KEYSCR= reassign scoring keys = 123..

This is only needed for complicated rescoring.

 

Specifies the score values assigned to response choices which match KEY1= etc. To assign responses matching key to the "missing" value of -1, make the corresponding KEYSCR= entry blank or some other non-numeric character.

 

When XWIDE=1, each value can only take one position, so that only KEY1= through KEY9= can be reassigned. KEY10= through KEY99= can also be used but keep their standard values of 10 through 99.

 

When XWIDE=2, each value takes two positions, and the values corresponding to all keys, KEY1= through KEY99=, can be reassigned.

 

Example 1: Three keys are used, and XWIDE=1.

 Response categories in KEY1= will be coded "1"

 Response categories in KEY2= will be coded "2"

 Response categories in KEY3= will be coded "3"

   KEYSCR=123 (standard)

 

Example 2: Three keys are used, and XWIDE=1.

 Response categories in KEY1= will be coded "2"

 Response categories in KEY2= will be coded "1"

 Response categories in KEY3= will be coded "1"

   KEYSCR=211

 

Example 3: Three keys are used, and XWIDE=2

 Response categories in KEY1= will be coded "3"

 Response categories in KEY2= will be coded "2"

 Response categories in KEY3= will be coded "1"

   KEYSCR=030201

 or

   KEYSCR=" 3 2 1"

 

Example 4: Three keys are used, and XWIDE=1

 Response categories in KEY3= will be coded "1"

 Response categories in KEY6= will be coded "missing"

 Response categories in KEY9= will be coded "3"

   KEY3=BACDCACDBA response keys

   KEY6=ABDADCDCAB

   KEY9=CCBCBBBBCC

   KEYSCR=xx1xxXxx3 scores for keys

 The "x"s correspond to unused keys, and so will be ignored.

The "X" corresponds to specified KEY6=, but is non-numeric and so will cause responses matching KEY6= to be ignored, i.e. treated as missing.

 

Example 5: Some items in a test have two correct answers, so two keys are used. Since both answers are equally good, KEY1= and KEY2= have the same value, specified by KEYSCR=. But some items have only one correct answer so in one key "*", a character not in CODES=, is used to prevent a match.

   CODES=1234

   KEY1 =23313141324134242113

   KEY2 =31*324321*3142314*** ; * is not in CODES=

   KEYSCR=11 both KEYs scored 1

 

Example 6: More than 9 KEYn= lines, together with KEYSCR=, are required for a complex scoring model for 20 items, but the original data are only one character wide.

 

Original data: Person name:  columns 1-10

 20 Item responses: columns 21-40

 

Looks like: M. Stewart..........1321233212321232134

 

Solution: reformat from XWIDE=1 to XWIDE=2

 

 TITLE="FORMAT= from XWIDE=1 to =2"

 FORMAT=(10A1,10X,20A1) ; 10 of Name, skip 10, 20 of responses

 NI=20

 NAME1=1

 ITEM1=11   Responses in column 11 of reformatted record

 XWIDE=2

 CODES="1 2 3 4 "  Original response now "response blank"

 KEY1 ="1 2 1 3 2 1 2 3 1 4 3 2 1 1 1 1 1 2 1 1 " Keying 20 items

 KEY2 ="2 1 2 1 1 2 1 1 2 1 1 1 2 3 3 2 2 * 2 1 "

 ....

 KEY10="3 3 3 2 3 3 4 2 3 * * * 4 4 4 4 4 4 4 4 "

 KEYSCR="1 2 3 2 2 2 3 4 1 4 " ; Renumbering 10 KEYn=

 &END


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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
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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

 

 

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