Keyform plot

See also Tables 37, 38, 39, 40, 41 - Person Keyforms

 

From the Plots menu, Keyforms are self-measuring and diagnosing forms, such as the KeyMath diagnostic profile, and the KeyFIM. These are a powerful application of Rasch measurement for instantaneous use. These are plotted in horizontal or vertical format using Excel - but be patient, Excel is somewhat slow to display them. The Keyform can be plotted with either horizontal or vertical orientation. In earlier version of Winsteps, these were specified by KEYFORM=

 

The 7 columns in the Excel Worksheet are:

 

For points in the Keyform:

COLUMN The horizontal location (x-axis) in the vertical layout or vertical location (y-axis) in the horizontal layout.

MEASURE The measure (y-axis) in the vertical layout or (x-axis) in the horizontal

POINT-LABEL The value with which to label the point. Use the Excel point-label add-in at www.winsteps.com/ministep.htm

 

For column (row headings)

COLUMN The horizontal location (x-axis) in the vertical layout or vertical location (y-axis) in the horizontal layout.

HEAD-MEASURE The top-of-column measure (y-axis) in the vertical layout or end-of-row (x-axis) in the horizontal

ITEM-ID  The item number

ITEM-LABEL The item identifying label

 

Example: For the first 3 items of the "Liking For Science" Data

with Excel, produces vertical plots like: (These can be plotted directly from the Plots menu.)

 

 

with Excel, produces horizontal plots like: (These can be plotted directly from the Plots menu.)

 

 


 

Adding person-measure-related information to the Keyform plot:

1.Run Winsteps, "Plots", "Vertical Keyform". This gives you am Excel plot with raw scores down the right-hand side.

2.Click on the Excel worksheet tab (usually below the plot).

3.The "raw scores" are in a block below the items.

4.Insert more blank rows below the raw score block (and above the next block) the same as the raw score block with a blank row each side.

5.Copy the raw score block into the inserted rows, with a blank row beneath the raw score block and a blank row above the next block.

6.Add 2 to the highest value in column A and put this value in column A of your new block.

7.Replace the raw score in your new block with the information you want for each raw score

8.The plot should now show the person information to the right of the raw scores.


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

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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
Winsteps Tutorials Facets Tutorials Rasch Discussion Groups

 


 

 
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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