Background: Personality disorders are important because they occur fre
quently and often complicate psychiatric symptom disorders. They are d
ifficult to diagnose and formulate because unitary core traits and the
mes are hard to define for individual patients. A multiple-selves appr
oach helps clinicians define core contradictions in belief that are fr
equently present. Method: A configurational system for case formulatio
n was used with an approach of states and person schemas. Transactions
and stories involving self and others were observed for recurrent ele
ments of identity, attribution, and action. These elements were system
atically arranged as role relationship models for each important state
of behavior. Cyclic repetitions of maladaptive interpersonal behavior
patterns were then explained in terms of motivations and social event
s that activate enduring, but erroneous, beliefs. Results: Reliable an
d valid individualized formulations were derived by means of configura
tions of role relationship models. Inferring several levels of diverse
self and other beliefs clarified the complexity usually found in diso
rders of personality. Conclusions: The role relationship models method
of formulation is compatible with integrative approaches to treatment
planning.