Anders Ericsson was a Swedish psychologist known for his research on expertise and performance. He is best recognized for developing the concept of deliberate practice, which emphasizes focused and purposeful training to achieve high levels of skill in various fields, including music, sports, and academics. His work has influenced how people approach learning and mastery. Ericsson's research highlighted that innate talent is not the sole factor in achieving expertise. Instead, he argued that consistent, structured practice over time is crucial. His findings have been widely cited in discussions about expertise, learning, and skill development, impacting educators, coaches, and performers alike.