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If notability cannot be established, the article is likely to be merged, redirected, or deleted. DISC is a behavior assessment tool based on the DISC theory of psychologist William Moulton Marston, which centers on four different behavioral traits: dominance, inducement, submission, and compliance. This theory was then developed into a behavioral assessment tool by industrial psychologist Walter Vernon Clarke. Also, he argued that these behavioral types came from people’s sense of self and their interaction with the environment.
He included two dimensions that influenced people’s emotional behavior. The first dimension is whether a person views his environment as favorable or unfavorable. The second dimension is whether a person perceives himself as having control or lack of control over his environment.
His work was the foundation of the DISC assessment that has been used by more than 50 million people since it was first introduced in 1972. Although Marston contributed to the creation of the DISC assessment, he did not create it. In 1956, Walter Clarke, an industrial psychologist, constructed the DISC assessment using Marston’s theory of the DISC model. He did this by publishing the Activity Vector Analysis, a checklist of adjectives on which he asked people to indicate descriptions that were accurate about themselves.
This assessment was intended for use in businesses needing assistance in choosing qualified employees. About 10 years later, Walter Clarke Associates developed a new version of this instrument.
It was called Self Description. Instead of using a checklist, this test forced respondents to make a choice between two or more terms. Factor analysis of this assessment added to the support of a DISC-based instrument.
Self Description was used by John Geier to create the original Personal Profile System in the 1970s. Through hundreds of clinical interviews, he furthered the understanding of the 15 basic patterns discovered by Clarke. In 1984, Jack Morrison’s doctoral dissertation, A Correlation Study of the Personal Profile System with the Sixteen Personality Factors Questionnaire concluded that the DISC has construct validity with significant correlations compared to the 16 PF strongly suggesting that it has scientific validity as a psychometric instrument.