Quality of marriage is a term or a phrase that still lacks a clear and precise referent. Marital adjustment, success, satisfaction, compatibility, and stability are terms that have been variously employed. Following the lead of Fincham and Bradbury, a case is made for the fact that the best measure for marital quality is the global evaluation of marriage, i.e. the evaluation placed on the relationship as a whole by the marital partners. This is cybernetics of cybernetics wherein the observer becomes part of the observed. © 1991 Human Sciences Press, Inc.