Public administration, both as a field of theory and an arena of practice, has long borrowed from other professional fields and academic disciplines. Political science, economics, sociology and systems analysis, to name a few, have contributed greatly to an understanding of administrative phenomena. Only limited attention, however, has been devoted to the contributions of the field of psychology, especially as it relates to individual behavior in organizations. The preference of most public administration scholars has been to study the rational, empirical, and nomothetic aspects of administrative life rather than the ideographic and unrational (or irrational). Over the time that public administration has developed as a field of study, most of its paradigms have been rational and positivistic-from scientific management at the turn of the century, to the economy and efficiency movement of the 1920s, to the science of administration in the 1930s, to the behaviorism and systems analysis of the 1950s and 1960s, to the political economy and public choice orientation of the 1970s. Rationality and management theory have gone hand in hand, with little recognition of the role of the irrational or unconscious in the individual and in organization life. Two major exceptions to this trend have appeared, providing grist for the mill of those interested in the psychological aspects of administration. One was the Hawthorne studies and related research in the late 1920s and 1930s which uncovered the influence of morale and emotional factors in work groups and the importance of informal organization. The other was the popularity in the 1960s and early 1970s of a new public administration, concerned in part with the roles of individuals and groups in organizational dynamics and influenced by the humanistic psychology of Abraham Maslow and Carl Rogers. This movement, and the allied focus on Organization Development, however, have been concerned more with group interaction and with healthy and self-actualized organizations rather than with the individual psyche. Some 30 years ago, Dwight Waldo, in reviewing the contributions of various social science disciplines to public administration, noted with prescience: