Task-sharing approaches that train non-specialist providers (NSPs), people without specialized clinical training, are increasingly utilized to address the global mental health treatment gap. This review consolidates findings from peer reviewed articles on the impact of task-sharing mental health interventions on NSPs at the individual, family and community level. Studies that highlighted facilitators, barriers and recommendations for improving the experiences of NSPs were also included in the review. Fifteen studies, conducted across eight countries, met the inclusion criteria. Seven studies were conducted in Sub-Saharan Africa, six in South and Southeast Asia and two studies were conducted in high-income countries in Europe. Benefits for NSPs included personal application of mental health skills, elevated community status and increased social networks. Challenges include burnout, lack of career progression and difficult workplace environments. Findings indicate that while there were many positive impacts associated with NSPs’ work, challenges need to be addressed. Safety and harassment issues reported by female NSPs are especially urgent. Supervision, certifications, increased salaries and job stability were also recognized as significant opportunities. We recommend future intervention studies to collect data on the impact of intervention delivery on NSPs. Research is also needed on the impact of various supervision and health systems strategies on NSPs.

Background: While Motivational Interviewing (MI) is effective in reducing client problem behaviours, including health-related behaviours, there is little evidence about how MI training enhances practitioner skills. Aims: The current pilot study addressed this lack by training two health practitioners (Diabetes Nurse Educators) in MI, and evaluated the effect of MI training on both practitioner and patient behaviour when MI was delivered in a clinical settting, with patients experiencing difficulties with diabetes self-management. Methods: Comparisons were made between the practitioners’ skills in a baseline condition (Patient Education; PE) and after training in Motivational Enhancement Therapy (MET), a four-session form of MI. At the same time, the effects of the two interventions on patient in-session behaviour were compared. Practitioner and patient data were obtained from transcripts of all PE and MET sessions, which were independently coded using Motivational Interviewing Skills Code therapist and client behaviour counts. Results: Compared with their baseline performance, practitioners, when trained to practice MET, behaved in ways consistent with MI, and this appears to have evoked beneficial in-session behaviour from the patients. Conclusions: These results suggest that the MI training was effective.