A DISC assessment describes a person's behavioral style across four tendencies: Dominance, Influence, Steadiness and Conscientiousness. It's based on psychologist William Moulton Marston's 1928 model and is widely used by teams to improve communication. Its main limits: it's a simplified, self-reported picture of behavior, different vendors score it differently, it doesn't predict job performance, and its own publisher says it shouldn't be used for hiring.
What DISC measures: the four styles
Most people get a primary style and often a secondary one (for example, “Di” or “SC”). Reports then explain how each style tends to communicate, decide and react under stress, and how to work with the other styles.
How teams use DISC
- Shared language: “I'm a high C, send me the details first” makes preferences easy to discuss.
- Communication workshops: teams map their styles and talk about friction points.
- Manager onboarding: a new manager learns how each report prefers to receive feedback.
- Conflict conversations: reframing “difficult” as “different” lowers the temperature.
Used this way, DISC can be genuinely helpful. The problems start when teams treat it as more than it is.
Where DISC falls short
1. It isn't a hiring tool
Wiley, which publishes Everything DiSC, states that DiSC is not recommended for pre-employment screening because it doesn't measure specific skills, aptitudes or other factors critical for a position. Using it to screen candidates adds legal risk without adding predictive value.
2. It doesn't predict performance
DISC describes style, not effectiveness. A high D isn't a better leader than a high S. If you want personality data related to job performance, the Big Five has far stronger evidence. See personality tests for employees for the research.
3. Four boxes flatten people
Behavior varies by context: someone can be decisive with a client and cautious with their manager. Four categories inevitably compress that, and labels tend to stick (“she's a D, she won't care”) long after they stop being useful.
4. It's self-reported
DISC captures how people see themselves on the day they take it. It can shift with mood, role and how they want to come across, and it says nothing about how others experience them.
5. “DISC” isn't one test
DISC is a model, not a single standardized instrument. Different vendors build and score their own versions, and they don't all define the dimensions the same way: the C, for instance, is called conscientiousness by some and compliance or cautiousness by others. Two DISC reports from different providers aren't directly comparable.
6. Insight without a plan fades
Most DISC rollouts end with a workshop. Without a development plan, practice and follow-up, the shared language is usually forgotten within months.
DISC vs. Big Five
| DISC | Big Five | |
|---|---|---|
| Origin | Marston's 1928 behavioral model | Decades of trait research in academic psychology |
| Output | Style category | Scores on five continuous traits |
| Link to performance | Not designed for it | Supported by meta-analyses (especially conscientiousness) |
| Ease of use | Very easy to remember and discuss | Needs more explanation |
| Best for | Team communication workshops | Development and research-grade insight |
How to run a DISC session that actually helps
- Frame it as a starting point. Say out loud that styles are tendencies, not limits, and that no style is better.
- Talk about behaviors, not letters. “I need details before I decide” is more useful than “I'm a C.”
- Agree on two or three team norms. For example, how decisions get made and how feedback is given.
- Keep it out of people decisions. No hiring, promotion or project assignments based on letters.
- Follow up. Revisit the norms in a month and connect each person's insight to a development goal.
Beyond DISC: what to use alongside it
If DISC opened the conversation, the next step is richer, continuous insight connected to action. Cairo profiles each person across 80+ behavioral indicators shown as spectrums rather than four boxes, aggregates them into team views that show where a team fits, clashes or lacks a perspective, and turns every insight into a personalized learning path with practice scenarios. Profiles are used for development, and decisions about people stay with leaders.
Frequently asked questions
What does DISC stand for?
Dominance, Influence, Steadiness and Conscientiousness. Some versions use compliance or cautiousness for the C.
Is DISC scientifically valid?
Some DISC instruments show reasonable reliability for describing behavioral style, but DISC is not designed or validated to predict job performance. For that, Big Five-based measures have much stronger evidence.
Can you use DISC for hiring?
It isn't recommended. Wiley, the publisher of Everything DiSC, says DiSC is not recommended for pre-employment screening.
What is DISC best used for?
Improving communication in teams, helping managers adapt to each report and giving people a shared language for working styles.
What's a good alternative to DISC for teams?
For prediction and depth, assessments based on the Big Five. For ongoing team insight connected to development, behavioral people intelligence platforms like Cairo.
Sources
- Marston, W. M., Emotions of Normal People, 1928.
- DiSC Profile (Wiley), Is DiSC a good tool for hiring?
- Barrick, M. R., & Mount, M. K., The Big Five personality dimensions and job performance: A meta-analysis, Personnel Psychology, 1991.
- SHRM, How Accurate Are Personality Assessments?
- Truffle, Why DISC assessment vs. Myers-Briggs is the wrong hiring question, 2026.
