One of the cornerstones of the functional family therapy model proposed by Alexander and Parsons (1982) is the assessment of interpersonal functions, which has traditionally been accomplished through intuition and clinical judgment. In this study, 109 college freshmen were recruited to evaluate the test-retest reliability of a videotaped scenario measure and a questionnaire designed to assess interpersonal functions. Subjects responded to both measures during an initial assessment phase and then again, during a second assessment phase, 2 weeks later. Pearson product-moment correlations and average agreement percentages indicate that both measures have adequate reliability. There were no sex differences, nor were subjects' responses related to a measure of social desirability.