Abstract: Objective: To develop and evaluate items for inclusion in PRIDe (Preferred Role in Decision Making), a new tool to assess changes of role preference among professionals exposed to training in shared decision making (SDM).Methods: This study was part of a pilot trial to evaluate the effectiveness of SDM training on the doctors’ prescription of antibiotics for acute respiratory infections. Thirty-nine family physicians were randomized to immediate exposure to training or to delayed exposure. Potential items for PRIDe and a questionnaire about physicians’ intention to engage in SDM were administered at baseline and at follow-up.Results: Following analysis, we retained five items that captured a change in physicians’ preference. The items’ scores were pooled and the resulting tool showed limited internal consistency (Cronbach’s alpha=0.41) but significant test–retest reliability (immediate group: P=0.03; delayed group: P=0.008) and acceptable discriminant validity, with patients involved in decision making more actively after training than before (Fisher’s test, P=0.02).Conclusion: This initial step to develop an evaluation tool to assess changes in doctors’ preference of role in decision making following SDM training shows promising results. The next step is to develop more clinical vignettes followed by questions inspired from this analysis.Practice implications: The PRIDe instrument can be used in the assessment of health professionals’ attitude towards shared decision making after training in shared decision making. Additional research is needed to evaluate its validity before it can be recommended for use.