Examined whether Psychopathology Checklist contains stable and replicable factor structure by factor-analyzing data from male prisoners (N=1,119) in Canada, United States, and England. Found two-factor solution replicated in all samples. Factor 1 defined by personality traits: superficiality; habitual lying/manipulation; callousness; lack of affect, guilt, remorse, and empathy. Factor 2 defined by chronically unstable and antisocial lifestyle. (Author/NB)