In recent years, researchers have begun to study the MMPI correlates of self-reported delinquent behavior. Self-report research has appeared promising for several reasons. It permits a clearer estimate of the dark figure of criminal and delinquent activity--those offenses which are underreported and underrecorded--and allows for comparisons of court-labeled offenders with nonlabeled offenders. It also facilitates investigation of causation and correlates among the general population. In this study, the MMPI-168 and a 21-item delinquent behavior questionnaire were administered to 1,680 high school students. The Psychopathic Deviate, Schizophrenia, and Hypomania scales of the MMPI-168 were correlated with delinquent behaviors, with and without control for the L, F, and K scales of the MMPI-168, considered separately and simultaneously. Controlling for F (a scale sensitive to aberrant behaviors) eliminated some relationships and significantly diminished the magnitude of others, while control for L and K (scales designed to identify respondent attempts to deny deviant behavior) had no significant effect. Studies of this nature that fail to control for the F type of response set may produce exaggerated or illusory results. Fourteen references are included. (Author abstract modified)