Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

is test used to examiner nonverbal reasons and problem solving skills in children from the age of kindergarten through to grade 12. There are 38 different matrix designs which measure pattern completion, reasoning by analogy, serial reasoning and the level of spatial reasoning the child has.

NAGLIERI NONVERBAL ABILITY TEST (NNAT): "The Naglieri Nonverbal Ability Test or NNAT has been used in a variety of US state schools to assess children's problem solving skills. "

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