Levels of hostility and type of crime committed were compared in 94 male offenders with either 3-4 or 4-3 Minnesota Multiphasic Personality Inventory (MMPI) high point pairs and in 94 randomly selected offenders without these codes who were matched for race with the 3-4/4-3 group. The samples were drawn from all male offenders entering a state prison system over 5 years. Self-report measures included the MMPI, Buss Durkee Hostility Inventory, and Monroe Dyscontrol Scale. Multivariate and univariate analyses showed that those with 3-4 codes did not differ from those with 4-3 codes. Except for higher scores on Megargee's Overcontrolled-Hostility scale, the combined 3-4/ 4-3 offenders either did not differ from or scored lower than the comparison group on type of crime and all self-report measures of hostility, anger, episodic dyscontrol, and violence. Neither these results nor the majority of research on 3-4/4-3 profiles supports these codes as evidence of a proclivity for violence.In their discussions of the 3-4/4-3 two-point code of the Minnesota Multiphasic Personality Inventory (MMPI; Hathaway & McKinley, 1983), various interpretive guides suggest that individuals with the 3-4 code often demonstrate clear differences in behavior from those with the 4-3 code. Although chronic anger and hostility seem to characterize people with either the 3-4 or 4-3 code, distinctive differences have been reported in how these two code types behaviorally manifest their anger. Persons with the 4-3 code tend to express their anger outwardly in episodic bursts of aggressive, violent acting out, whereas individuals with the 3-4 code tend to exhibit more passive and indirect expressions of their anger. Those with the 4-3 code often are incarcerated for their violent acts, and prisoners with this code are likely to have histories of violent, assaultive crimes (Friedman, Webb, &Lewak, 1989;Graham, 1987;Greene, 1980).Code types on the MMPI-2 appear to be highly consistent with those obtained on the original MMPI (Graham, Timbrook, Ben-Porath, & Butcher, 1991). As a result, recent interpretive manuals for the MMPI-2 follow the earlier guides in reporting similar behavioral differences in anger expression among individuals with the 4-3 code as contrasted with those with the 3-4 code (Graham, 1990;Greene, 1991). Butcher and Williams (1992), however, do not draw distinctions between 3-