Abstract
This article presents factors and criteria of interview in auto-confrontation with an objective of professional didactic, which we frequently conduct in our collaborative researches, when we analyze the activity. Our aim is to initiate reflections and debates about the status conferred to auto-confrontation in a process of research and about the issue answers by such method in professional training. Observing that auto-confrontation is discussing in human and social sciences as a tool of investigation, as a method or as scientific object, we try to identify dimensions that make it to be both a method of investigation and a tool of professional training. Since we explain why auto-confrontation considering in theoretical context of professional didactic constitutes a tool for professional involvement, and that, in such case, it integration in vocational training engineering is relevant.