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'
Polygraph spy but was convicted for improperly obtaining US citizenship and using it to obtain a restricted position at the FBI. The polygraph also failed to catch Gary Ridgway, the "Green River Killer". Another suspect allegedly failed a given lie detector test, whereas Ridgway passed. Ridgway passed a polygraph in 1984; he confessed almost 20 years later when confronted with DNA evidence. In the interim he had killed seven additional women. Conversely, innocent people have been known to fail polygraph tests. In Wichita, Kansas in 1986, because he failed two polygraph tests (one police administered, the other given by an expert