A Few More Details

The Dunning-Kruger Effect

The Dunning-Kruger Effect is the cognitive bias where people with low ability or knowledge in a domain overestimate their competence, while those with high ability are more likely to underestimate their performance.

The less someone knows, the more confident they often feel—because they don’t know what they don’t know.

Why It Happens

• Inexperienced individuals lack the skills to accurately assess their own ability.
• Confidence comes from familiarity, not mastery.
• True experts are more aware of the complexity involved, making them more cautious.
• It feels better to believe “I’ve got this” than to say “I need help.”

Why It Can Be Good

• Boosts initiative and self-confidence, especially when starting something new.
• Encourages people to step up or volunteer, even when they’re still learning.
• Creates opportunities to learn through experience—when paired with coaching.
• Can help overcome imposter syndrome in more skilled individuals.

Why It Can Be Bad

• Leads to poor decisions made with high confidence.
• Increases risk of injury or error, especially in high-hazard work.
• Makes people resistant to coaching or correction.
• Skilled workers may doubt themselves, leading to underutilized talent.

How It Shows Up in Leaders

• Feeling overconfident about a new task or tool, even without formal training.
• Assuming you already know enough about a topic after limited exposure.
• Shutting down questions or suggestions from more experienced team members.
• Not asking for help or double-check decisions—because “it’s simple.”
• It might sound like: “It’s just common sense.” “I’ve seen it done—I know how it works.” “I don’t need the manual. I’ve got it.”

How It Shows Up in Teams

• Newer workers act overly confident with tasks they’ve only done once or twice.
• Crew members skip steps or disregard procedures, thinking they know better.
• They resist training or feedback with phrases like: “I already know how to do that.” “I’ve done it before—it’s not a big deal.” “I don’t need to be babysat.”
• More experienced team members stay quiet or second-guess themselves, even when they notice mistakes.