The entailment model of attributions is examined for the first time using a dyadic approach and longitudinal data. In a sample of 229 married partners with children, causal attributions were distinguished empirically from responsibility attributions and, consistent with the entailment model, the effect of causal attributions on conflict was mediated through attributions of responsibility. Only 1 path was influenced by spouse gender. Examination of cross-spouse effects revealed significant effects and provided a better fit than a model with no cross-spouse effects. The importance of including cross-spouse effects in attributional models is discussed.