Gifted Issues Discussion homepage Forums Identification, Testing & Assessment Cogat percentile questions (bias?)

At our child's school, children that were identified at being potentially gifted were asked to take the Cogat test.

I am curious about the percentiles shown on the results. If only children who were potentially gifted take the test, does this create a bias? Is there a way to translate the Cogat percentiles to an unbiased norm?

Welcome!

CogAT percentiles are based on a huge nationwide sampling of unselected students, so these norms do compare them to the general population, not just to possible GT learners.

I know that this thread is five months old, but at my school, everyone was given the CogAT in the third grade to see who would meet qualifications for the GATE program at my school (97th%ile composite, or 98%ile in either Verbal, Nonverbal or Quantative), and aeh is right, these tests are normed to a general population.