About
Rasch Measurement Theory was used to convert assessment items and responses into keyform ability maps. These maps can be used to help clinicians set short-term and long-term rehabilitation goals and develop optimal treatment interventions!
Gross Motor Unit Measure - measure gross motor development with as few as 4 items!
What is a Keyform Ability Map?
A Keyform Ability Map is a display of the items of a rehabilitation instrument in order from "easier" items (bottom) to "harder" items (o n top). Based on empirical evidence, there will be a higher probability of receiving higher scores on easy items (green) and lower scores on harder items (red). The "transition zone" where the scores fluctuate between higher and lower scores (green to yellow to red), indicates the ability level of the client. This also represents the just-right-challenge area. Rehabilitation therapists can use items in this transition zone as a basis for setting short-term and long-term goals and developing optimal treatment interventions.
What is the Gross Motor Unit (GMU) Measure?
The GMU Measure is a brief, dichotomously-scored (pass/fail) gross motor development instrument with a 100 point scale. The resultant GMU measure indicates how far a child is from lying supine and walking unsupported. The scale and measurement system is based on a construct specification equation that explains 87% variance in gross motor development (Seamon, et. al. 2024). Testing a child with as few as 4 GMU Measure items produces a keyform ability map and measure that depicts the child’s gross motor ability along the continuum of gross motor development.
Learn about Item Response Theory (IRT)
