Interpersonal problems are frequently a source of distress for individ
uals and the focus of psychotherapeutic interventions. A self-report c
ircumplex measure, the Inventory of Interpersonal Problems-Circumplex
(IIP-C), was modified for this investigation to acquire peer report da
ta on interpersonal problems to help assess the validity of self-repor
ted problems. The peer report data replicated the circumplex model of
the IIP-C and when general interpersonal distress was removed (by ipsa
tizing), the data suggested that peers observed more domineering, vind
ictive, and emotionally cold types of problems than self-report (ipsat
ized) data. Individuals reported more other-pleasing, overly nurturant
types of problems than peers observed. The findings both support the
validity of the IIP-C and describe discrepancies in self-versus peer r
eported interpersonal problems. The results also describe differences
in the general interpersonal distress factor accounted for by ipsatizi
ng versus removing the general factor from unipsatized data. The resul
ts describe implications for clinicians and others assessing interpers
onal problems.