In one study, Ericsson and colleague, William Chase found that a college student was able to increase the number of random digits he could recall from seven to nearly 80 after 230 hours of practice. In another study, Japanese psychologist Ayako Sakakibara took 24 children from a private music school and dropped them into a training program designed to develop perfect pitch. With a trainer playing a piano, the kids learned to identify chords using colored flags. Afterward, they were tested on their ability to identify the pitch of each individual note and all of the children seemed to have acquired perfect pitch. Ericsson and Pool’s concluded, perfect pitch is not something we are born with, but something anyone can develop with proper training.