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The attachment and social rank systems are biological-evolutionary systems that can serve as models for conceptualizing family interaction. By exploring both their unique and interrelated impact on affect regulation, we can differentiate between processes that foster healthy growth and those leading to individual psychopathology. This perspective facilitates the integration of biological and psychological models, and has therapeutic implications. It also integrates well with other family therapy models.

When a deaf child is born to hearing parents, a grieving process is initiated in the parents. Unresolved grieving over their child's deafness often makes it difficult for hearing parents to accept the importance of signing, thus increasing the child's problems--a further source of grief for these parents. Clinical illustrations are provided of (1) the reciprocal relationship between disruption of the mourning process and disturbance of communication between family members, and (2) the transmission of the dysfunctional relationship between hearing parents and deaf children to the subsequent relationship between the deaf children, when they reach adulthood, and their hearing children.

A number of assumptions related to the systemic therapists' view of family functioning in the case of biological deficit in the child are presented and challenged. The families' behavior, it is argued, may not be primarily responsible for the difficulties of their biologically impaired offspring. Severity of handicap need not be directly linked to stress in these families, nor is avoiding an individual diagnosis helpful to them. To further clarify the relevant issues, the family's "reactions" to a dysfunctional member, along with the professionals' previously unhelpful approaches to dealing with the impairment of these children, are presented. Finally, the therapeutic implications of the position presented in this article are drawn, and specific recommendations for working with these families are offered.

Ethology offers psychiatry and family therapy an alternative perspective for understanding hierarchical dysfunction and individual psychopathology and the relation between them. Dominance and submission behaviors--descriptions from ethology--represent communicational mechanisms that play pivotal roles in maintaining the stability of the family group. When conflict becomes acute, dominant and submissive states are experienced as euphoria and mild depression respectively. Smooth functioning of these communicational mechanisms at the individual level enhances cohesion at the group level. Feelings of inadequacy and inferiority may be manifestations of submissive patterns and may function to maintain negative or corrective feedback loops, which preserve group stability. However, these communicational mechanisms may exhibit positive feedback runaway effects such that family crises result. These and other clinical implications of the model are explored.