Additionally , an age - matched sample with 12 older experts and 12 older amateurs ( mean age 59.8 ) was used .
Study two involved 12 young expert pianists and 12 young amateurs ( mean age of 24.3 ) .
An age - matched sample with 12 older experts and 12 older amateurs ( mean age 59.8 ) was used .
Study two involved 12 young expert pianists and 12 young amateurs ( mean age of 24.3 ) .