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
|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
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