In 2005, the Applied Cognitive Psychology journal presented the results of a study of variables that predict the skill levels of chess players. It turned out that the most powerful factor in skill is time. High-level chess players spent five times as long as intermediate-level chess players. Swedish psychologist Anders Eriksson has identified the “10,000 hour rule”. Ericsson has done research among music professionals. He divided them into three groups – stars, professionals and amateurs. He then conducted a survey among them asking the participants how much time they spent training. Almost all of them started to create music when they were kids. But over the years, the time each…