Integrating developmental and systems theories, the authors propose an original scenario by which to understand and treat the family unit. Under study here is the "primary triangle" of mother-father-infant. The authors provide a complex research paradigm for examining the interactional triangles formed in the family during the early years.

This volume provides an insider's view on how infant communication develops in the context of the family and how parents either work together as a team or struggle in the process. The authors present vignettes from everyday life as well as case studies from a longitudinal research project of infants and their parents interacting together in the Lausanne Trilogue Play (LTP), an assessment tool for very young families.