The Kaufman Brief Intelligence Test (KBIT) is a short, individually administered test of intelligence designed for ages 4 to 90 years. The test was created in 1990 by Drs. Alan and Nadeen Kaufman, two psychologists known for their work on intelligence and achievement testing, and achieved widespread use and favorable test reviews. In 2004, the KBIT-2, a revised and restandardized version of the 1990 KBIT, was released. The KBIT-2, the focus of this entry, measures both verbal and nonverbal intellectual functioning (crystallized and fluid abilities) and can be administered within 15 to 30 minutes.