This dissertation presents a body of research consisting of 5 scientific papers with an overarching objective to develop and test interventions that can enhance the dissemination, access and use of current best evidence at the point of care. Questions constantly arise from clinicians’ interactions with their patients, but more than 60% remain unanswered. The first 4 papers therefore focused on evidence dissemination to clinicians and trainees looking for answers and trying to stay alert to new evidence. We used as our “laboratory” an online tool developed at McMaster University’s Health Information Research Unit, the MacPLUS Federated Search (MacPLUS FS), which allows busy clinicians to search multiple top high quality resources simultaneously and display a 1-page output with the most clinically useful results at the top. Guided by effective models for the teaching of clinical skills at the point of care, we designed 3 web-based interventions addressing logistical and educational barriers to increase the quantity and quality of searching for current best evidence. These interventions were: (A) a web-based Clinical Questions Recorder and Reminder; (B) an Evidence Retrieval Coach composed of 8 short videos embedded in MacPLUS; (C) and a Gamified Audit & Feedback based on the allocation of “badges” and “reputation scores” for evidence searching. We tested these interventions in 4 factorial randomized-controlled trials among 1,868 heath care professionals and students currently registered in MacPLUS FS, namely: 477 medical faculty members, 431 postgraduate medical trainees, 725 nursing students and 235 medical students. Results showed that these target populations substantially differed both in their baseline frequency of search and access to alerts, as in their responsiveness to the 3 web-based interventions on evidence utilization. Evidence summaries have traditionally been tailored to meet the educational needs of clinicians, but are seldom provided in a format that supports shared decision-making. Our fifth paper explored a potential solution, which constitutes another route for evidence dissemination and use. In a project called SHARE-IT, we developed a new framework and online prototype for the generic production of decision aids, which allow physicians and patients to discuss the evidence together in the clinical encounter. We present the framework, design methods and early testing of this generic approach, which showed promising results for the translation of evidence summaries into useful tools for shared decision-making. / Thesis / Doctor of Philosophy (PhD)