Rationalization was studied by Sigmund Freud and was specifically labeled by Ernest Jones. Rationalization ought to be differentiated from rational, rationality, logical analysis, etc. On the one hand, rationalization is considered a defense mechanism, on the other hand, rationality is not. Haan has done much work with self-report inventories and coping and defense mechanisms (also see Kroeber, and Alker). Wertheimer indicates that rationalization is the bane of our college students. Bibring, Dwyer, Huntington, and Valenstein have written extensively about defenses. The bibliography ranges from the earlier work of Jones to the later work of the middle 1960's. (Author)