BACKGROUND: Shared decision making is a crucial component of evidence-based practice, but a lack of training in the "how to" of it is a major barrier to its uptake. OBJECTIVE: To evaluate the effectiveness of a brief intervention for facilitating shared decision making skills in clinicians and student clinicians. DESIGN: Multi-centre randomized controlled trial. PARTICIPANTS: One hundred and seven medical students, physiotherapy or occupational therapy students undertaking a compulsory course in evidence-based practice as part of their undergraduate or postgraduate degree from two Australian universities. INTERVENTION:The 1-h small-group intervention consisted of facilitated critique of five-step framework, strategies, and pre-recorded modelled role-play. Both groups were provided with a chapter about shared decision making skills. MAIN MEASURES: The primary outcome was skills in shared decision making and communicating evidence [Observing Patient Involvement (OPTION) scale, items from the Assessing Communication about Evidence and Patient Preferences (ACEPP) Tool], rated by a blinded assessor from videorecorded role-plays. Secondary outcomes: confidence in these skills and attitudes towards patient-centred communication (Patient Practitioner Orientation Scale (PPOS)). KEY RESULTS: Of participants, 95 % (102) completed the primary outcome measures. Two weeks post-intervention, intervention group participants scored significantly higher on the OPTION scale (adjusted group difference=18.9, 95 % CI 12.4 to 25.4), ACEPP items (difference=0.9, 95 % CI 0.5 to 1.3), confidence measure (difference=13.1, 95 % CI 8.5 to 17.7), and the PPOS sharing subscale (difference=0.2, 95 % CI 0.1 to 0.5). There was no significant difference for the PPOS caring subscale. CONCLUSIONS: This brief intervention was effective in improving student clinicians' ability, attitude towards, and confidence in shared decision making facilitation.Following further testing of the longer-term effects of this intervention, incorporation of this brief intervention into evidence-based practice courses and workshops should be considered, so that student clinicians graduate with these important skills, which are typically neglected in clinician training. INTRODUCTIONWhile various definitions abound, the core tenets of shared decision making include: a two-way exchange of information between the patient and clinician, discussion and deliberation of the possible options and their outcomes, and the clinician and patient both participating in the decision making process and arriving at a decision. 1 Successful evidence-based practice requires clinicians to incorporate patient values and preferences and utilise shared decision making. 2 Indeed, shared decision making can be viewed as a prerequisite to evidencebased practice. 3 However, shared decision making has not been routinely adopted by health professionals. There are barriers to its implementation. 4 One barrier is simply the lack of teaching clinicians the "how to". Recent commentaries about shared de...