Despite the relevance of moral development to professional education, little research has been done to examine the application of moral development theory. To relate Analytic Interactive Style to post-formal operational thinking or "unitary operations thinking," to test the relationship between level of moral development and Analytic Interactive Style, and to examine whether this relationship is mediated by age, the Edwards' Situational Preference Inventory (SPI), Analytic Scale, and the Defining Issues Test (DIT) were administered to 62 graduate students, ranging in age from 23 to 59. The results supported the hypothesis of a significant relationship between level of moral development and Analytic Interactive Style. Furthermore, age was not found to be a mediator variable. The findings also support the interrelationship of moral development, "flexibility-reaching out," and helper effectiveness, and provide indirect evidence of the importance of holistic thinking as an explanatory theoretical underpinning. (JAC)