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NNAT Scores: Understand Test Results

The NNAT and NNAT3 tests are scored based on your child’s age (not grade level, even though that’s how these tests are typically administered).

Steps Used to Calculate the NNAT Score:

  • Raw Score. This is total number of questions answered correctly; since 48 questions are asked on the NNAT3, a 25/48 indicates your child correctly answered 25 questions.
  • Naglieri Ability Index (NAI). After the Raw Score is determined, it’s converted to a normalized standard score known as the Naglieri Ability Index (NAI) by comparing your child’s results against scores earned by other students born within a three-month age range. The highest possible NAI score is 160 and an average score is 100; however, NAI scores are normalized so that 68% of general education students score within the 84-116 range.
  • Percentile Rank (PR). School districts use this number to compare each student’s individual test performance against a nationwide sampling of students born within the same three-month age range. A percentile rank of 80 means that child’s score was higher than 80% of students tested nationwide, and the PR ranges from 1-99.

Since each district uses a different set of criteria to determine eligibility for admission into their gifted and talented programs, there is no standard NNAT or NNAT3 score required to qualify; instead, we recommend contacting your child’s school for more information. Detailed score reports should arrive in the mail approximately two months after your child’s tested.

 

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6 Responses

kat

My son recently scored a 94 on the NNAT. he is going into 4th grade. Our district has a cut off for GATE at 98. Doesn’t this seem unreasonably high?

edlira

My son scaled score on NNAT is 143 and the percentile is 99%. I don’t know how to interpret this scores, he is going in 6th grade. Are this good scores?

elizabeth

Seems like people here are having a hard time understanding this scoring. “Scores are normalized so that 68% of general education students score within the 84-116 range” means that it is assumed to have a normal distribution with a mean of 100 and if 68% fall within 84-116, that means a 16 point standard deviation. This is the same distribution assumed for IQ rankings, though that can be 15 or 16 points per standard deviation. A score of 132 means 2 standard deviations above the mean or at the 97.8 percentile–a score higher than 97.8% of aged peers. A score of 148 is 3 standard deviations above the mean, or at the 99.9th percentile, which is a “1 in a 1,000” situation. The same goes for scores below the mean (100), for by the same standard deviation of 16.

However, it is a very noisy test. First, it is brief, which introduces measurement error. Second, I’ve seen only a handful of questions and answers on two were ambiguous. Often extremely gifted children will “overthink”–think beyond what the test designer had in mind, and get it wrong, or stare for excessive time because the correct answer isn’t there.

oo243027

I have not taken it yet but I am FREAKING out now that this website has me that there are 48 questions!

Marcus Bruner

Thank you for reaching out to us!

The NNAT is a very complex non verbal test. We would love to help you prepare for this test! Could you please call us at 877-609-6203 and we would be happy to go over the resources we have to prepare for the NNAT!

All the best,

Marcus

juan.y.ceci.hernandez

I have a paid account but can’t find the 100 NNAT practice questions. Please advise where I can locate these.

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