AbstractTo test the hypothesis that relationship beliefs are related to marital adjustment, 46 married couples completed the Relationship Belief Inventory (RBI) and the Dyadic Adjustment Scale (DAS). Significant correlations were found between the DAS scores and the D and S subscales of the RBI. It was shown that the low dyadic adjustment group made significantly more extreme evaluations compared to the high adjustment group. It also was found that individuals' perceptions of their spouses' relationship beliefs did not display the same trends observed with traditional personality questionnaires, in which marital adjustment was related to female accuracy and greater real similarity between spouses.