What do we see when we observe a psychodynamic group with adolescents? The present paper tries to put in evidence three possible observational perspectives: centered on the single-case, on the group as a totality and on the intersubjetive interactions. The three points of view do not exclude each other and, if they are integrated, new hypothesis can be opened on the interrelations between individual and group functioning. The observation represents the main tool to understand and explore the group process while working with children and adolescents. For this reason it is necessary to reflect on how this tool defines the observed field. [ABSTRACT FROM AUTHOR]