Recently there has been considerable research exploring the interpersonal relationships of patients diagnosed with panic disorder with agoraphobia. In general, recent empirical investigations support the notion that agoraphobics' interpersonal relationships are problematic and can decrease treatment efficacy. In addition, it appears that involving the partner of the agoraphobic in treatment may be more effective than treating the client alone. However, these conclusions are limited by several methodological and conceptual shortcomings, including narrow and/or biased sample selection, lack of adequate measures, and insufficient use of suitable control groups.