The present article discusses the group process and the social power conceptions focused by Martín-Baró. The author retakes the group conception present in Sílvia Lane's work, when it considers the personal aspects, the group characteristics, the subjective existence and objective reality and the historical character of the group. In the perspective of the social psychology, according to the author, it is much more important the analysis of the role of the power in the daily life, in the people's day by day, which implies routine events than to center it in the exceptional ones. Considering that great part of the psychologist's professional practice, mainly in a psychosocial perspective, involves the work with groups, the power issue approach starts to have a fundamental role. In this sense, the contact with Martín-Baró's production is essential and it can contribute to our daily work incisively.
group process; social power; human action; critical psychosocial approach