The Naglieri Nonverbal Ability Test®Second Edition/NNAT®2 is a tool used to assess the general intellectual ability of children in grades kindergarten through 12th grade. 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.