Rational Problem Solving | |
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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 | ||||
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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 |
Forum | Rasch Measurement Forum to discuss any Rasch-related topic |
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Coming Rasch-related Events | |
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