Disjoint strings of responses

When the responses are not arranged in one continuous string in the record, instruct Winsteps to skip over or ignore the gaps.


Example: The 18 item string is in columns 40 to 49 and then 53 to 60 of your data file. The person-id is in columns 11-30. Data look like:

xxxxxxxxxxPocahontas Smith, Jrxxxxxxxxx1001001110xxx11001110


Method a: Delete unwanted "items" in columns 50, 51, 52 using an item delete file, IDFILE=.

  NAME1 =11 in original record

  NAMLEN=20 length in original record

  ITEM1 =40 in original record

  NI    =21 include deleted items

  IDFILE =DEL5052 file of deletions

 The contents of DEL5052 are:

  11 - 13  Cols 50-52 are items 11-13


Method b: Rescore "items" in columns 50, 51, 52 as missing values with RESCORE=.

  NAME1 =11  in original record


  ITEM1 =40

  NI    =21  include rescored items

  RESCORE=000000000011100000000 rescore 50-52

  CODES =01  (the standard)

  NEWSCORE=XX  non-numerical characters specify "missing"


Method c: Make the items form one continuous string in a new record created with FORMAT=. Then the item string starts in the 21st column of the new record. Reformatted record looks like: Pocahontas Smith, Jr100100111011001110

  FORMAT=(T11,20A,T40,10A,T53,8A) reformatting

  NAME1 =1  in the formatted record

  ITEM1 =21  in the formatted record

  NI    =18  the actual number of items

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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
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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