New Study Dismantles Malcolm Gladwell's 10,000 Hour Rule The principle that 10,000 hours of 'deliberate practice' are needed to become world-class in any field may not be what it seems.

By Drake Baer

This story originally appeared on Business Insider

The 10,000 Hour Rule — closely associated with pop psych writer Malcolm Gladwell — may not be much of a rule at all.

The principle holds that 10,000 hours of "deliberate practice" are needed to become world-class in any field.

When psychologists talk about deliberate practice, they mean practicing in a way that pushes your skill set as much as possible.

In "Outliers," Gladwell contends that early access to getting 10,000 hours of practice allowed the Beatles to become the greatest band in history (thanks to playing all-night shows in Hamburg) and Bill Gates to become one of the richest dudes around (thanks to using a computer since his teen years).

But a new Princeton study tears that theory down. In a meta-analysis of 88 studies on deliberate practice, the researchers found that practice accounted for just a 12% difference in performance in various domains.

What's really surprising is how much it depends on the domain:

  • In games, practice made for a 26% difference
  • In music, it was a 21% difference
  • In sports, an 18% difference
  • In education, a 4% difference
  • In professions, just a 1% difference

The best explanation of the domain dependency is probably found in Frans Johansson's book "The Click Moment."

In it, Johansson argues that deliberate practice is only a predictor of success in fields that have super stable structures. For example, in tennis, chess, and classical music, the rules never change, so you can study up to become the best.

But in less stable fields, like entrepreneurship and rock and roll, rules can go out the window:

  • Richard Branson started in the the record business but quickly branched out into fields well beyond music: Virgin Group has 400 companies and is launching people into space.
  • Then there's a band like the Sex Pistols, who took the world by storm even though Sid Vicious could barely play his bass.

So mastery is more than a matter of practice.

"There is no doubt that deliberate practice is important, from both a statistical and a theoretical perspective. It is just less important than has been argued," the study's lead author, Brooke Macnamara, said in a statement. "For scientists, the important question now is, what else matters?"

Drake Baer reports on strategy, leadership, and organizational psychology at Business Insider. He is the co-author of Everything Connects: How to Transform and Lead in the Age of Creativity, Innovation, and Sustainability. Before joining BI, Drake was a contributing writer at Fast Company. Before that, he spent years exploring the world. 

Want to be an Entrepreneur Leadership Network contributor? Apply now to join.

Business Ideas

70 Small Business Ideas to Start in 2025

We put together a list of the best, most profitable small business ideas for entrepreneurs to pursue in 2025.

Business News

Here Are the 10 Highest-Paying Jobs with the Lowest Risk of Being Replaced By AI: 'Safest Jobs Right Now'

A new report from career resources platform Resume Genius finds the top 10 AI-proof careers expected to see the most growth within the next decade.

Science & Technology

How AI Can Free Up Your Time For Less Busywork and More Innovation

If there's one trait every founder needs, it's a willingness to experiment. Today, experimentation is easier and more accessible than ever thanks to AI.

Making a Change

Learn Up to 56 Languages for Just $35

Get lifetime access to the platform that turns language learning into a game.

Science & Technology

How I Went From Side Hustle to 7 Figures Using These 4 AI Tools (No Tech Skills Needed)

Scale faster, work less and grow a 7-figure business — no team needed.

Health & Wellness

How Mastering Your Nervous System Boosts Leadership Presence and Performance

Discover a modern leadership system designed to boost your effectiveness, reduce stress and bring more clarity and joy to how you lead.