Abstract
Early general systems theorists proposed a key difference between living systems and physical systems is the widespread presence of equifinality and multifinality among living organisms. That is, in living systems, there are often variable pathways to the same outcomes (equifinality), or the same starting conditions can lead to disparate outcomes (multifinality). Family scientists, however, frequently use methods (adapted from the physical sciences) that fail to reflect these characteristics within their statistical models. In this paper, we propose and provide a preliminary proof-of-concept of how an outcome-partitioned set of person-centered analyses might be used to develop alternative models that more comprehensively capture equifinality and multifinality in living systems. This approach balances the needs for parsimony and utility in family theories and models of human development, relationships, and family systems while recognizing the diversity within which individuals and families navigate many pathways to success, difficulty, or something in-between.