a scale, in Scientology, which shows the emotional tones of a person. These, ranged from the highest to the lowest, are, in part, serenity, enthusiasm (as we proceed downward), conservatism, boredom, antagonism, anger, covert hostility, fear, grief, apathy. An arbitrary numerical value is given to each level on the scale. There are many aspects of the Tone Scale and using it makes possible the prediction of human behavior. See also Scientology in this glossary.—Perception of Truth Approved Glossary (9 June 92)