[Research and professional practice in speech therapy].

The relationship between research and clinical practice is discussed based on the request of this last on new therapeutic perspectives and empirical confirmations of their decisions. Two examples of a clear and justified relation between theoretical research data and the later development of an intervention program illustrate the achievements and disappointments of these relationships. From this analysis, the proposal of evidence-based practice is discussed, the requirements involved and the difficulties in its practical application, especially in the intervention in aspects such as semantics and pragmatics. It finally points out the lack of research on an item that is considered crucial to the effectiveness of therapy: the characteristics and skills of the therapist.