Expertise as something developed
Ericsson’s research investigated the training histories and practice activities of expert performers. The work made practice design and mental representations central questions in the study of excellence.

PEOPLE WORTH GETTING TO KNOW
What it means to practice getting better.
Anders Ericsson studied the development of expertise. In Peak, written with Robert Pool, he brings that research into a discussion of how people learn and improve.
Peak is the accessible introduction selected here. His research papers provide a more precise account of the terminology and evidence behind the ideas.
A CLOSER LOOK
Peak, purposeful practice, and the science of developing expertise.
Ericsson’s research investigated the training histories and practice activities of expert performers. The work made practice design and mental representations central questions in the study of excellence.
Peak, written with Robert Pool, distinguishes purposeful practice from the narrower concept of deliberate practice. Those ideas have their own pages here.
A GOOD PLACE TO BEGIN

Anders Ericsson & Robert Pool
Secrets from the New Science of Expertise. A starting point for understanding Ericsson's research into practice and exceptional performance.
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Practice informed by expertise
In Ericsson's framework, deliberate practice is a specific form of purposeful practice, informed by established knowledge of expert performance and effective training methods, often with a qualified teacher.
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Idea
A related idea with a broader definition than deliberate practice.
Explore this selection →Introductions are grounded in the sources below. Collection notes and reading prompts provide an editorial starting point; personal opinions are identified in the collection’s content.