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 H. Marston William H. Marston Captain William Harrington Marston (1835-1926) was an early resident of Berkeley, California. He served as President of the Town Board of Trustees from 1899 to 1903. Captain Marston was born in Cutler, Maine in November 1835, and orphaned at age 9. He was eventually taken in by the Plummer family. Mr. Plummer was a seaman, and Marston decided at age 17 to follow in his footsteps. He started as a cabin boy, and worked himself up to first mate by 1859. In 1860, the Plummers decided to move to California, and Marston went with them, arriving in