Benjamin D. Wright's Annotated KeyMath Diagnostic Profile

Among Ben's favorite teaching aids is the KeyMath Diagnostic Profile, designed by Richard Woodcock at an AERA Presession on the Rasch Model in Spring 1969. Here we can see its essential features. An arithmetic test of 209 items has been Rasch-calibrated in one analysis. The items are displayed in 14 content strands (rows) with each item at its own difficulty in the overall frame-of-reference (circles above the lines). The raw scores on each strand have been positioned at their ability measures (numbers beneath the lines). Raw scores on all 209 items are shown on the "TOTAL TEST" line, positioned at their ability estimates. Ben has ringed the raw scores of a child on each strand, and some of the child's scored responses. We see a profile of the child's performance across the strands, along with unexpected successes and failures.

Key Math Diagnostic Arithmetic Test by Austin J. Connolly, William Nachtman, E. Milo Pritchett. Published June 1976 by American Guidance Service

Benjamin D. Wright's Annotated KeyMath Diagnostic Profile. B.D. Wright ... Rasch Measurement Transactions, 2012, 25:4, 1350

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: Using Rasch Models in the Social, Behavioral, and Health Sciences, George Engelhard, Jr. 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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