Motivational Interviewing is a scientifically tested method of counseling clients and is viewed as a useful intervention strategy in the treatment of lifestyle problems and disease. It has been used and evaluated in relation to alcohol abuse, drug addiction, smoking cessation, weight loss, adherence to treatment and follow-up, increasing physical activity, and in the treatment of asthma and diabetes. Motivational interviewing has been used by various healthcare providers, including, psychologists, doctors, nurses and midwives.
The link below provides a meta-analysis and review showing motivational interviewing in a scientific setting effectively helps clients change their behavior and that it outperforms traditional advice-giving in approximately 80% of the studies. When using motivational interviewing in brief encounters of 15 minutes, 64% of the studies showed an effect. Further research is needed to determine the best approach to training and implementation as the methods of motivational interviewing are adopted more broadly into clinical practice.