Rational Problem Solving

Rational Problem Solving
Principle: Rasch application:
1. Problems are identified by comparing actual performance to an expected standard performance The standard of performance, the measure, is estimated from all relevant data
2. Problems are deviations in actual performance from the expected standard Discrepancies are flagged by item/person misfit and standardized residuals
3. A precise and complete description of the problem is needed to identify a solution: a) what is happening, b) where it is happening, c) when it is happening, d) to what extent it is happening Detailed quality-control fit analysis, rather than non-specific global evaluations, facilitate precise diagnosis
4. The cause of the problem will be found by comparing problem and non-problem situations. Problems rarely affect everything Comparison of available information about well-behaved and ill-behaved items/persons, and comparative analyses of subsets of substantively different items/persons point to problem sources
5. Recent problems result from some change that has caused an unwanted deviation from expectations Misfit to old measures or comparisons of old and new measures flag changes for further diagnosis
Based on R. K. Wagner (1994) Learning to solve practical problems. PERQ, 15, 2, p. 7.

Rational problem solving. Linacre JM. Rasch Measurement Transactions 1994 7:4 p.325


Rational problem solving. Linacre JM. … Rasch Measurement Transactions, 1994, 7:4 p.325



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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