (or partial credit) scale=.

 

This can also be specified from the Output Files menu, Anchor Output file.

 

Example: Using an edited version of Guilford.txt.

Anchorfile=Guilford.anc

 

Title = Ratings of Scientists (Psychometric Methods p.282 Guilford 1954)

Score file = GUILFSC        ; score files GUILFSC.1.txt, SC.2.txt and SC.3.txt produced

Facets = 3        ; three facets: judges, examinees, items

Inter-rater = 1        ; facet 1 is the rater facet

Arrange = m,2N,0f        ; arrange tables by measure-descending for all facets,

Positive = 2        ; the examinees have greater creativity with greater score

Non-centered = 1        ; examinees and items are centered on 0, judges are allowed to float

Unexpected = 2        ; report ratings if standardized residual >=|2|

Usort = (1,2,3),(3,1,2),(Z,3)        ; sort and report unexpected ratings several ways (1,2,3) is Senior, Junior, Trait

Vertical = 2N,3A,2*,1L,1A        ;define rulers to display and position facet elements

Zscore = 1,2        ;report biases greater in size than 1 logit or with z>2

Pt-biserial = measure ; point-measure correlation

Models =

?B,?B,?,RS1,1 ; CREATIVITY

*

Rating (or partial credit) scale = RS1,R9,G,O ; CREATIVITY

; Facets has renamed the rating scale in order to avoid ambiguity. Please edit the rating-scale name in the Anchorfile if you wish.

1=lowest,0,A ; this is a place-holder for the bottom category

2=,-.6441868,A

3=,-2.317694,A

4=,.8300989,A

5=middle,-1.477257,A

6=,1.710222,A

7=,-1.001601,A

8=,2.358206,A

9=highest,.5422113,A

; Rasch-Andrich Thresholds =  0, -.6441868 ,-2.317694 ,.8300989, -1.477257 ,1.710222 ,-1.001601 ,2.358206 .5422113

*

Labels =

1,Senior scientists,A

1=Avogadro,0.038439

2=Brahe,.2356183

3=Cavendish,-0.091576

*

2,Junior Scientists,A

1=Anne,-0.068648

2=Betty,.637455

3=Chris,-.2451435

4=David,-.4621402

5=Edward,.4228902

6=Fred,-.5607015

7=George,.2762882

*

3,Traits,A

1=Attack,-.2684814

2=Basis,-.1409857

3=Clarity,.2020537

4=Daring,-.2898233

5=Enthusiasm,.4972367

*

Data=

1,1,1-5,5,5,3,5,3

....

 

Example 1: Two time points and a rating scale:

 

(1) Obtain the common structure for the rating scale:

Construct the entire data set. Put in a dummy "time-point" facet with the two elements anchored at 0.

If the same person appears twice, then give them two related id-numbers, so that they are easy to pair up later. Analyze the dataset. Write out an Anchorfile=

 

(2) Time-point 1 is the "gold standard":

For the time-1 data, edit the Model= statements for element 1 of the time-point facet.

Copy-and-paste into the specification file the parts you want to anchor from the (1) anchor file.

Analyze the time-1 data and output another anchorfile.

 

(3)  Time-point 2 is measured in the Time-point 1 "frame of reference":

For the time-2 data, edit the Model= statements for element 2 of the time-point facet.

Copy-and-paste into the specification file the parts you want to anchor from the (2) anchor file.

Analyze the time-2 data.

 

Example 2: I want generate a report for each criterion entered in the analysis. I am interested in getting fair averages for the different criteria used by the raters.

1. Perform the complete analysis.

2. Output an Anchorfile=

3. In the Anchorfile=, keep everything anchored but comment out all except one criterion.

4. Analyze the Anchorfile=.

Now all the reporting will be for only that one criterion.

5. Return to 3. for the next criterion.

 

Example 3: Fair Average score for Item-by-Candidate combinations.

i.Do a standard analysis:
Facets = 3 ; Candidates, Raters, Items
Non-centered = 1 ; candidates - we need this
Model = ?, ?, ?, R
Anchorfile = anc.txt ; we need this

ii.In anc.txt,
Edit the model specification:
Model = ?, X, ?,  ....   ; inactivates the raters
Remove "Anchorfile="
Residual file = residual.xls ; Excel file - we need this

iii.Analyze anc.txt

iv.Open Residual.xls ; in Excel
Delete all columns except: Candidate, Item, Expected score
Sort the file: Candidate major, Item minor.
All the expected scores for each candidate-item combination should be the same
Used the Excel "Advanced filter" to remove duplicate lines.

v.The "expected score" is the  "Fair Average score for Item-by-Candidate"

 

 


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

The Languages of Love: draw a map of yours!

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 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

 

Our current URL is www.winsteps.com

Winsteps® is a registered trademark
 

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.