126 men from a Disciplinary Barracks who tested below an MA of 11 on the Shipley-Hartford (S-H) Scale were given the Wechsler-Bellevue (W-B) Scale. The results indicate that the total MA obtained from the S-H Scale is lower than would be secured from an individual scale such as the W-B. The mental age secured from the S-H Scale "cannot be interpreted as a valid mental age, particularly for individuals in the lower half of the intelligence distribution." (PsycINFO Database Record (c) 2006 APA, all rights reserved)