Wide Range Achievement Test - 3

Wide Range Achievement Test WRAT - 3. Stone MH, Jastak S, Wilkinson G. … 1995, 8:4 p.403

The "WRAT3 Item Map and Absolute Scale" shown overleaf (in printed text) is the result of Rasch analysis and variable construction by Mark Stone. These rulers, marked linearly in rescaled logits, show both criterion- and norm-referencing. The word "Discretionary" gives meaning to a measure of 515 on the "Reading" ruler and corresponds to the average level of 9th graders and 14-year-olds. Three separately calibrated rulers are displayed. Not only are these rulers useful for communicating the meaning of measures and diagnosing performance, but they are also useful for reminiscing about one's education!

According to WRAT-3 distributors, Jastak Assessment Systems, "The Wide Range Achievement Test, developed by Sarah Jastak and Gary Wilkinson, continues the pioneering work of Dr. Joseph Jastak to develop the most effective tool to study the development of reading, spelling, and arithmetic codes. The WRAT-3 features a standardization using a national stratified sampling model, all new grade ratings, and scaling and item analyses by the Rasch method."

Please see Psychological Assessment Resources for more information on the WRAT.

Wide Range Achievement Test - 3. Stone MH, Jastak S, Wilkinson G. … Rasch Measurement Transactions, 1995, 8:4 p.403

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Rasch Models: Foundations, Recent Developments, and Applications, Fischer & Molenaar	Probabilistic Models for Some Intelligence and Attainment Tests, Georg Rasch	Rasch Models for Measurement, David Andrich	Constructing Measures, Mark Wilson	Best Test Design - free, Wright & Stone Rating Scale Analysis - free, Wright & Masters
Virtual Standard Setting: Setting Cut Scores, Charalambos Kollias	Diseño de Mejores Pruebas - free, Spanish Best Test Design	A Course in Rasch Measurement Theory, Andrich, Marais	Rasch Models in Health, Christensen, Kreiner, Mesba	Multivariate and Mixture Distribution Rasch Models, von Davier, Carstensen
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Introduction to Many-Facet Rasch Measurement (Facets), Thomas Eckes	Rasch Models for Solving Measurement Problems (Facets), George Engelhard, Jr. & Jue Wang	Statistical Analyses for Language Testers (Facets), Rita Green	Invariant Measurement with Raters and Rating Scales: Rasch Models for Rater-Mediated Assessments (Facets), George Engelhard, Jr. & Stefanie Wind	Aplicação do Modelo de Rasch (Português), de Bond, Trevor G., Fox, Christine M
Exploring Rating Scale Functioning for Survey Research (R, Facets), Stefanie Wind	Rasch Measurement: Applications, Khine	Winsteps Tutorials - free Facets Tutorials - free	Many-Facet Rasch Measurement (Facets) - free, J.M. Linacre	Fairness, Justice and Language Assessment (Winsteps, Facets), McNamara, Knoch, Fan

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