XWIDE= columns per response = 1
The number of columns taken up by each response in your data file (1 or 2 or more). If possible, enter your data one column per response. If there are two columns per response, make XWIDE=2. If your data includes responses entered in both 1 and 2 character-width formats, use FORMAT= to convert all to XWIDE=2 format. When XWIDE=2, these control variables require two columns per item or per response code: CODES=, KEYn=, KEYSCR=, NEWSCORE=, IVALUE=. Either 1 or XWIDE= columns can be used for RESCORE=, ISGROUPS=, RESCORE= and IREFER=
See Example 11, Item responses two characters wide.
Example 1: The responses are scanned into adjacent columns in the data records,
XWIDE=1 ; Observations 1 column wide
Example 2: Each response is a rating on a rating scale from 1 to 10, and so requires two columns in the date record,
XWIDE=2 ; 2 columns per datum
CODES=010203040506070801011 ; 2 CHARACTERS FOR EACH OBSERVATION
CODES=" 1 2 3 4 5 6 7 8 91011" ; 2 CHARACTERS FOR EACH OBSERVATION
Example 3: Some responses take one column, and some two columns in the data record. Five items of 1-character width, code "a", "b", "c", or "d", then ten items of 2-character width, coded "AA", "BB", "CC", "DD". These are preceded by person-id of 30 characters.
XWIDE=2 Format to two columns per response
FORMAT=(30A1,5A1,10A2) Name 30 characters, 5 1-chars, 10 2-chars
CODES ="a b c d AABBCCDD" "a" becomes "a "
NEWSCORE="1 2 3 4 1 2 3 4 " response values
RESCORE=2 rescore all items
NAME1=1 person id starts in column 1
ITEM1=31 item responses start in column 31
NI=15 15 items all now XWIDE=2
Example 4: Scores are entered as hundreds, but are to be analyzed as incrementing by 1
XWIDE = 4
CODES = " 100 200 300 400 500 600 700 800 9001000"
STKEEP = No ; analyze the ascending scores as ordinal levels
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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|
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|April 10-12, 2018, Tues.-Thurs.||Rasch Conference: IOMW, New York, NY, www.iomw.org|
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|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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