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NAB® Categories Test

Robert A. Stern, PhD, and Travis White, PhD

Evaluates an individual's cognitive flexibility and concept formation
Paper and pencil, E-Manual, Download
Age range:
18 years to 97 years
10–15 minutes
Qualification level:
All qualifications for Level B plus an advanced professional degree that provides appropriate training in the administration and interpretation of psychological tests, or license or certification from an agency that requires appropriate training and experience in the ethical and competent use of psychological tests. Close

Also available! Our In-Person e-Stimulus Books/Panel Cards and Kits are convenient, more hygienic alternatives to paper administration that allow you to administer the NAB face-to-face via tablet. Be sure to download our white paper prior to administering.


The NAB Categories Test is a classification and categorization task designed to evaluate concept formation, cognitive response set, mental flexibility, novel problem solving, and generativity. Unlike many existing instruments, the measure incorporates both visual and verbal information, resulting in richer data about the examinee’s response style and abilities.