Аннотация:In higher education, students often write an undergraduate thesis and receive one-to-one or small group support. During mentoring, 10 teachers ideally diagnose students' research skills, to be able to adapt their support to students' needs. In this study, we aimed to answer the question of how mentors apply the diagnostic phases of a diagnostic question, a diagnosis, a diagnostic check and an intervention, during mentoring meetings about 15 students' research skills. Four mentors participated in this multiple case study. Qualitative data were gathered and sixteen videotaped mentoring meetings were coded on the four diagnostic phases. The results were compared within and between mentors, showing that mentors asked several diagnostic questions, seldom articulated and shared their diagnoses explicitly with students, and mainly used interventions. We concluded that more support is needed for mentors who do not automatically use their diagnostic questions to formulate explicit diagnoses about students' research skills.
