When the Q scores of delinquent and normal groups are compared, the differences are reliable and highly significant. Participants who are less inhibited, obstinate and perseverative had difficulty with each new presentation of the maze test. They often repeated their original, incorrect route, often saying they knew that the particular route was incorrect. Administered regardless of native language, disability status and to literacy. In most cases their scores were low. Subjects unused to tests required additional training in the test-taking procedure.