Examined the two-year test-retest reliability of the Psychopathy Checklist-Revised (R. Hare, 1991)(PCL-R) in 200 men and 25 women methadone patients. Stability of the PCL-R was generally good, but the measure was somewhat more reliable as a continuous measure than a dichotomous measure. (SLD)

An increasingly important consideration in drug abuse policy and programming is the growing number of multiple substance abusers, i.e., problem-drinking drug addicts. A longitudinal study of two drug addict populations examined drug and alcohol usage, psychological variables, and criminal justice and employment indicators. Findings indicated that…

Recent advances in the study of life stress and social support suggest a new approach to the drug abuse client recidivism problem which encompasses the need for naturalistic, interactional studies. A longitudinal study was conducted with 49 ex-clients of a heroin detoxification program to test the hypothesis that experiencing life stress in the…

Whether methadone maintenance treatment demonstrates cumulative (rehabilitative) or stabilizing effects on behavior of narcotics addicts over multiple treatment episodes was studied involving 993 addicts in a quasi-experimental design. Observed behavioral changes and longitudinal self-reports indicate stabilizing, but not cumulative, effects. (SLD)