I remember sitting in a windowless hotel conference room about eight years ago, the smell of stale coffee and industrial carpet cleaner heavy in the air. I was leading a DiSC workshop for a mid-sized marketing firm. I had my colorful slides, my laminated handouts, and, if I’m being completely honest, a massive ego.
I pointed to a gentleman in the front row named Gary, who had been quiet the whole morning. “Classic High S,” I said with a confident smirk. “Gary’s probably just waiting for us to tell him it’s okay to take a break so he doesn't disrupt the harmony of the room.”
The room went dead silent. Gary didn't smile. He looked at his results, then looked at me, and said, “Actually, I’ve been quiet because I’m trying to figure out how these results could possibly be right when I spend my weekends racing motorbikes and managing a crisis hotline.”
Yikes.
I had made the cardinal sin of behavioral training: I had put Gary in a box, taped it shut, and labeled it with a Sharpie. I’d used the DiSC assessment as a weapon of oversimplification rather than a tool for understanding.
Since then, I’ve realized that while DiSC is an incredible framework for improving communication and team engagement, it is also remarkably easy to mess up. Even as someone who has been around the block, I still catch myself slipping into these traps.
If you’re using DiSC with your team, or thinking about it, here are the most common mistakes I see (and the ones I’ve definitely made myself).
1. Using "Color Language" to Stereotype
We’ve all heard it. “Oh, don't mind Sarah, she’s a High D, she doesn't have feelings,” or “Typical ‘I’ behavior, always talking and never doing.”
When we start using the DiSC quadrants as a shorthand to dismiss people, we’ve lost the plot. The goal of the assessment isn't to categorize people so we can ignore their complexity; it’s to help us adapt our own behavior to meet them where they are.
I’ve found that using stereotyping language actually limits growth. It imprisons people in their style. If I tell someone “That’s just who you are,” I’m giving them an excuse to stay static. I’ve learned to shift the language to: “I see you have a strong preference for D-style results... how can we develop your S-style traits when the team needs more stability?”
It’s a subtle shift, but it moves the conversation from a life sentence to a developmental journey.
2. Assuming DiSC Predicts Success
This is a big one, especially in the hiring world. I once had a client who refused to hire anyone for a sales role who wasn't a "High I/D" profile. They thought they had found the secret sauce to the perfect hire.
Spoiler alert: They hadn't.
DiSC measures behavioral tendencies, how you prefer to communicate, how you respond to pace, and how you handle challenges. It does not measure skills, experience, or job performance. A "High C" (Conscientious) person can be a world-class salesperson because they are meticulous with follow-up and know their product data inside and out.
If you use DiSC as a "pass/fail" test for a job, you’re likely missing out on incredible talent. It’s a piece of the puzzle, not the whole picture. I always tell my coaching clients that DiSC tells you how they will do the work, not if they can do the work.
3. Neglecting the "Full Profile"
When people get their results, they usually flip straight to the big dot on the graph. "I'm a D! Cool!" And then they close the folder.
But if we only look at the composite self-concept (the "average" of how we see ourselves), we miss the real gold. In more advanced DiSC applications, we look at three different diagrams:
- Diagram I: Your public self-concept (how you think you need to act).
- Diagram II: Your private self-concept (how you act when the pressure is off).
- Diagram III: The composite (your overall style).
I once worked with a leader who was a "High D" in her public self-concept but a "High S" in her private self. She was exhausted! She was forcing herself to be a hard-charging, fast-paced commander at work because she thought that’s what leadership looked like, even though her natural inclination was toward collaboration and stability.
Without looking at the full profile, we would have never diagnosed her burnout. If you’re just scratching the surface, you’re leaving 70% of the value on the table.
4. Selecting the Wrong Focus
Behavior is a cocktail of personality and environment. If you ask a team to take a DiSC assessment but don't give them a specific "lens" to look through, the results get messy.
Are they answering as "Me as a parent," "Me as a leader," or "Me as a teammate"?
I remember a project where the results felt... off. We realized half the team was thinking about their stressful home lives while the other half was thinking about their professional roles. When the focus is too vague, the assessment struggles to find its footing.
Before I let anyone hit "submit" on an assessment, I always provide a specific scenario. "Think about how you behave when you are sitting at your desk on a Tuesday morning with a deadline looming." That clarity creates accuracy.
5. Playing Favorites
As facilitators and leaders, we have our own DiSC styles. And, if we aren't careful, we unconsciously favor people who share our style.
I’m naturally fast-paced and task-oriented. Earlier in my career, I’d find myself praising the "D" and "i" styles in workshops because their energy matched mine. I’d unintentionally treat the "C" style’s need for data or the "S" style’s need for deliberation as "roadblocks" to the training.
Yikes... talk about a blind spot.
A good trainer, and a good leader, shows equal appreciation for all four dimensions. The "C" isn't being difficult; they’re ensuring we don't crash the car because we didn't check the tires. The "S" isn't being slow; they’re ensuring the team actually survives the journey together.
6. Ignoring the "Why" (Motivators and EI)
DiSC is a great "what." It tells us what people do. But it doesn't always tell us why they do it.
Sometimes, we expect DiSC to solve every interpersonal conflict. But if a conflict is based on a difference in core values or a lack of emotional intelligence (EI), a DiSC chart isn't going to fix it.
I’ve found that DiSC works best when it’s paired with other tools. If I’m honest, I used to think DiSC was the "one-stop shop" for organizational health. It’s not. It’s the gateway. You have to be willing to look deeper into the operational rhythms and cultural values that sit underneath the behavioral surface.
7. The "One and Done" Workshop
This is perhaps the biggest mistake of all. You spend the money, you bring in a consultant (maybe even me!), everyone has a "Kumbaya" moment for four hours, and then... nothing.
The folders go into a desk drawer and gather dust.
Behavioral change takes time. It’s like wet cement, you have a very small window to shape it before it sets. If you don't integrate the language into your weekly 1:1s, your project meetings, and your performance reviews, it will fail.
I’ve written before about why one-off workshops won't stick, and it remains the hill I will die on. Real transformation happens in the follow-through.
How to Fix It
If you’ve read this and realized, "Oh man, I've definitely called someone 'a typical yellow' in a meeting this week," don't panic. I’ve been there. We all have.
The fix is actually pretty simple:
- Apologize for the box. If you’ve pigeonholed a team member, admit it. It shows humility and models the very adaptability you’re looking for.
- Focus on "The Stretch." Stop talking about what people are and start talking about where they can stretch. Ask, "How can you lean into your 'i' style during this presentation?"
- Keep the conversation alive. Bring the DiSC profiles out once a month. Discuss how the team’s collective style is helping or hindering your current goals.
Leadership is messy. It’s full of contradictions and "I can't believe I just said that" moments. But the beauty of tools like DiSC is that they give us a map to navigate the mess. Just make sure you’re using the map to explore the landscape, not to build a fence around it.
I’m still learning this every day. Even after years of consulting, I still have to catch myself from making assumptions based on a letter on a page. But that’s the journey, right?
If you’re feeling like your team communication is a bit... tangled, I’d love to help you untie the knots (without the windowless hotel rooms, hopefully). Feel free to reach out to us here. I’d love to hear about the mistakes you’ve seen (or made!) and how you’re working through them.
After all, we’re all just trying to figure out how to work together without driving each other crazy.
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