Adaptability and cohesion of dyadic relationships in families with developmentally disabled children.

In 93 families with developmentally disabled children, mothers, fathers, and 1 nondisabled sibling rated the cohesion and adaptability of family dyads using D. A. Cole and A. E. Jordan's (1989) modified version of Olson's Family Adaptability and Cohesion Scale (D. H. Olson et al, 1985). With these multiple perspectives of multiple relationships, multitrait-multimethod confirmatory factor analysis was used to assess the convergent and discriminant validity of dyadic adaptability and cohesion. Three distinct cohesion traits representing the mother–father, father–child, and mother–child relationships were confirmed. In contrast, mother–child and father–child adaptability traits were highly correlated, suggesting a 2-trait model: parent–child adaptability and mother–father adaptability. The importance of this methodology for research on families with developmentally disabled children is discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)