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Abstract
We review contemporary research focusing on expertise and expert performance in sport. The deliberate practice theoretical framework is presented, and the level of investment in purposeful practice needed to reach the elite level in sport is illustrated. We highlight some of the adaptations that occur as a result of extended engagement in practice and training, with particular reference to perceptual-cognitive skills, such as anticipation and decision-making. These psychological adaptations are explained through reference to long-term working memory theory. Finally, the expert performance approach is presented as a guiding framework for studying expertise in sport, and some suggestions for future research are proposed. The study of expertise and expert performance in sport offers a unique source of data that help promote understanding of the factors that constrain human achievement and the extent to which these may be overcome by systematic engagement in practice and training.