Physical Therapy

The ratings on the Tufts Assessment of Motor-Performance are subjected to a rigorous and comprehensively reported Rasch analysis conducted by Steve Haley and Larry Ludlow (1992). This discussion is parallel to Ludlow & Haley (1992), but focussed at practitioners. Particularly eye-catching in the Physical Therapy paper is a diagram that summarizes the item difficulty distribution. Each construct is represented by a line and each item by a tick mark, located at that item's difficulty. This figure presents the composition of the instrument in an immediately comprehensible and aesthetically pleasing manner. [The version shown is only an artist's impression of that in the original paper].

Haley SM & Ludlow LH. 1992. Applicability of the Hierarchical Scales of the Tufts Assessment of Motor-Performance for School-Aged Children and Adults with Disabilities. Physical Therapy, 72, 3, 191-202.

Ludlow LH & Haley SM. 1992. Polytomous Rasch Models for Behavioral Assessment: The Tufts Assessment of Motor Performance. Chapter 8 in M. Wilson (Ed.) Objective Measurement: Theory into Practice. Vol. 1. Norwood, NJ: Ablex

Artist's Impression

Partial item map of the Tufts Assessment of Motor-Performance (Ludlow & Hapey, 1992).
Items are identified by number within strand and located by logit calbration.

Physical Therapy, S Haley & L Ludlow … Rasch Measurement Transactions, 1992, 6:3 p. 241

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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