Published online by Cambridge University Press: 29 January 2018
Two measures of extraversion were administered routinely to a group of drug dependent offenders, on admission, after six months and after one year's treatment in a therapeutic community. On admission the sample was relatively introverted. During the treatment there was a progressive move towards extraversion, and after one year's residence there was a significant change in the direction of extraversion. It is suggested that this change constitutes an important factor in the success of this type of treatment.
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