The Myth of Operationism Thomas H. Leahy, Virginia Commonwealth University The Journal of Mind and Behavior, Autumn 1980, Vol. 1, No. 2, Pages 127-144, ISSN 0271-0137 Psychologists’ belief in operational definition has remained unshaken since its inception in the 1930’s despite numerous other changes in psychological systems. This paper argues that continued faith in operationism