The DISC Model of Behavior originated from William Moulton Marston’s theoretical work, a Harvard Ph.D., outlined in his 1928 book, “The Emotions of Normal People,” introducing a psychology system using the DISC acronym. While not the first model of human behavior (Hippocrates touched on temperaments), today’s assessment systems are primarily linked to either DISC or Myers Briggs, developed by Carl Jung.

Where do you fit in the DISC Model of Behavior? Remember, you possess traits from all four types! Research indicates that most people are dominant in two types, but some are equal in all four, known as being “level.”

In the DISC Model, two personality types are OUTGOING – represented by “D” and “I,” while the other two are RESERVED – represented by “S” and “C.” Additionally, two types are TASK-ORIENTED – “D” and “C,” and two are PEOPLE-oriented – “I” and “S.” If you are OUTGOING and TASK-ORIENTED, you mainly fall into the “D” type. Keep in mind that you exhibit characteristics from all four types. Refer below for detailed descriptions of each type and the corresponding letter they represent!

“D” or Dominant Types:

This personality type is outgoing, strong minded, and daring! They believe you should lead, follow, or get out of the way! Here are others words to describe them:

Defiant – (their challenge)

“I” or Inspiring Types:

This personality type is outgoing and loves to have fun. They don’t have to worry about going to a party. They take the party with them everywhere they go! “I”s are:

Illogical – (their challenge)

“S” or Supportive Types:

This personality type is more reserved, but still people oriented. They want to know why we can’t just all get along. They love peace and harmony! “S” types are:

Sucker – (their challenge)

“C” or Cautious Types:

This personality type is a perfectionist in nature. If you’re going to do it, do it right! They believe in quality over quantity! “C” types are also:

Critical Thinking
Compliance Wanting
Cold – (their challenge)


Interested in discovering more about DISC? The amount of knowledge is vast! There are numerous ways to dive deeper:

  • Explore my blog on this website for insights into how DISC influences various aspects of our lives.
  • Sign up for a free weekly video tip and newsletter via email by signing up on our site.
  • Purchase my popular book, “Stop Squatting With Your Spurs On,” to master reading personality types in under a minute, available on the “online store” page.
  • Do an online personality assessment by purchasing one in our store for as little as $12.95 or take advantage of our free mini assessment available on our site.

Enjoy exploring the world of DISC personality types and always let your personality shine!

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Your training has changed my life.Knowing that I am a strong type “D” personality, it has helped me understand my impatience with others when I want to “get to the point and move on” in discussions. I try to be more understanding in this regard.

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