The aim of the current study is to measure the relationship between Quality of Life,
Psychological Well-Being and Locus of Control of participants in three different conditions.
The first condition is Soilse Methadone Maintenance Programme (n=21). The second
condition is Soilse Drug-Free (n=23). The third condition is Addiction Response Crumlin
(n=23). The Hypothesis is that there will be a relationship between Quality of Life and
Psychological Well-Being in the participants in the three groups. Internal Health Locus of
Control will be measured to determine whether the participants have an internal perception of responsibility for their addiction. The results indicated a significant negative correlation between Quality of Life and Psychological Well-Being (tau=-.270,p<O.Ol,2-tailed). There was no significant difference between the conditions and Internal Health Locus of Control The findings of the study suggests, when Quality of Life is going well then Psychological well-being improves. This suggests that Quality of Life has an impact on Psychological well-being and so could serve as a predictor of Psychological Well-being in a clinical setting. The results from the Internal Health Locus of control questionnaire indicate that the participants had a high internal perception of responsibility for their addiction.