Use of the multitrait multimethod (MTMM) to analyze family relational data

In this article, the authors propose the logic of the multitrait multimethod (MTMM) approach for analysis of data as an alternative solution for examining family relational data. Application of the MTMM logic permits the assessment of common perspectives shared by all family members and of the unique perspectives of individuals. The advantages of using this approach in family research include the ability to (a) maintain consistency between systems theory views of family-as-a-unit, and (b) delineate patterns of agreement, disagreement, or both among family members.