Based on the 1928 DISC emotional and behavioral theory of psychologist William Moulton Marston, the DiSC personality test places people into one of four categories: dominance, influence, conscientiousness, and steadiness.
The DiSC test faces the same scrutiny that other personality tests face, that there is no basis in science for personality tests and that people's personalities are fluid, meaning they change over time and depending on the situation.
