About the NNAT®

What is the NNAT®?

The NNAT stands for Naglieri Nonverbal Ability Test, and is a tool used to assess the general intellectual ability of children in grades kindergarten through 12th grade. It evaluates a child's ability to reason and problem solve through nonverbal exercises. While the  NNAT-2 does not require reading, writing, or speaking to complete, the question types may be very different from any other test or schoolwork your child has experienced. If you want your child to perform at his best, you must expose him to the types of questions he will encounter. 

What is on the NNAT®?

Because the NNAT-2 helps test students for admission into K-12 gifted programs, different levels of the test are offered depending on the student's grade level. Seven different levels are available:


The NNAT-2 can be administered on paper or via computer. It consists of 48 questions, takes approximately 30 minutes to complete, and contains four question types:

Pattern Completion
As the easiest type of question to solve, pattern completion questions will be found primarily in the lower grade levels. The child will be presented with a rectangular design containing a missing piece. To solve the puzzle, the child must look at the design with a missing piece and select the answer that completes the pattern. For example: 


Reasoning by Analogy
In this exercise, the child will be presented with two or three rows of objects that comprise a matrix. The child must recognize how objects within the columns and rows change as one moves across or down the matrix. For example:

NNAT Reasoning by Analogy

Serial Reasoning

In this type of exercise, the child must recognize how the shapes in the matrix change across the rows and down the columns. As the shapes change from row to row and column to column, each shape appears only once in each row and column. For example:

NNAT Serial Reasoning

Spatial Visualization

Because spatial visualization exercises are the most difficult exercises in the NNAT, they will be found primarily in the upper grade level tests. To solve these exercises, the child must determine what two or more designs would look like if they were combined. For example: 

NNAT Spatial Visualization

How is the NNAT®-2 Scored?

The NNAT-2 is scored using the following norms: Normal Curve Equivalents by Age (NCEs); stanines, scaled scores and Naglieri Ability Index (NAI). The raw score is calculated based on the number of questions the child answered correctly. The raw score is converted to a scaled score, which is then converted to a Naglieri Ability Index (NAI) by age in three-month intervals. The NAI scores are set at a mean of 100 based on the child’s age. The lowest NAI score is 50; the highest is 150. Percentile ranks range from 1 to 99 and describe a child’s performance relative to other students in the same age group. For example, a child performing in the 99th percentile scored higher than 99% of the students in the same age group. The average rank falls between the 25th and 75th percentiles.

Helping Your Child Prepare
Naturally, you want to help your child prepare well for any test. The only effective way to prepare for a test is to become familiar with the question types and testing format. This helps to reduce or eliminate a common cause of testing anxiety – being faced with an unfamiliar style of question. Our NNAT® practice tests offer hundreds of practice questions to build your child’s critical thinking skills necessary for successful test results. Familiarizing your child with the format and question types of the NNAT®-2 will reduce testing anxiety and improve performance.

The Naglieri Nonverbal Ability Test® Second Edition/NNAT® 2 is a registered trademark of NCS Pearson Inc. Test Tutor Publishing is not affiliated with or related to NCS Pearson Inc. or its affiliates. NCS Pearson does not sponsor or endorse Test Tutor Publishing products or services. Test Tutor Publishing's products and services have not been reviewed, certified or approved by NCS Pearson.Trademarks referring to specific test providers are used by Test Tutor Publishing for nominative purposes only and such trademarks are solely the property of their respective owners.