The strength of linear correlation between percent correct responses and the BOLD response differs significantly between musicians and non-musicians in the 2B task.

<p>The four regions illustrated are those that individually exhibit a significantly more positive linear slope in musicians than non-musicians in the 2B condition. This tendency, which is also present in the 1B condition, shows that by recruiting more brain resources during a WM task, musicians are able to sustain a higher performance level in face of the elevated cognitive demands. The green dots in each plot are measurements from individual subjects, and the orange line is the corresponding best-fitting regression line. NB: A single model was fit that was flexible enough to allow all four slopes to differ (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0011120#s2" target="_blank">Methods</a> for details); no R²-values are therefore given for the individual slopes. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0011120#pone-0011120-t003" target="_blank">Table 3</a> for a full account of the results and general tendencies for all regions.