DISC assessment DISC assessment DISC is a behavior assessment tool based on the DISC theory of psychologist William Moulton Marston, which centers on four different personality traits which are currently Dominance (D), Influence (I), Steadiness (S), and Conscientiousness (C). This theory was then developed into a behavioral assessment tool by industrial psychologist Walter Vernon Clarke. Marston was a lawyer and a psychologist; he also contributed to the first polygraph test, authored self-help books and created the character Wonder Woman. His major contribution to psychology came when he generated the DISC characteristics of emotions and behavior of normal people (at the time, 'normal'
William Moulton Marston of the polygraph, when he subsequently embarked on a career in entertainment and comic book writing and appeared as a salesman in ads for Gillette Razors, using a polygraph motif. From his psychological work, Marston became convinced that women were more honest than men in certain situations and could work faster and more accurately. During his lifetime, Marston championed the latent abilities and causes of the women of his day. Marston was also a writer of essays in popular psychology. In 1928, he published "Emotions of Normal People," which elaborated the DISC Theory. Marston viewed people behaving along two axes,