Individuals from diverse disciplines, including neurology, physiology, psychology, mathematics, and engineering have contributed to this volume. Their scientific investigations of volitional action are part of the resurgence of interest in the psychology and physiology of volition which has taken place in recent years. The book comprises a significant sample of their observations, both rational and empirical, which have new practical implications for our understanding of human conduct. The book was designed to serve a threefold purpose: a) to consolidate the gains of the various scholars, relatively isolated in their respective disciplines, b) to foster and help focus future research on conation and self-control and c) to provide practitioners in applied psychology with a broad-based tutorial.