substance of abuse. The EEG differences between relapse-prone and abstinence-prone groups were found to be related to the interaction of two premorbid factors: childhood conduct disorder and paternal alcoholism. These findings receive further support from Bauer (1993) and from Prichep et al. (1996) who also found that beta activity was predictive of treatment failure. They found two clusters among cocaine addicts: One had more severe damage (alpha) and tended to remain in treatment. Those with less severe alpha excess and more beta activity tended to leave treatment. They also discovered that dropouts could not be determined from the presence of anxiety or depression or demographic variables.
