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'
Elizabeth Holloway Marston the polygraph test. In 1921, William received his PhD from Harvard and Marston her MA from Radcliffe. Although Marston is not listed as William's collaborator in his early work, a number of writers refer directly and indirectly to Elizabeth's work on her husband's deception research. She appears in a picture taken in his polygraph laboratory in the 1920s, reproduced in a 1938 publication by William. Marston's career included indexing "the documents of the first fourteen Congresses, lectur[ing] on law, ethics, and psychology at American and New York Universities, [and] serv[ing] as an editor for "Encyclopædia Britannica" and "McCall's". In 1933,