﻿ DGF DIF-DPF Plot - Table 33.3

# DGF DIF-DPF Plot - Table 33.3

From the Plots menu, DGF- DIF-DPF Plot 33 produces the plotted output corresponding to Table 33.3. It shows  Differential Group Functioning (DGF) between classes of items and classes of persons.

The DGF dialog displays when Table 33 is called from the Output Tables or Plots menus.

There are six Excel plots. You have the full Excel capabilities to edit the plot, and the Excel worksheet contains the plotted numbers.

 DGF SIZE (diff.)-ip = item-person reports the relative DGF difficulty size of the item classes as points and the person classes as columns DGF t-value (diff.)-ip tests the hypothesis that the DIF sizes can be attributed to chance: t-value = DGF size / DGF size S.E. This displays the item classes as points and the person classes as columns DGF Average Score-points-ip displays the average difference between the observed score and the expected score for each response on this item CLASS by this person CLASS DGF SIZE (diff.)-pi = person-item reports the relative DGF difficulty size of the person classes as points and the item classes as columns DGF t-value (diff.)-pi tests the hypothesis that the DIF sizes can be attributed to chance: t-value = DGF size / DGF size S.E. This displays the person classes as points and the item classes as columns DGF Average Score-points-pi displays the average difference between the observed response and the expected response for each person CLASS on each item CLASS

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

The Languages of Love: draw a map of yours!

 Forum Rasch Measurement Forum to discuss any Rasch-related topic

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 Winsteps & Facets Events
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
Oct. 12 - Nov. 9, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com

Our current URL is www.winsteps.com