DISC Personality is a behavioral assessment tool that measures an individual’s dominant behavioral traits. The acronym DISC stands for the four primary personality types identified in the model: Dominant (D), Inspiring (I), Supportive (S), and Conscientious (C).

The DISC model was developed by William Moulton Marston, a psychologist, and author of the book “The Emotions of Normal People.” Marston believed that people have a predictable pattern of behavior that can be classified into four primary personality types.