A Keyform Ability Map is a display of the items of a rehabilitation instrument in order from "easier" items (bottom) to "harder" items (on 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.