PDFILE= person deletion file

Deletion or selection of persons from a test to be analyzed, but without removing their responses from your data file, is easily accomplished by creating a file in which each line contains the sequence number of a person or persons to be deleted or selected (according to the same rules given under IDFILE=), and then specifying this file by means of the control variable, PDFILE=, or enter the deletion list in the control file using PDFILE=*. PDFILE=filename can be action from the Specification menu dialog box. See also PDELETE=.

 

PDFILE= file name

file containing list of person entry numbers to be deleted or reinstated.  Each line in the file is in the PDELETE= format.

PDFILE = ?

opens a Browser window to find the file

PDFILE = *

in-line list in the control file

PDFILE=* 4 18-23 *

At the Extra Specifications prompt

PDFILE=

In the Specifications Menu dialog box, reinstates all temporary deletions

 

Example 1: You wish to delete the fifth and tenth persons from this analysis.

1. Create a file named, say, "PERSON.DEL"

  2. Enter into the file, the lines:

5

10

3. Specify, in the control file,

PDFILE=PERSON.DEL

 

 or, enter directly into the control file,

   PDFILE=*

   5

   10

   *

 

Example 2: The analyst wants to delete the most misfitting persons reported in Table 6.

1. Set up a standard control file.

2. Specify

PDFILE=*

*

3. Copy the target portion of Table 6.

4. Paste it between the "*"

5. Delete characters before the entry numbers.

6. Type ; after the entry numbers to make further numbers into comments.

 

Example 3:

TITLE = 'Example of person deletion list from Table 6'

PDFILE = *

 Delete the border character before the entry number

; ENTRY   RAW                          INFIT     OUTFIT              

;   NUM  SCORE COUNT MEASURE  ERROR MNSQ  ZSTD MNSQ  ZSTD PTBSE  PUP 

   73   ; 21    22      .14     .37  .95   -.3 1.03    .2 B-.19  SAN 

   75   ; 16    22     -.56     .39  .95   -.3 1.03    .2 C-.19  PAU 

        Enter the ; to make other numbers into comments

*    ; closure of PDFILE=*

 

Example 4: My sample is large enough (n>2000). I want to exclude in the analysis the persons and items that have infit or outfit statistics of less than -2 or greater than +2.

 

1. Perform your analysis.

2. Output files menu: PFILE to Excel.

3. In Excel sort the persons in Outfit ZSTD order.

4. Delete all person rows you want to keep in your analysis.

5. Copy the column of entry numbers of persons you want to delete.

6. Create a new text file "delete.txt"

7. Paste the list of entry numbers into the text file

8. In your Winsteps control file, add

PDFILE = delete.txt

9. Perform your revised analysis


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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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