In this sense, has contributed to its development, expansion and maintenance: sociology, cultural anthropology, collective psychology, social psychology, field theory, factor analysis, the formal organization, sociometry, analysis interaction, the social group work, Gestalt, psychoanalysis, the movement of human potential development, psychotherapy, family, etc. And recently the third force and psicologiaa humanist. a In this sense, Tenema that these principles are: The atmosphere, the reduction of the order, the distributed leadership, flexibility, compression of the process, consensus, formulating goals and continuous assessment. a then describes each one of this principles: a) a Environment: a The group must interact in a favorable physical environment, how conducive to the type of activity that has developed. Because the environment directly influences the atmosferaa a or a climaa the group, therefore, must be arranged to contribute to participation, spontaneity and cooperation of all members. The location should not be too big or too big or too small, we have to save every detail, so that group members might be conveniently to exchange ideas, perceptions, feelings, fantasies, etc.. Face to face. a 2) a Reducing bullying.

a interpersonal relations should be friendly, cordial, frank, open, open, mutual appreciation and collaboration. The fact interact in a group, can produce feelings of fear, inhibition, hostility, and shyness, which led to intimidation or physical or psychological avoidance of some members of the group. The reduction of tensions and conflicts, fosters teamwork and productivity of the groups. Friendly interpersonal relationships, reduce the injunction and allow or provide a change in group dynamics, so conflicts or interpersonal problems become targets of the group (primary process).