Clinical reasoning (CR) aims to examine thinking and decision processes in the course of planning speech-language interventions. In comparison, Evidence-based practice (EBP) consists of the task to transport scientific results into everyday language therapy routines. There exists a strong relationship between CR and EBP. Thus, EBP provides scientific evidence and medical guidelines to support speech and language therapists in choosing effective treatments. Moreover, EBP strengthens speech and language therapists to use their expert knowledge for solving clinical problems and to respect the preferences of the patients.