- Is satisfaction with community-based mental health services contingent upon patients' pre-treatment morale? To examine this question, we analyzed data collected as part of a randomized clinical trial examining peer support services for people with severe mental illness. Participants were randomly assigned to a consumer partner, nonconsumer partner, or control, no-partner condition. In the control and nonconsumer partner conditions, participants' elevated self-esteem, embedded in a higher-order "morale" factor, predicted an increase in satisfaction with services, whereas in the consumer partner condition, it did not. Moreover, high-morale participants in the consumer partner condition reported lower satisfaction with services as compared with high-morale control participants. Findings elucidate the centrality of treatment-aptitude interactions in partnership-based psychiatric rehabilitation.