Met Projected Growth has an asterisk or double dagger symbol

Document created by Community User on Oct 26, 2017Last modified by Community User on Oct 26, 2017
Version 1Show Document
  • View in full screen mode
Question
Why do some students have an asterisk (in the Combined or Comprehensive Data File) or a "double dagger" (‡) symbol (in the Achievement Status and Growth report) next to "Met Projected Growth"?

Answer
This symbol indicates that the student's projected growth lies between their observed growth +/- the observed growth standard error (SE).

 
What is a standard error and why does it matter? 

A RIT score on a test is an estimation of a student's achievement level. Many factors can cause a student's RIT score to vary slightly if we were to re-test the student. These factors include student engagement with the test, or the specific items the student saw. Therefore, RIT scores have an error range associated with them to indicate that, if the student tested again, we are confident that the student would get a score within the error range. Similarly, we have an error range for student growth.

 
How do we determine whether the student's projected growth lies within the error range? 

For example, if a student's observed growth is 10 RIT points, and their observed growth SE is 3, then we can say that they have a growth range of 7-13 points. This means that we are pretty sure that the student's actual growth is between 7 and 13 points. 
 
If the student's growth projection is 8 points, it falls within this growth range. The student's observed growth (10) is greater than their projection (8), so we determine that the student did meet or exceed their growth projection. However, since the projection is within the error range, we are less confident in this determination. In other words, if we went back in time and retested the student, we are less confident that the student would get the same result for “Met Projected Growth”. See the image below:
 
Projected growth lies within the error range

User-added image

If the student's growth projection was 15 points, then the student's observed growth (10) is less than the projection (15), so we determine that the student did not meet or exceed their growth projection. Furthermore, since the growth projection is outside the error range (7-13), we are more confident that, if we went back in time to retest the student, the result for “Met Projected Growth” would be the same. See the image below:
 
Projected growth lies outside the error range

User-added image

 
See also:


Article Number
000002802

Attachments

    Outcomes