The article discusses the need to deal with physician-patient relations at the affective level, which requires models for humanization of care during undergraduate medical training. In 2003, the UNI-FESP School of Medicine launched a course on Observation of Medical Practices as part of the regular curriculum for first-year medical students. The observation was followed by discussion of experiences with lectures, reflection, and debate with medical faculty from various specialties. The aim of the study was to assess the immediate and long-term impact of the course on the 30 first to third-year undergraduates (10 students per year), using a quantitative (5 multiple-choice questions) and qualitative questionnaire (3 open questions, categorized after analysis and consensus between the two authors). The authors concluded that the course allowed presentation of medical practices to the early medical undergraduates, who had little previous contact with this reality. Over the course of the years, a change was observed in the students' perception of Observation of Medical Practice: students in the initial years tended to value emotional support for patients, while as the years went by the undergraduates focused more on the knowledge in their field of learning and their future professional work