I'm not familiar with MAP testing - can you get a standard score or something other than a percentile, and can you get a range of error along with it?
There is a lot of information about Measures of Academic Progress (MAP) assessments by Northwest Evaluation Association (NWEA), and their RIT (Rasch unIT or Rasch Interval uniT) scores, on the company website and archives at
nwea.org. Content changes frequently.
It is my understanding that the RIT score indicates the point in the curriculum at which the child answers 50% of the questions correctly, therefore does not indicate mastery, and is intended to pinpoint each child's zone of proximal development (ZPD). However this is predicated on learning material and developing skills in the curriculum's prescribed order (or learning continuum)... which not all children do.
There are also RIT growth targets.
Stagnation may result from a ceiling effect... not teaching a student new things, or may indicate a benign "gap" which would not preclude the individual from having a solid foundation and learning other skills seamlessly, or may indicate some type of learning difference or learning disability and may need to be explored further.
