The predominant theoretical orientation of the majority of scientists studying human behavioral development and family functioning is derived from systems models. These theories are dynamic in their conceptualization and emphasize process and context. To a large extent, the analytic strategies we employ are not consistent with our theoretical assumptions. Analytic methods that focus on moderating and mediating processes rather than main effects, on within-group variability and the sources of that variability, and on the identification of interrelated patterns of change in individuals, families, and environments are needed for our research results to mirror the complexity of our theories.