Originally published in 1980, this book presents a detailed account of a series of investigations that examined the patterns of resort to drugs and alcohol use in college youth, and how such substance uses are linked to personality characteristics and daydreaming patterns. The Editors chose to emphasize the more "private" features of the personality, because these had often been ignored in earlier research, despite popular assumptions that there are close ties between fantasy, inwardness, "spacey" qualities (all suggesting permanent changes in mental organization), and substance use in youth. This volume will be of interest to a wider audience than just drug and alcohol researchers, because of the effort to go beyond normative patterns of substance use toward explorations of personality and consciousness.