This study examined the effectiveness of an occupational therapy intervention to facilitate intrinsic motivation in individuals with psychiatric illness who had motivational deficits. The clinical problem, motivational deficits, was referred to the passive or coercive behaviors resulting from cumulative psychosocial frustrations. The intervention was based on a motivational frame of reference developed by the researcher, involving strategies of autonomy support and moderate structure. The research design was a mixed-effects nested design, involving one experimental group and one control group, and two different groups of therapists to carry out the two types of treatment. The treatment was carried out in one-hour, twice-a-week individual therapy sessions for 12 weeks. The results showed that the motivational intervention effectively facilitated intrinsic motivation, and that there was a corresponding change in social behavior observed by independent therapists. It was concluded that the motivational frame of reference has potential to be used in occupational therapy practice, and further research is needed to investigate its long-term effects.
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