One of the most intriguing questions since the time of Plato concerns what defines skillful performance in terms of specific capabilities, knowledge, competence, and expertise. As Frederick Taylor famously noted, an answer to that question would enable us to know what to focus on and what to do...

This handbook integrates the insights of some of the field's most respected thinkers to further our understanding of its essential characteristics, consider how it might be practically applied, and explore how it might be developed