Symbiosis is a general term denoting a relationship that can occur at all developmental levels and may involve various types of activities, needs, stimulations, gratifications, frustrations, and inhibitions. Earlier disturbance results in a more global tie of the child to the parent, later disturbance in a more focal one. In analytic therapy the symbiotic relationships are revived in the transference but not gratified. Instead, they are replaced—both through interpretation and the analyst's presence—by the analyst as a new introject neutralizing the effect of the older ones. The conception is supported by case material.